From: Daniel Borkmann daniel@iogearbox.net

commit 353050be4c19e102178ccc05988101887c25ae53 upstream.

Commit a23740ec43ba ("bpf: Track contents of read-only maps as scalars") is checking whether maps are read-only both from BPF program side and user space side, and then, given their content is constant, reading out their data via map->ops->map_direct_value_addr() which is then subsequently used as known scalar value for the register, that is, it is marked as __mark_reg_known() with the read value at verification time. Before a23740ec43ba, the register content was marked as an unknown scalar so the verifier could not make any assumptions about the map content.

The current implementation however is prone to a TOCTOU race, meaning, the value read as known scalar for the register is not guaranteed to be exactly the same at a later point when the program is executed, and as such, the prior made assumptions of the verifier with regards to the program will be invalid which can cause issues such as OOB access, etc.

While the BPF_F_RDONLY_PROG map flag is always fixed and required to be specified at map creation time, the map->frozen property is initially set to false for the map given the map value needs to be populated, e.g. for global data sections. Once complete, the loader "freezes" the map from user space such that no subsequent updates/deletes are possible anymore. For the rest of the lifetime of the map, this freeze one-time trigger cannot be undone anymore after a successful BPF_MAP_FREEZE cmd return. Meaning, any new BPF_* cmd calls which would update/delete map entries will be rejected with -EPERM since map_get_sys_perms() removes the FMODE_CAN_WRITE permission. This also means that pending update/delete map entries must still complete before this guarantee is given. This corner case is not an issue for loaders since they create and prepare such program private map in successive steps.

However, a malicious user is able to trigger this TOCTOU race in two different ways: i) via userfaultfd, and ii) via batched updates. For i) userfaultfd is used to expand the competition interval, so that map_update_elem() can modify the contents of the map after map_freeze() and bpf_prog_load() were executed. This works, because userfaultfd halts the parallel thread which triggered a map_update_elem() at the time where we copy key/value from the user buffer and this already passed the FMODE_CAN_WRITE capability test given at that time the map was not "frozen". Then, the main thread performs the map_freeze() and bpf_prog_load(), and once that had completed successfully, the other thread is woken up to complete the pending map_update_elem() which then changes the map content. For ii) the idea of the batched update is similar, meaning, when there are a large number of updates to be processed, it can increase the competition interval between the two. It is therefore possible in practice to modify the contents of the map after executing map_freeze() and bpf_prog_load().

One way to fix both i) and ii) at the same time is to expand the use of the map's map->writecnt. The latter was introduced in fc9702273e2e ("bpf: Add mmap() support for BPF_MAP_TYPE_ARRAY") and further refined in 1f6cb19be2e2 ("bpf: Prevent re-mmap()'ing BPF map as writable for initially r/o mapping") with the rationale to make a writable mmap()'ing of a map mutually exclusive with read-only freezing. The counter indicates writable mmap() mappings and then prevents/fails the freeze operation. Its semantics can be expanded beyond just mmap() by generally indicating ongoing write phases. This would essentially span any parallel regular and batched flavor of update/delete operation and then also have map_freeze() fail with -EBUSY. For the check_mem_access() in the verifier we expand upon the bpf_map_is_rdonly() check ensuring that all last pending writes have completed via bpf_map_write_active() test. Once the map->frozen is set and bpf_map_write_active() indicates a map->writecnt of 0 only then we are really guaranteed to use the map's data as known constants. For map->frozen being set and pending writes in process of still being completed we fall back to marking that register as unknown scalar so we don't end up making assumptions about it. With this, both TOCTOU reproducers from i) and ii) are fixed.

Note that the map->writecnt has been converted into a atomic64 in the fix in order to avoid a double freeze_mutex mutex_{un,}lock() pair when updating map->writecnt in the various map update/delete BPF_* cmd flavors. Spanning the freeze_mutex over entire map update/delete operations in syscall side would not be possible due to then causing everything to be serialized. Similarly, something like synchronize_rcu() after setting map->frozen to wait for update/deletes to complete is not possible either since it would also have to span the user copy which can sleep. On the libbpf side, this won't break d66562fba1ce ("libbpf: Add BPF object skeleton support") as the anonymous mmap()-ed "map initialization image" is remapped as a BPF map-backed mmap()-ed memory where for .rodata it's non-writable.

Fixes: a23740ec43ba ("bpf: Track contents of read-only maps as scalars") Reported-by: w1tcher.bupt@gmail.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Andrii Nakryiko andrii@kernel.org Signed-off-by: Alexei Starovoitov ast@kernel.org [fix conflict to call bpf_map_write_active_dec() in err_put block. fix conflict to insert new functions after find_and_alloc_map().] Reference: CVE-2021-4001 Signed-off-by: Masami Ichikawa(CIP) masami.ichikawa@cybertrust.co.jp Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/linux/bpf.h | 3 +- kernel/bpf/syscall.c | 57 +++++++++++++++++++++++++++++++------------------- kernel/bpf/verifier.c | 17 ++++++++++++++ 3 files changed, 54 insertions(+), 23 deletions(-)

--- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -173,7 +173,7 @@ struct bpf_map { atomic64_t usercnt; struct work_struct work; struct mutex freeze_mutex; - u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */ + atomic64_t writecnt; };

static inline bool map_value_has_spin_lock(const struct bpf_map *map) @@ -1252,6 +1252,7 @@ void bpf_map_charge_move(struct bpf_map_ void *bpf_map_area_alloc(u64 size, int numa_node); void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); void bpf_map_area_free(void *base); +bool bpf_map_write_active(const struct bpf_map *map); void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); int generic_map_lookup_batch(struct bpf_map *map, const union bpf_attr *attr, --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -127,6 +127,21 @@ static struct bpf_map *find_and_alloc_ma return map; }

+static void bpf_map_write_active_inc(struct bpf_map *map) +{ + atomic64_inc(&map->writecnt); +} + +static void bpf_map_write_active_dec(struct bpf_map *map) +{ + atomic64_dec(&map->writecnt); +} + +bool bpf_map_write_active(const struct bpf_map *map) +{ + return atomic64_read(&map->writecnt) != 0; +} + static u32 bpf_map_value_size(struct bpf_map *map) { if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH || @@ -588,11 +603,8 @@ static void bpf_map_mmap_open(struct vm_ { struct bpf_map *map = vma->vm_file->private_data;

- if (vma->vm_flags & VM_MAYWRITE) { - mutex_lock(&map->freeze_mutex); - map->writecnt++; - mutex_unlock(&map->freeze_mutex); - } + if (vma->vm_flags & VM_MAYWRITE) + bpf_map_write_active_inc(map); }

/* called for all unmapped memory region (including initial) */ @@ -600,11 +612,8 @@ static void bpf_map_mmap_close(struct vm { struct bpf_map *map = vma->vm_file->private_data;

- if (vma->vm_flags & VM_MAYWRITE) { - mutex_lock(&map->freeze_mutex); - map->writecnt--; - mutex_unlock(&map->freeze_mutex); - } + if (vma->vm_flags & VM_MAYWRITE) + bpf_map_write_active_dec(map); }

static const struct vm_operations_struct bpf_map_default_vmops = { @@ -654,7 +663,7 @@ static int bpf_map_mmap(struct file *fil goto out;

if (vma->vm_flags & VM_MAYWRITE) - map->writecnt++; + bpf_map_write_active_inc(map); out: mutex_unlock(&map->freeze_mutex); return err; @@ -1086,6 +1095,7 @@ static int map_update_elem(union bpf_att map = __bpf_map_get(f); if (IS_ERR(map)) return PTR_ERR(map); + bpf_map_write_active_inc(map); if (!(map_get_sys_perms(map, f) & FMODE_CAN_WRITE)) { err = -EPERM; goto err_put; @@ -1127,6 +1137,7 @@ free_value: free_key: kfree(key); err_put: + bpf_map_write_active_dec(map); fdput(f); return err; } @@ -1149,6 +1160,7 @@ static int map_delete_elem(union bpf_att map = __bpf_map_get(f); if (IS_ERR(map)) return PTR_ERR(map); + bpf_map_write_active_inc(map); if (!(map_get_sys_perms(map, f) & FMODE_CAN_WRITE)) { err = -EPERM; goto err_put; @@ -1179,6 +1191,7 @@ static int map_delete_elem(union bpf_att out: kfree(key); err_put: + bpf_map_write_active_dec(map); fdput(f); return err; } @@ -1483,6 +1496,7 @@ static int map_lookup_and_delete_elem(un map = __bpf_map_get(f); if (IS_ERR(map)) return PTR_ERR(map); + bpf_map_write_active_inc(map); if (!(map_get_sys_perms(map, f) & FMODE_CAN_READ) || !(map_get_sys_perms(map, f) & FMODE_CAN_WRITE)) { err = -EPERM; @@ -1524,6 +1538,7 @@ free_value: free_key: kfree(key); err_put: + bpf_map_write_active_dec(map); fdput(f); return err; } @@ -1550,8 +1565,7 @@ static int map_freeze(const union bpf_at }

mutex_lock(&map->freeze_mutex); - - if (map->writecnt) { + if (bpf_map_write_active(map)) { err = -EBUSY; goto err_put; } @@ -3976,6 +3990,9 @@ static int bpf_map_do_batch(const union union bpf_attr __user *uattr, int cmd) { + bool has_read = cmd == BPF_MAP_LOOKUP_BATCH || + cmd == BPF_MAP_LOOKUP_AND_DELETE_BATCH; + bool has_write = cmd != BPF_MAP_LOOKUP_BATCH; struct bpf_map *map; int err, ufd; struct fd f; @@ -3988,16 +4005,13 @@ static int bpf_map_do_batch(const union map = __bpf_map_get(f); if (IS_ERR(map)) return PTR_ERR(map); - - if ((cmd == BPF_MAP_LOOKUP_BATCH || - cmd == BPF_MAP_LOOKUP_AND_DELETE_BATCH) && - !(map_get_sys_perms(map, f) & FMODE_CAN_READ)) { + if (has_write) + bpf_map_write_active_inc(map); + if (has_read && !(map_get_sys_perms(map, f) & FMODE_CAN_READ)) { err = -EPERM; goto err_put; } - - if (cmd != BPF_MAP_LOOKUP_BATCH && - !(map_get_sys_perms(map, f) & FMODE_CAN_WRITE)) { + if (has_write && !(map_get_sys_perms(map, f) & FMODE_CAN_WRITE)) { err = -EPERM; goto err_put; } @@ -4010,8 +4024,9 @@ static int bpf_map_do_batch(const union BPF_DO_BATCH(map->ops->map_update_batch); else BPF_DO_BATCH(map->ops->map_delete_batch); - err_put: + if (has_write) + bpf_map_write_active_dec(map); fdput(f); return err; } --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -3486,7 +3486,22 @@ static void coerce_reg_to_size(struct bp

static bool bpf_map_is_rdonly(const struct bpf_map *map) { - return (map->map_flags & BPF_F_RDONLY_PROG) && map->frozen; + /* A map is considered read-only if the following condition are true: + * + * 1) BPF program side cannot change any of the map content. The + * BPF_F_RDONLY_PROG flag is throughout the lifetime of a map + * and was set at map creation time. + * 2) The map value(s) have been initialized from user space by a + * loader and then "frozen", such that no new map update/delete + * operations from syscall side are possible for the rest of + * the map's lifetime from that point onwards. + * 3) Any parallel/pending map update/delete operations from syscall + * side have been completed. Only after that point, it's safe to + * assume that map value(s) are immutable. + */ + return (map->map_flags & BPF_F_RDONLY_PROG) && + READ_ONCE(map->frozen) && + !bpf_map_write_active(map); }

static int bpf_map_direct_read(struct bpf_map *map, int off, int size, u64 *val)

From: Daniele Palmas dnlplm@gmail.com

commit e353f3e88720300c3d72f49a4bea54f42db1fa5e upstream.

Add the following Telit LE910S1 composition:

0x9200: tty

Signed-off-by: Daniele Palmas dnlplm@gmail.com Link: https://lore.kernel.org/r/20211119140319.10448-1-dnlplm@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/serial/option.c | 2 ++ 1 file changed, 2 insertions(+)

--- a/drivers/usb/serial/option.c +++ b/drivers/usb/serial/option.c @@ -1267,6 +1267,8 @@ static const struct usb_device_id option .driver_info = NCTRL(2) }, { USB_DEVICE(TELIT_VENDOR_ID, 0x9010), /* Telit SBL FN980 flashing device */ .driver_info = NCTRL(0) | ZLP }, + { USB_DEVICE(TELIT_VENDOR_ID, 0x9200), /* Telit LE910S1 flashing device */ + .driver_info = NCTRL(0) | ZLP }, { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, ZTE_PRODUCT_MF622, 0xff, 0xff, 0xff) }, /* ZTE WCDMA products */ { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x0002, 0xff, 0xff, 0xff), .driver_info = RSVD(1) },

From: Minas Harutyunyan Minas.Harutyunyan@synopsys.com

commit 7ad4a0b1d46b2612f4429a72afd8f137d7efa9a9 upstream.

Added updating of request frame number for elapsed frames, otherwise frame number will remain as previous use of request. This will allow function driver to correctly track frames in case of Missed ISOC occurs.

Added setting request actual length to 0 for elapsed frames. In Slave mode when pushing data to RxFIFO by dwords, request actual length incrementing accordingly. But before whole packet will be pushed into RxFIFO and send to host can occurs Missed ISOC and data will not send to host. So, in this case request actual length should be reset to 0.

Fixes: 91bb163e1e4f ("usb: dwc2: gadget: Fix ISOC flow for BDMA and Slave") Cc: stable stable@vger.kernel.org Reviewed-by: John Keeping john@metanate.com Signed-off-by: Minas Harutyunyan Minas.Harutyunyan@synopsys.com Link: https://lore.kernel.org/r/c356baade6e9716d312d43df08d53ae557cb8037.163601127... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc2/gadget.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)

--- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -1198,6 +1198,8 @@ static void dwc2_hsotg_start_req(struct } ctrl |= DXEPCTL_CNAK; } else { + hs_req->req.frame_number = hs_ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, -ENODATA); return; } @@ -2856,9 +2858,12 @@ static void dwc2_gadget_handle_ep_disabl

do { hs_req = get_ep_head(hs_ep); - if (hs_req) + if (hs_req) { + hs_req->req.frame_number = hs_ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, -ENODATA); + } dwc2_gadget_incr_frame_num(hs_ep); /* Update current frame number value. */ hsotg->frame_number = dwc2_hsotg_read_frameno(hsotg); @@ -2911,8 +2916,11 @@ static void dwc2_gadget_handle_out_token

while (dwc2_gadget_target_frame_elapsed(ep)) { hs_req = get_ep_head(ep); - if (hs_req) + if (hs_req) { + hs_req->req.frame_number = ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, ep, hs_req, -ENODATA); + }

dwc2_gadget_incr_frame_num(ep); /* Update current frame number value. */ @@ -3001,8 +3009,11 @@ static void dwc2_gadget_handle_nak(struc

while (dwc2_gadget_target_frame_elapsed(hs_ep)) { hs_req = get_ep_head(hs_ep); - if (hs_req) + if (hs_req) { + hs_req->req.frame_number = hs_ep->target_frame; + hs_req->req.actual = 0; dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, -ENODATA); + }

dwc2_gadget_incr_frame_num(hs_ep); /* Update current frame number value. */

From: Thinh Nguyen Thinh.Nguyen@synopsys.com

commit d74dc3e9f58c28689cef1faccf918e06587367d3 upstream.

The End Transfer command from a stream endpoint will generate a NoStream event, and we should ignore it. Currently we set the flag DWC3_EP_IGNORE_NEXT_NOSTREAM to track this prior to sending the command, and it will be cleared on the next stream event. However, a stream event may be generated before the End Transfer command completion and prematurely clear the flag. Fix this by setting the flag on End Transfer completion instead.

Fixes: 140ca4cfea8a ("usb: dwc3: gadget: Handle stream transfers") Cc: stable@vger.kernel.org Signed-off-by: Thinh Nguyen Thinh.Nguyen@synopsys.com Link: https://lore.kernel.org/r/cee1253af4c3600edb878d11c9c08b040817ae23.163520397... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc3/gadget.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)

--- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3007,6 +3007,14 @@ static void dwc3_gadget_endpoint_command if (cmd != DWC3_DEPCMD_ENDTRANSFER) return;

+ /* + * The END_TRANSFER command will cause the controller to generate a + * NoStream Event, and it's not due to the host DP NoStream rejection. + * Ignore the next NoStream event. + */ + if (dep->stream_capable) + dep->flags |= DWC3_EP_IGNORE_NEXT_NOSTREAM; + dep->flags &= ~DWC3_EP_END_TRANSFER_PENDING; dep->flags &= ~DWC3_EP_TRANSFER_STARTED; dwc3_gadget_ep_cleanup_cancelled_requests(dep); @@ -3229,14 +3237,6 @@ static void dwc3_stop_active_transfer(st WARN_ON_ONCE(ret); dep->resource_index = 0;

- /* - * The END_TRANSFER command will cause the controller to generate a - * NoStream Event, and it's not due to the host DP NoStream rejection. - * Ignore the next NoStream event. - */ - if (dep->stream_capable) - dep->flags |= DWC3_EP_IGNORE_NEXT_NOSTREAM; - if (!interrupt) dep->flags &= ~DWC3_EP_TRANSFER_STARTED; else

From: Albert Wang albertccwang@google.com

commit 26288448120b28af1dfd85a6fa6b6d55a16c7f2f upstream.

In the endpoint interrupt functions dwc3_gadget_endpoint_transfer_in_progress() and dwc3_gadget_endpoint_trbs_complete() will dereference the endpoint descriptor. But it could be cleared in __dwc3_gadget_ep_disable() when accessory disconnected. So we need to check whether it is null or not before dereferencing it.

Fixes: f09ddcfcb8c5 ("usb: dwc3: gadget: Prevent EP queuing while stopping transfers") Cc: stable stable@vger.kernel.org Reviewed-by: Jack Pham quic_jackp@quicinc.com Signed-off-by: Albert Wang albertccwang@google.com Link: https://lore.kernel.org/r/20211109092642.3507692-1-albertccwang@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc3/gadget.c | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2918,6 +2918,9 @@ static bool dwc3_gadget_endpoint_trbs_co struct dwc3 *dwc = dep->dwc; bool no_started_trb = true;

+ if (!dep->endpoint.desc) + return no_started_trb; + dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);

if (dep->flags & DWC3_EP_END_TRANSFER_PENDING) @@ -2965,6 +2968,9 @@ static void dwc3_gadget_endpoint_transfe { int status = 0;

+ if (!dep->endpoint.desc) + return; + if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) dwc3_gadget_endpoint_frame_from_event(dep, event);

From: Dan Carpenter dan.carpenter@oracle.com

commit d4d2e5329ae9dfd6742c84d79f7d143d10410f1b upstream.

If the first call to devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0) fails with something other than -ENODEV then it leads to an error pointer dereference. For those errors we should just jump directly to the error handling.

Fixes: 8253a34bfae3 ("usb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle") Cc: stable stable@vger.kernel.org Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Link: https://lore.kernel.org/r/20211117074923.GF5237@kili Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/chipidea/ci_hdrc_imx.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)

--- a/drivers/usb/chipidea/ci_hdrc_imx.c +++ b/drivers/usb/chipidea/ci_hdrc_imx.c @@ -425,15 +425,15 @@ static int ci_hdrc_imx_probe(struct plat data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0); if (IS_ERR(data->phy)) { ret = PTR_ERR(data->phy); - if (ret == -ENODEV) { - data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0); - if (IS_ERR(data->phy)) { - ret = PTR_ERR(data->phy); - if (ret == -ENODEV) - data->phy = NULL; - else - goto err_clk; - } + if (ret != -ENODEV) + goto err_clk; + data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0); + if (IS_ERR(data->phy)) { + ret = PTR_ERR(data->phy); + if (ret == -ENODEV) + data->phy = NULL; + else + goto err_clk; } }

From: Mathias Nyman mathias.nyman@linux.intel.com

commit 6ae6dc22d2d1ce6aa77a6da8a761e61aca216f8b upstream.

xHC hardware can only have one slot in default state with address 0 waiting for a unique address at a time, otherwise "undefined behavior may occur" according to xhci spec 5.4.3.4

The address0_mutex exists to prevent this across both xhci roothubs.

If hub_port_init() fails, it may unlock the mutex and exit with a xhci slot in default state. If the other xhci roothub calls hub_port_init() at this point we end up with two slots in default state.

Make sure the address0_mutex protects the slot default state across hub_port_init() retries, until slot is addressed or disabled.

Note, one known minor case is not fixed by this patch. If device needs to be reset during resume, but fails all hub_port_init() retries in usb_reset_and_verify_device(), then it's possible the slot is still left in default state when address0_mutex is unlocked.

Cc: stable@vger.kernel.org Fixes: 638139eb95d2 ("usb: hub: allow to process more usb hub events in parallel") Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20211115221630.871204-1-mathias.nyman@linux.intel.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/core/hub.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)

--- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4628,8 +4628,6 @@ hub_port_init(struct usb_hub *hub, struc if (oldspeed == USB_SPEED_LOW) delay = HUB_LONG_RESET_TIME;

- mutex_lock(hcd->address0_mutex); - /* Reset the device; full speed may morph to high speed */ /* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */ retval = hub_port_reset(hub, port1, udev, delay, false); @@ -4940,7 +4938,6 @@ fail: hub_port_disable(hub, port1, 0); update_devnum(udev, devnum); /* for disconnect processing */ } - mutex_unlock(hcd->address0_mutex); return retval; }

@@ -5170,6 +5167,9 @@ static void hub_port_connect(struct usb_ unit_load = 100;

status = 0; + + mutex_lock(hcd->address0_mutex); + for (i = 0; i < PORT_INIT_TRIES; i++) {

/* reallocate for each attempt, since references @@ -5206,6 +5206,8 @@ static void hub_port_connect(struct usb_ if (status < 0) goto loop;

+ mutex_unlock(hcd->address0_mutex); + if (udev->quirks & USB_QUIRK_DELAY_INIT) msleep(2000);

@@ -5294,6 +5296,7 @@ static void hub_port_connect(struct usb_

loop_disable: hub_port_disable(hub, port1, 1); + mutex_lock(hcd->address0_mutex); loop: usb_ep0_reinit(udev); release_devnum(udev); @@ -5320,6 +5323,8 @@ loop: }

done: + mutex_unlock(hcd->address0_mutex); + hub_port_disable(hub, port1, 1); if (hcd->driver->relinquish_port && !hub->hdev->parent) { if (status != -ENOTCONN && status != -ENODEV) @@ -5839,6 +5844,8 @@ static int usb_reset_and_verify_device(s bos = udev->bos; udev->bos = NULL;

+ mutex_lock(hcd->address0_mutex); + for (i = 0; i < PORT_INIT_TRIES; ++i) {

/* ep0 maxpacket size may change; let the HCD know about it. @@ -5848,6 +5855,7 @@ static int usb_reset_and_verify_device(s if (ret >= 0 || ret == -ENOTCONN || ret == -ENODEV) break; } + mutex_unlock(hcd->address0_mutex);

if (ret < 0) goto re_enumerate;

From: Todd Kjos tkjos@google.com

commit c21a80ca0684ec2910344d72556c816cb8940c01 upstream.

This is a partial revert of commit 29bc22ac5e5b ("binder: use euid from cred instead of using task"). Setting sender_euid using proc->cred caused some Android system test regressions that need further investigation. It is a partial reversion because subsequent patches rely on proc->cred.

Fixes: 29bc22ac5e5b ("binder: use euid from cred instead of using task") Cc: stable@vger.kernel.org # 4.4+ Acked-by: Christian Brauner christian.brauner@ubuntu.com Signed-off-by: Todd Kjos tkjos@google.com Change-Id: I9b1769a3510fed250bb21859ef8beebabe034c66 Link: https://lore.kernel.org/r/20211112180720.2858135-1-tkjos@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/android/binder.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -3091,7 +3091,7 @@ static void binder_transaction(struct bi t->from = thread; else t->from = NULL; - t->sender_euid = proc->cred->euid; + t->sender_euid = task_euid(proc->tsk); t->to_proc = target_proc; t->to_thread = target_thread; t->code = tr->code;

From: Werner Sembach wse@tuxedocomputers.com

commit 174a7fb3859ae75b0f0e35ef852459d8882b55b5 upstream.

This applies a SND_PCI_QUIRK(...) to the ASRock NUC Box 1100 series. This fixes the issue of the headphone jack not being detected unless warm rebooted from a certain other OS.

When booting a certain other OS some coeff settings are changed that enable the audio jack. These settings are preserved on a warm reboot and can be easily dumped.

The relevant indexes and values where gathered by naively diff-ing and reading a working and a non-working coeff dump.

Signed-off-by: Werner Sembach wse@tuxedocomputers.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20211112110704.1022501-1-wse@tuxedocomputers.com Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/pci/hda/patch_realtek.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)

--- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -6467,6 +6467,27 @@ static void alc256_fixup_tongfang_reset_ alc_write_coef_idx(codec, 0x45, 0x5089); }

+static const struct coef_fw alc233_fixup_no_audio_jack_coefs[] = { + WRITE_COEF(0x1a, 0x9003), WRITE_COEF(0x1b, 0x0e2b), WRITE_COEF(0x37, 0xfe06), + WRITE_COEF(0x38, 0x4981), WRITE_COEF(0x45, 0xd489), WRITE_COEF(0x46, 0x0074), + WRITE_COEF(0x49, 0x0149), + {} +}; + +static void alc233_fixup_no_audio_jack(struct hda_codec *codec, + const struct hda_fixup *fix, + int action) +{ + /* + * The audio jack input and output is not detected on the ASRock NUC Box + * 1100 series when cold booting without this fix. Warm rebooting from a + * certain other OS makes the audio functional, as COEF settings are + * preserved in this case. This fix sets these altered COEF values as + * the default. + */ + alc_process_coef_fw(codec, alc233_fixup_no_audio_jack_coefs); +} + enum { ALC269_FIXUP_GPIO2, ALC269_FIXUP_SONY_VAIO, @@ -6685,6 +6706,7 @@ enum { ALC287_FIXUP_13S_GEN2_SPEAKERS, ALC256_FIXUP_TONGFANG_RESET_PERSISTENT_SETTINGS, ALC256_FIXUP_SYSTEM76_MIC_NO_PRESENCE, + ALC233_FIXUP_NO_AUDIO_JACK, };

static const struct hda_fixup alc269_fixups[] = { @@ -8399,6 +8421,10 @@ static const struct hda_fixup alc269_fix .chained = true, .chain_id = ALC269_FIXUP_HEADSET_MODE_NO_HP_MIC, }, + [ALC233_FIXUP_NO_AUDIO_JACK] = { + .type = HDA_FIXUP_FUNC, + .v.func = alc233_fixup_no_audio_jack, + }, };

static const struct snd_pci_quirk alc269_fixup_tbl[] = { @@ -8831,6 +8857,7 @@ static const struct snd_pci_quirk alc269 SND_PCI_QUIRK(0x17aa, 0x511e, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x511f, "Thinkpad", ALC298_FIXUP_TPT470_DOCK), SND_PCI_QUIRK(0x17aa, 0x9e54, "LENOVO NB", ALC269_FIXUP_LENOVO_EAPD), + SND_PCI_QUIRK(0x1849, 0x1233, "ASRock NUC Box 1100", ALC233_FIXUP_NO_AUDIO_JACK), SND_PCI_QUIRK(0x19e5, 0x3204, "Huawei MACH-WX9", ALC256_FIXUP_HUAWEI_MACH_WX9_PINS), SND_PCI_QUIRK(0x1b35, 0x1235, "CZC B20", ALC269_FIXUP_CZC_B20), SND_PCI_QUIRK(0x1b35, 0x1236, "CZC TMI", ALC269_FIXUP_CZC_TMI),

From: Hans Verkuil hverkuil-cisco@xs4all.nl

commit 13cbaa4c2b7bf9f8285e1164d005dbf08244ecd5 upstream.

When the reply for a non-blocking transmit arrives, the sequence field for that reply was never filled in, so userspace would have no way of associating the reply to the original transmit.

Copy the sequence field to ensure that this is now possible.

Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Fixes: 0dbacebede1e ([media] cec: move the CEC framework out of staging and to media) Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/cec/core/cec-adap.c | 1 + 1 file changed, 1 insertion(+)

--- a/drivers/media/cec/core/cec-adap.c +++ b/drivers/media/cec/core/cec-adap.c @@ -1199,6 +1199,7 @@ void cec_received_msg_ts(struct cec_adap if (abort) dst->rx_status |= CEC_RX_STATUS_FEATURE_ABORT; msg->flags = dst->flags; + msg->sequence = dst->sequence; /* Remove it from the wait_queue */ list_del_init(&data->list);

From: Jason Gerecke killertofu@gmail.com

commit 7fb0413baa7f8a04caef0c504df9af7e0623d296 upstream.

The HID descriptor of many of Wacom's touch input devices include a "Confidence" usage that signals if a particular touch collection contains useful data. The driver does not look at this flag, however, which causes even invalid contacts to be reported to userspace. A lucky combination of kernel event filtering and device behavior (specifically: contact ID 0 == invalid, contact ID >0 == valid; and order all data so that all valid contacts are reported before any invalid contacts) spare most devices from any visibly-bad behavior.

The DTH-2452 is one example of an unlucky device that misbehaves. It uses ID 0 for both the first valid contact and all invalid contacts. Because we report both the valid and invalid contacts, the kernel reports that contact 0 first goes down (valid) and then goes up (invalid) in every report. This causes ~100 clicks per second simply by touching the screen.

This patch inroduces new `confidence` flag in our `hid_data` structure. The value is initially set to `true` at the start of a report and can be set to `false` if an invalid touch usage is seen.

Link: https://github.com/linuxwacom/input-wacom/issues/270 Fixes: f8b6a74719b5 ("HID: wacom: generic: Support multiple tools per report") Signed-off-by: Jason Gerecke jason.gerecke@wacom.com Tested-by: Joshua Dickens joshua.dickens@wacom.com Cc: stable@vger.kernel.org Signed-off-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/hid/wacom_wac.c | 8 +++++++- drivers/hid/wacom_wac.h | 1 + 2 files changed, 8 insertions(+), 1 deletion(-)

--- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -2578,6 +2578,9 @@ static void wacom_wac_finger_event(struc return;

switch (equivalent_usage) { + case HID_DG_CONFIDENCE: + wacom_wac->hid_data.confidence = value; + break; case HID_GD_X: wacom_wac->hid_data.x = value; break; @@ -2610,7 +2613,8 @@ static void wacom_wac_finger_event(struc }

if (usage->usage_index + 1 == field->report_count) { - if (equivalent_usage == wacom_wac->hid_data.last_slot_field) + if (equivalent_usage == wacom_wac->hid_data.last_slot_field && + wacom_wac->hid_data.confidence) wacom_wac_finger_slot(wacom_wac, wacom_wac->touch_input); } } @@ -2625,6 +2629,8 @@ static void wacom_wac_finger_pre_report(

wacom_wac->is_invalid_bt_frame = false;

+ hid_data->confidence = true; + for (i = 0; i < report->maxfield; i++) { struct hid_field *field = report->field[i]; int j; --- a/drivers/hid/wacom_wac.h +++ b/drivers/hid/wacom_wac.h @@ -300,6 +300,7 @@ struct hid_data { bool tipswitch; bool barrelswitch; bool barrelswitch2; + bool confidence; int x; int y; int pressure;

From: Takashi Iwai tiwai@suse.de

commit ffcf7ae90f4489047d7b076539ba207024dea5f6 upstream.

snd_ctl_remove() has to be called with card->controls_rwsem held (when called after the card instantiation). This patch adds the missing rwsem calls around it.

Fixes: 510e340efe0c ("staging: greybus: audio: Add helper APIs for dynamic audio modules") Cc: stable stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Link: https://lore.kernel.org/r/20211116072027.18466-1-tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/staging/greybus/audio_helper.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/staging/greybus/audio_helper.c +++ b/drivers/staging/greybus/audio_helper.c @@ -192,7 +192,11 @@ int gbaudio_remove_component_controls(st unsigned int num_controls) { struct snd_card *card = component->card->snd_card; + int err;

- return gbaudio_remove_controls(card, component->dev, controls, - num_controls, component->name_prefix); + down_write(&card->controls_rwsem); + err = gbaudio_remove_controls(card, component->dev, controls, + num_controls, component->name_prefix); + up_write(&card->controls_rwsem); + return err; }

From: Miklos Szeredi mszeredi@redhat.com

commit 473441720c8616dfaf4451f9c7ea14f0eb5e5d65 upstream.

Checking buf->flags should be done before the pipe_buf_release() is called on the pipe buffer, since releasing the buffer might modify the flags.

This is exactly what page_cache_pipe_buf_release() does, and which results in the same VM_BUG_ON_PAGE(PageLRU(page)) that the original patch was trying to fix.

Reported-by: Justin Forbes jmforbes@linuxtx.org Fixes: 712a951025c0 ("fuse: fix page stealing") Cc: stable@vger.kernel.org # v2.6.35 Signed-off-by: Miklos Szeredi mszeredi@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/fuse/dev.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -851,17 +851,17 @@ static int fuse_try_move_page(struct fus goto out_put_old; }

+ get_page(newpage); + + if (!(buf->flags & PIPE_BUF_FLAG_LRU)) + lru_cache_add(newpage); + /* * Release while we have extra ref on stolen page. Otherwise * anon_pipe_buf_release() might think the page can be reused. */ pipe_buf_release(cs->pipe, buf);

- get_page(newpage); - - if (!(buf->flags & PIPE_BUF_FLAG_LRU)) - lru_cache_add(newpage); - err = 0; spin_lock(&cs->req->waitq.lock); if (test_bit(FR_ABORTED, &cs->req->flags))

From: Stefano Stabellini stefano.stabellini@xilinx.com

commit 36e8f60f0867d3b70d398d653c17108459a04efe upstream.

If the xenstore page hasn't been allocated properly, reading the value of the related hvm_param (HVM_PARAM_STORE_PFN) won't actually return error. Instead, it will succeed and return zero. Instead of attempting to xen_remap a bad guest physical address, detect this condition and return early.

Note that although a guest physical address of zero for HVM_PARAM_STORE_PFN is theoretically possible, it is not a good choice and zero has never been validly used in that capacity.

Also recognize all bits set as an invalid value.

For 32-bit Linux, any pfn above ULONG_MAX would get truncated. Pfns above ULONG_MAX should never be passed by the Xen tools to HVM guests anyway, so check for this condition and return early.

Cc: stable@vger.kernel.org Signed-off-by: Stefano Stabellini stefano.stabellini@xilinx.com Reviewed-by: Juergen Gross jgross@suse.com Reviewed-by: Jan Beulich jbeulich@suse.com Link: https://lore.kernel.org/r/20211123210748.1910236-1-sstabellini@kernel.org Signed-off-by: Boris Ostrovsky boris.ostrovsky@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/xen/xenbus/xenbus_probe.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)

--- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -886,6 +886,29 @@ static int __init xenbus_init(void) err = hvm_get_parameter(HVM_PARAM_STORE_PFN, &v); if (err) goto out_error; + /* + * Uninitialized hvm_params are zero and return no error. + * Although it is theoretically possible to have + * HVM_PARAM_STORE_PFN set to zero on purpose, in reality it is + * not zero when valid. If zero, it means that Xenstore hasn't + * been properly initialized. Instead of attempting to map a + * wrong guest physical address return error. + * + * Also recognize all bits set as an invalid value. + */ + if (!v || !~v) { + err = -ENOENT; + goto out_error; + } + /* Avoid truncation on 32-bit. */ +#if BITS_PER_LONG == 32 + if (v > ULONG_MAX) { + pr_err("%s: cannot handle HVM_PARAM_STORE_PFN=%llx > ULONG_MAX\n", + __func__, v); + err = -EINVAL; + goto out_error; + } +#endif xen_store_gfn = (unsigned long)v; xen_store_interface = xen_remap(xen_store_gfn << XEN_PAGE_SHIFT,

From: Jiri Olsa jolsa@redhat.com

commit 1880ed71ce863318c1ce93bf324876fb5f92854f upstream.

Add missing 'tu' variable initialization in the probes loop, otherwise the head 'tu' is used instead of added probes.

Link: https://lkml.kernel.org/r/20211123142801.182530-1-jolsa@kernel.org

Cc: stable@vger.kernel.org Fixes: 99c9a923e97a ("tracing/uprobe: Fix double perf_event linking on multiprobe uprobe") Acked-by: Masami Hiramatsu mhiramat@kernel.org Signed-off-by: Jiri Olsa jolsa@kernel.org Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/trace/trace_uprobe.c | 1 + 1 file changed, 1 insertion(+)

--- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -1312,6 +1312,7 @@ static int uprobe_perf_open(struct trace return 0;

list_for_each_entry(pos, trace_probe_probe_list(tp), list) { + tu = container_of(pos, struct trace_uprobe, tp); err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true); if (err) { uprobe_perf_close(call, event);

From: Tim Harvey tharvey@gateworks.com

commit adab993c25191b839b415781bdc7173a77315240 upstream.

On IMX SoC's which support CMDQ the following can occur during high a high cpu load:

mmc2: cqhci: ============ CQHCI REGISTER DUMP =========== mmc2: cqhci: Caps: 0x0000310a | Version: 0x00000510 mmc2: cqhci: Config: 0x00001001 | Control: 0x00000000 mmc2: cqhci: Int stat: 0x00000000 | Int enab: 0x00000006 mmc2: cqhci: Int sig: 0x00000006 | Int Coal: 0x00000000 mmc2: cqhci: TDL base: 0x8003f000 | TDL up32: 0x00000000 mmc2: cqhci: Doorbell: 0xbf01dfff | TCN: 0x00000000 mmc2: cqhci: Dev queue: 0x00000000 | Dev Pend: 0x08000000 mmc2: cqhci: Task clr: 0x00000000 | SSC1: 0x00011000 mmc2: cqhci: SSC2: 0x00000001 | DCMD rsp: 0x00000800 mmc2: cqhci: RED mask: 0xfdf9a080 | TERRI: 0x00000000 mmc2: cqhci: Resp idx: 0x0000000d | Resp arg: 0x00000000 mmc2: sdhci: ============ SDHCI REGISTER DUMP =========== mmc2: sdhci: Sys addr: 0x7c722000 | Version: 0x00000002 mmc2: sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000020 mmc2: sdhci: Argument: 0x00018000 | Trn mode: 0x00000023 mmc2: sdhci: Present: 0x01f88008 | Host ctl: 0x00000030 mmc2: sdhci: Power: 0x00000002 | Blk gap: 0x00000080 mmc2: sdhci: Wake-up: 0x00000008 | Clock: 0x0000000f mmc2: sdhci: Timeout: 0x0000008f | Int stat: 0x00000000 mmc2: sdhci: Int enab: 0x107f4000 | Sig enab: 0x107f4000 mmc2: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000502 mmc2: sdhci: Caps: 0x07eb0000 | Caps_1: 0x8000b407 mmc2: sdhci: Cmd: 0x00000d1a | Max curr: 0x00ffffff mmc2: sdhci: Resp[0]: 0x00000000 | Resp[1]: 0xffc003ff mmc2: sdhci: Resp[2]: 0x328f5903 | Resp[3]: 0x00d07f01 mmc2: sdhci: Host ctl2: 0x00000088 mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0xfe179020 mmc2: sdhci-esdhc-imx: ========= ESDHC IMX DEBUG STATUS DUMP ==== mmc2: sdhci-esdhc-imx: cmd debug status: 0x2120 mmc2: sdhci-esdhc-imx: data debug status: 0x2200 mmc2: sdhci-esdhc-imx: trans debug status: 0x2300 mmc2: sdhci-esdhc-imx: dma debug status: 0x2400 mmc2: sdhci-esdhc-imx: adma debug status: 0x2510 mmc2: sdhci-esdhc-imx: fifo debug status: 0x2680 mmc2: sdhci-esdhc-imx: async fifo debug status: 0x2750 mmc2: sdhci: ============================================

For now, disable CMDQ support on the imx8qm/imx8qxp/imx8mm until the issue is found and resolved.

Fixes: bb6e358169bf6 ("mmc: sdhci-esdhc-imx: add CMDQ support") Fixes: cde5e8e9ff146 ("mmc: sdhci-esdhc-imx: Add an new esdhc_soc_data for i.MX8MM") Cc: stable@vger.kernel.org Signed-off-by: Tim Harvey tharvey@gateworks.com Reviewed-by: Haibo Chen haibo.chen@nxp.com Acked-by: Adrian Hunter adrian.hunter@intel.com Link: https://lore.kernel.org/r/20211103165415.2016-1-tharvey@gateworks.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/host/sdhci-esdhc-imx.c | 2 -- 1 file changed, 2 deletions(-)

--- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -263,7 +263,6 @@ static struct esdhc_soc_data usdhc_imx8q .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES - | ESDHC_FLAG_CQHCI | ESDHC_FLAG_STATE_LOST_IN_LPMODE | ESDHC_FLAG_CLK_RATE_LOST_IN_PM_RUNTIME, }; @@ -272,7 +271,6 @@ static struct esdhc_soc_data usdhc_imx8m .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES - | ESDHC_FLAG_CQHCI | ESDHC_FLAG_STATE_LOST_IN_LPMODE, };

From: Dylan Hung dylan_hung@aspeedtech.com

commit 9dbe33cf371bd70330858370bdbc35c7668f00c3 upstream.

The issue happened randomly in runtime. The message "Link is Down" is popped but soon it recovered to "Link is Up".

The "Link is Down" results from the incorrect read data for reading the PHY register via MDIO bus. The correct sequence for reading the data shall be: 1. fire the command 2. wait for command done (this step was missing) 3. wait for data idle 4. read data from data register

Cc: stable@vger.kernel.org Fixes: f160e99462c6 ("net: phy: Add mdio-aspeed") Reviewed-by: Joel Stanley joel@jms.id.au Signed-off-by: Dylan Hung dylan_hung@aspeedtech.com Reviewed-by: Andrew Lunn andrew@lunn.ch Reviewed-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Link: https://lore.kernel.org/r/20211125024432.15809-1-dylan_hung@aspeedtech.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/mdio/mdio-aspeed.c | 7 +++++++ 1 file changed, 7 insertions(+)

--- a/drivers/net/mdio/mdio-aspeed.c +++ b/drivers/net/mdio/mdio-aspeed.c @@ -61,6 +61,13 @@ static int aspeed_mdio_read(struct mii_b

iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL);

+ rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl, + !(ctrl & ASPEED_MDIO_CTRL_FIRE), + ASPEED_MDIO_INTERVAL_US, + ASPEED_MDIO_TIMEOUT_US); + if (rc < 0) + return rc; + rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_DATA, data, data & ASPEED_MDIO_DATA_IDLE, ASPEED_MDIO_INTERVAL_US,

From: Marek Behún kabel@kernel.org

commit 67cb2a4c93499c2c22704998fd1fd2bc35194d8e upstream.

Avoid code repetition in advk_pcie_rd_conf() by handling errors with goto jump, as is customary in kernel.

Link: https://lore.kernel.org/r/20211005180952.6812-9-kabel@kernel.org Fixes: 43f5c77bcbd2 ("PCI: aardvark: Fix reporting CRS value") Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/pci-aardvark.c | 48 ++++++++++++++-------------------- 1 file changed, 20 insertions(+), 28 deletions(-)

--- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1090,18 +1090,8 @@ static int advk_pcie_rd_conf(struct pci_ (le16_to_cpu(pcie->bridge.pcie_conf.rootctl) & PCI_EXP_RTCTL_CRSSVE);

- if (advk_pcie_pio_is_running(pcie)) { - /* - * If it is possible return Completion Retry Status so caller - * tries to issue the request again instead of failing. - */ - if (allow_crs) { - *val = CFG_RD_CRS_VAL; - return PCIBIOS_SUCCESSFUL; - } - *val = 0xffffffff; - return PCIBIOS_SET_FAILED; - } + if (advk_pcie_pio_is_running(pcie)) + goto try_crs;

/* Program the control register */ reg = advk_readl(pcie, PIO_CTRL); @@ -1125,25 +1115,13 @@ static int advk_pcie_rd_conf(struct pci_ advk_writel(pcie, 1, PIO_START);

ret = advk_pcie_wait_pio(pcie); - if (ret < 0) { - /* - * If it is possible return Completion Retry Status so caller - * tries to issue the request again instead of failing. - */ - if (allow_crs) { - *val = CFG_RD_CRS_VAL; - return PCIBIOS_SUCCESSFUL; - } - *val = 0xffffffff; - return PCIBIOS_SET_FAILED; - } + if (ret < 0) + goto try_crs;

/* Check PIO status and get the read result */ ret = advk_pcie_check_pio_status(pcie, allow_crs, val); - if (ret < 0) { - *val = 0xffffffff; - return PCIBIOS_SET_FAILED; - } + if (ret < 0) + goto fail;

if (size == 1) *val = (*val >> (8 * (where & 3))) & 0xff; @@ -1151,6 +1129,20 @@ static int advk_pcie_rd_conf(struct pci_ *val = (*val >> (8 * (where & 3))) & 0xffff;

return PCIBIOS_SUCCESSFUL; + +try_crs: + /* + * If it is possible, return Completion Retry Status so that caller + * tries to issue the request again instead of failing. + */ + if (allow_crs) { + *val = CFG_RD_CRS_VAL; + return PCIBIOS_SUCCESSFUL; + } + +fail: + *val = 0xffffffff; + return PCIBIOS_SET_FAILED; }

static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn,

From: Pali Rohár pali@kernel.org

commit 223dec14a05337a4155f1deed46d2becce4d00fd upstream.

Commit 43f5c77bcbd2 ("PCI: aardvark: Fix reporting CRS value") fixed handling of CRS response and when CRSSVE flag was not enabled it marked CRS response as failed transaction (due to simplicity).

But pci-aardvark.c driver is already waiting up to the PIO_RETRY_CNT count for PIO config response and so we can with a small change implement re-issuing of config requests as described in PCIe base specification.

This change implements re-issuing of config requests when response is CRS. Set upper bound of wait cycles to around PIO_RETRY_CNT, afterwards the transaction is marked as failed and an all-ones value is returned as before.

We do this by returning appropriate error codes from function advk_pcie_check_pio_status(). On CRS we return -EAGAIN and caller then reissues transaction.

Link: https://lore.kernel.org/r/20211005180952.6812-10-kabel@kernel.org Signed-off-by: Pali Rohár pali@kernel.org Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Reviewed-by: Marek Behún kabel@kernel.org Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/pci-aardvark.c | 69 +++++++++++++++++++++------------- 1 file changed, 44 insertions(+), 25 deletions(-)

--- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -699,6 +699,7 @@ static int advk_pcie_check_pio_status(st u32 reg; unsigned int status; char *strcomp_status, *str_posted; + int ret;

reg = advk_readl(pcie, PIO_STAT); status = (reg & PIO_COMPLETION_STATUS_MASK) >> @@ -723,6 +724,7 @@ static int advk_pcie_check_pio_status(st case PIO_COMPLETION_STATUS_OK: if (reg & PIO_ERR_STATUS) { strcomp_status = "COMP_ERR"; + ret = -EFAULT; break; } /* Get the read result */ @@ -730,9 +732,11 @@ static int advk_pcie_check_pio_status(st *val = advk_readl(pcie, PIO_RD_DATA); /* No error */ strcomp_status = NULL; + ret = 0; break; case PIO_COMPLETION_STATUS_UR: strcomp_status = "UR"; + ret = -EOPNOTSUPP; break; case PIO_COMPLETION_STATUS_CRS: if (allow_crs && val) { @@ -750,6 +754,7 @@ static int advk_pcie_check_pio_status(st */ *val = CFG_RD_CRS_VAL; strcomp_status = NULL; + ret = 0; break; } /* PCIe r4.0, sec 2.3.2, says: @@ -765,21 +770,24 @@ static int advk_pcie_check_pio_status(st * Request and taking appropriate action, e.g., complete the * Request to the host as a failed transaction. * - * To simplify implementation do not re-issue the Configuration - * Request and complete the Request as a failed transaction. + * So return -EAGAIN and caller (pci-aardvark.c driver) will + * re-issue request again up to the PIO_RETRY_CNT retries. */ strcomp_status = "CRS"; + ret = -EAGAIN; break; case PIO_COMPLETION_STATUS_CA: strcomp_status = "CA"; + ret = -ECANCELED; break; default: strcomp_status = "Unknown"; + ret = -EINVAL; break; }

if (!strcomp_status) - return 0; + return ret;

if (reg & PIO_NON_POSTED_REQ) str_posted = "Non-posted"; @@ -789,7 +797,7 @@ static int advk_pcie_check_pio_status(st dev_dbg(dev, "%s PIO Response Status: %s, %#x @ %#x\n", str_posted, strcomp_status, reg, advk_readl(pcie, PIO_ADDR_LS));

- return -EFAULT; + return ret; }

static int advk_pcie_wait_pio(struct advk_pcie *pcie) @@ -797,13 +805,13 @@ static int advk_pcie_wait_pio(struct adv struct device *dev = &pcie->pdev->dev; int i;

- for (i = 0; i < PIO_RETRY_CNT; i++) { + for (i = 1; i <= PIO_RETRY_CNT; i++) { u32 start, isr;

start = advk_readl(pcie, PIO_START); isr = advk_readl(pcie, PIO_ISR); if (!start && isr) - return 0; + return i; udelay(PIO_RETRY_DELAY); }

@@ -1075,6 +1083,7 @@ static int advk_pcie_rd_conf(struct pci_ int where, int size, u32 *val) { struct advk_pcie *pcie = bus->sysdata; + int retry_count; bool allow_crs; u32 reg; int ret; @@ -1117,16 +1126,22 @@ static int advk_pcie_rd_conf(struct pci_ /* Program the data strobe */ advk_writel(pcie, 0xf, PIO_WR_DATA_STRB);

- /* Clear PIO DONE ISR and start the transfer */ - advk_writel(pcie, 1, PIO_ISR); - advk_writel(pcie, 1, PIO_START); - - ret = advk_pcie_wait_pio(pcie); - if (ret < 0) - goto try_crs; + retry_count = 0; + do { + /* Clear PIO DONE ISR and start the transfer */ + advk_writel(pcie, 1, PIO_ISR); + advk_writel(pcie, 1, PIO_START); + + ret = advk_pcie_wait_pio(pcie); + if (ret < 0) + goto try_crs; + + retry_count += ret; + + /* Check PIO status and get the read result */ + ret = advk_pcie_check_pio_status(pcie, allow_crs, val); + } while (ret == -EAGAIN && retry_count < PIO_RETRY_CNT);

- /* Check PIO status and get the read result */ - ret = advk_pcie_check_pio_status(pcie, allow_crs, val); if (ret < 0) goto fail;

@@ -1158,6 +1173,7 @@ static int advk_pcie_wr_conf(struct pci_ struct advk_pcie *pcie = bus->sysdata; u32 reg; u32 data_strobe = 0x0; + int retry_count; int offset; int ret;

@@ -1199,19 +1215,22 @@ static int advk_pcie_wr_conf(struct pci_ /* Program the data strobe */ advk_writel(pcie, data_strobe, PIO_WR_DATA_STRB);

- /* Clear PIO DONE ISR and start the transfer */ - advk_writel(pcie, 1, PIO_ISR); - advk_writel(pcie, 1, PIO_START); + retry_count = 0; + do { + /* Clear PIO DONE ISR and start the transfer */ + advk_writel(pcie, 1, PIO_ISR); + advk_writel(pcie, 1, PIO_START); + + ret = advk_pcie_wait_pio(pcie); + if (ret < 0) + return PCIBIOS_SET_FAILED;

- ret = advk_pcie_wait_pio(pcie); - if (ret < 0) - return PCIBIOS_SET_FAILED; + retry_count += ret;

- ret = advk_pcie_check_pio_status(pcie, false, NULL); - if (ret < 0) - return PCIBIOS_SET_FAILED; + ret = advk_pcie_check_pio_status(pcie, false, NULL); + } while (ret == -EAGAIN && retry_count < PIO_RETRY_CNT);

- return PCIBIOS_SUCCESSFUL; + return ret < 0 ? PCIBIOS_SET_FAILED : PCIBIOS_SUCCESSFUL; }

static struct pci_ops advk_pcie_ops = {

From: Pali Rohár pali@kernel.org

commit f76b36d40beee0a13aa8f6aa011df0d7cbbb8a7f upstream.

Fix multiple link training issues in aardvark driver. The main reason of these issues was misunderstanding of what certain registers do, since their names and comments were misleading: before commit 96be36dbffac ("PCI: aardvark: Replace custom macros by standard linux/pci_regs.h macros"), the pci-aardvark.c driver used custom macros for accessing standard PCIe Root Bridge registers, and misleading comments did not help to understand what the code was really doing.

After doing more tests and experiments I've come to the conclusion that the SPEED_GEN register in aardvark sets the PCIe revision / generation compliance and forces maximal link speed. Both GEN3 and GEN2 values set the read-only PCI_EXP_FLAGS_VERS bits (PCIe capabilities version of Root Bridge) to value 2, while GEN1 value sets PCI_EXP_FLAGS_VERS to 1, which matches with PCI Express specifications revisions 3, 2 and 1 respectively. Changing SPEED_GEN also sets the read-only bits PCI_EXP_LNKCAP_SLS and PCI_EXP_LNKCAP2_SLS to corresponding speed.

(Note that PCI Express rev 1 specification does not define PCI_EXP_LNKCAP2 and PCI_EXP_LNKCTL2 registers and when SPEED_GEN is set to GEN1 (which also sets PCI_EXP_FLAGS_VERS set to 1), lspci cannot access PCI_EXP_LNKCAP2 and PCI_EXP_LNKCTL2 registers.)

Changing PCIe link speed can be done via PCI_EXP_LNKCTL2_TLS bits of PCI_EXP_LNKCTL2 register. Armada 3700 Functional Specifications says that the default value of PCI_EXP_LNKCTL2_TLS is based on SPEED_GEN value, but tests showed that the default value is always 8.0 GT/s, independently of speed set by SPEED_GEN. So after setting SPEED_GEN, we must also set value in PCI_EXP_LNKCTL2 register via PCI_EXP_LNKCTL2_TLS bits.

Triggering PCI_EXP_LNKCTL_RL bit immediately after setting LINK_TRAINING_EN bit actually doesn't do anything. Tests have shown that a delay is needed after enabling LINK_TRAINING_EN bit. As triggering PCI_EXP_LNKCTL_RL currently does nothing, remove it.

Commit 43fc679ced18 ("PCI: aardvark: Improve link training") introduced code which sets SPEED_GEN register based on negotiated link speed from PCI_EXP_LNKSTA_CLS bits of PCI_EXP_LNKSTA register. This code was added to fix detection of Compex WLE900VX (Atheros QCA9880) WiFi GEN1 PCIe cards, as otherwise these cards were "invisible" on PCIe bus (probably because they crashed). But apparently more people reported the same issues with these cards also with other PCIe controllers [1] and I was able to reproduce this issue also with other "noname" WiFi cards based on Atheros QCA9890 chip (with the same PCI vendor/device ids as Atheros QCA9880). So this is not an issue in aardvark but rather an issue in Atheros QCA98xx chips. Also, this issue only exists if the kernel is compiled with PCIe ASPM support, and a generic workaround for this is to change PCIe Bridge to 2.5 GT/s link speed via PCI_EXP_LNKCTL2_TLS_2_5GT bits in PCI_EXP_LNKCTL2 register [2], before triggering PCI_EXP_LNKCTL_RL bit. This workaround also works when SPEED_GEN is set to value GEN2 (5 GT/s). So remove this hack completely in the aardvark driver and always set SPEED_GEN to value from 'max-link-speed' DT property. Fix for Atheros QCA98xx chips is handled separately by patch [2].

These two things (code for triggering PCI_EXP_LNKCTL_RL bit and changing SPEED_GEN value) also explain why commit 6964494582f5 ("PCI: aardvark: Train link immediately after enabling training") somehow fixed detection of those problematic Compex cards with Atheros chips: if triggering link retraining (via PCI_EXP_LNKCTL_RL bit) was done immediately after enabling link training (via LINK_TRAINING_EN), it did nothing. If there was a specific delay, aardvark HW already initialized PCIe link and therefore triggering link retraining caused the above issue. Compex cards triggered link down event and disappeared from the PCIe bus.

Commit f4c7d053d7f7 ("PCI: aardvark: Wait for endpoint to be ready before training link") added 100ms sleep before calling 'Start link training' command and explained that it is a requirement of PCI Express specification. But the code after this 100ms sleep was not doing 'Start link training', rather it triggered PCI_EXP_LNKCTL_RL bit via PCIe Root Bridge to put link into Recovery state.

The required delay after fundamental reset is already done in function advk_pcie_wait_for_link() which also checks whether PCIe link is up. So after removing the code which triggers PCI_EXP_LNKCTL_RL bit on PCIe Root Bridge, there is no need to wait 100ms again. Remove the extra msleep() call and update comment about the delay required by the PCI Express specification.

According to Marvell Armada 3700 Functional Specifications, Link training should be enabled via aardvark register LINK_TRAINING_EN after selecting PCIe generation and x1 lane. There is no need to disable it prior resetting card via PERST# signal. This disabling code was introduced in commit 5169a9851daa ("PCI: aardvark: Issue PERST via GPIO") as a workaround for some Atheros cards. It turns out that this also is Atheros specific issue and affects any PCIe controller, not only aardvark. Moreover this Atheros issue was triggered by juggling with PCI_EXP_LNKCTL_RL, LINK_TRAINING_EN and SPEED_GEN bits interleaved with sleeps. Now, after removing triggering PCI_EXP_LNKCTL_RL, there is no need to explicitly disable LINK_TRAINING_EN bit. So remove this code too. The problematic Compex cards described in previous git commits are correctly detected in advk_pcie_train_link() function even after applying all these changes.

Note that with this patch, and also prior this patch, some NVMe disks which support PCIe GEN3 with 8 GT/s speed are negotiated only at the lowest link speed 2.5 GT/s, independently of SPEED_GEN value. After manually triggering PCI_EXP_LNKCTL_RL bit (e.g. from userspace via setpci), these NVMe disks change link speed to 5 GT/s when SPEED_GEN was configured to GEN2. This issue first needs to be properly investigated. I will send a fix in the future.

On the other hand, some other GEN2 PCIe cards with 5 GT/s speed are autonomously by HW autonegotiated at full 5 GT/s speed without need of any software interaction.

Armada 3700 Functional Specifications describes the following steps for link training: set SPEED_GEN to GEN2, enable LINK_TRAINING_EN, poll until link training is complete, trigger PCI_EXP_LNKCTL_RL, poll until signal rate is 5 GT/s, poll until link training is complete, enable ASPM L0s.

The requirement for triggering PCI_EXP_LNKCTL_RL can be explained by the need to achieve 5 GT/s speed (as changing link speed is done by throw to recovery state entered by PCI_EXP_LNKCTL_RL) or maybe as a part of enabling ASPM L0s (but in this case ASPM L0s should have been enabled prior PCI_EXP_LNKCTL_RL).

It is unknown why the original pci-aardvark.c driver was triggering PCI_EXP_LNKCTL_RL bit before waiting for the link to be up. This does not align with neither PCIe base specifications nor with Armada 3700 Functional Specification. (Note that in older versions of aardvark, this bit was called incorrectly PCIE_CORE_LINK_TRAINING, so this may be the reason.)

It is also unknown why Armada 3700 Functional Specification says that it is needed to trigger PCI_EXP_LNKCTL_RL for GEN2 mode, as according to PCIe base specification 5 GT/s speed negotiation is supposed to be entirely autonomous, even if initial speed is 2.5 GT/s.

[1] - https://lore.kernel.org/linux-pci/87h7l8axqp.fsf@toke.dk/ [2] - https://lore.kernel.org/linux-pci/20210326124326.21163-1-pali@kernel.org/

Link: https://lore.kernel.org/r/20211005180952.6812-12-kabel@kernel.org Signed-off-by: Pali Rohár pali@kernel.org Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Reviewed-by: Marek Behún kabel@kernel.org Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/pci-aardvark.c | 119 ++++++++++------------------------ 1 file changed, 35 insertions(+), 84 deletions(-)

--- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -306,11 +306,6 @@ static inline u32 advk_readl(struct advk return readl(pcie->base + reg); }

-static inline u16 advk_read16(struct advk_pcie *pcie, u64 reg) -{ - return advk_readl(pcie, (reg & ~0x3)) >> ((reg & 0x3) * 8); -} - static u8 advk_pcie_ltssm_state(struct advk_pcie *pcie) { u32 val; @@ -384,23 +379,9 @@ static void advk_pcie_wait_for_retrain(s

static void advk_pcie_issue_perst(struct advk_pcie *pcie) { - u32 reg; - if (!pcie->reset_gpio) return;

- /* - * As required by PCI Express spec (PCI Express Base Specification, REV. - * 4.0 PCI Express, February 19 2014, 6.6.1 Conventional Reset) a delay - * for at least 100ms after de-asserting PERST# signal is needed before - * link training is enabled. So ensure that link training is disabled - * prior de-asserting PERST# signal to fulfill that PCI Express spec - * requirement. - */ - reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG); - reg &= ~LINK_TRAINING_EN; - advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG); - /* 10ms delay is needed for some cards */ dev_info(&pcie->pdev->dev, "issuing PERST via reset GPIO for 10ms\n"); gpiod_set_value_cansleep(pcie->reset_gpio, 1); @@ -408,54 +389,47 @@ static void advk_pcie_issue_perst(struct gpiod_set_value_cansleep(pcie->reset_gpio, 0); }

-static int advk_pcie_train_at_gen(struct advk_pcie *pcie, int gen) +static void advk_pcie_train_link(struct advk_pcie *pcie) { - int ret, neg_gen; + struct device *dev = &pcie->pdev->dev; u32 reg; + int ret;

- /* Setup link speed */ + /* + * Setup PCIe rev / gen compliance based on device tree property + * 'max-link-speed' which also forces maximal link speed. + */ reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG); reg &= ~PCIE_GEN_SEL_MSK; - if (gen == 3) + if (pcie->link_gen == 3) reg |= SPEED_GEN_3; - else if (gen == 2) + else if (pcie->link_gen == 2) reg |= SPEED_GEN_2; else reg |= SPEED_GEN_1; advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);

/* - * Enable link training. This is not needed in every call to this - * function, just once suffices, but it does not break anything either. - */ + * Set maximal link speed value also into PCIe Link Control 2 register. + * Armada 3700 Functional Specification says that default value is based + * on SPEED_GEN but tests showed that default value is always 8.0 GT/s. + */ + reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL2); + reg &= ~PCI_EXP_LNKCTL2_TLS; + if (pcie->link_gen == 3) + reg |= PCI_EXP_LNKCTL2_TLS_8_0GT; + else if (pcie->link_gen == 2) + reg |= PCI_EXP_LNKCTL2_TLS_5_0GT; + else + reg |= PCI_EXP_LNKCTL2_TLS_2_5GT; + advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL2); + + /* Enable link training after selecting PCIe generation */ reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG); reg |= LINK_TRAINING_EN; advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);

/* - * Start link training immediately after enabling it. - * This solves problems for some buggy cards. - */ - reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL); - reg |= PCI_EXP_LNKCTL_RL; - advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL); - - ret = advk_pcie_wait_for_link(pcie); - if (ret) - return ret; - - reg = advk_read16(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKSTA); - neg_gen = reg & PCI_EXP_LNKSTA_CLS; - - return neg_gen; -} - -static void advk_pcie_train_link(struct advk_pcie *pcie) -{ - struct device *dev = &pcie->pdev->dev; - int neg_gen = -1, gen; - - /* * Reset PCIe card via PERST# signal. Some cards are not detected * during link training when they are in some non-initial state. */ @@ -465,41 +439,18 @@ static void advk_pcie_train_link(struct * PERST# signal could have been asserted by pinctrl subsystem before * probe() callback has been called or issued explicitly by reset gpio * function advk_pcie_issue_perst(), making the endpoint going into - * fundamental reset. As required by PCI Express spec a delay for at - * least 100ms after such a reset before link training is needed. - */ - msleep(PCI_PM_D3COLD_WAIT); - - /* - * Try link training at link gen specified by device tree property - * 'max-link-speed'. If this fails, iteratively train at lower gen. - */ - for (gen = pcie->link_gen; gen > 0; --gen) { - neg_gen = advk_pcie_train_at_gen(pcie, gen); - if (neg_gen > 0) - break; - } - - if (neg_gen < 0) - goto err; - - /* - * After successful training if negotiated gen is lower than requested, - * train again on negotiated gen. This solves some stability issues for - * some buggy gen1 cards. + * fundamental reset. As required by PCI Express spec (PCI Express + * Base Specification, REV. 4.0 PCI Express, February 19 2014, 6.6.1 + * Conventional Reset) a delay for at least 100ms after such a reset + * before sending a Configuration Request to the device is needed. + * So wait until PCIe link is up. Function advk_pcie_wait_for_link() + * waits for link at least 900ms. */ - if (neg_gen < gen) { - gen = neg_gen; - neg_gen = advk_pcie_train_at_gen(pcie, gen); - } - - if (neg_gen == gen) { - dev_info(dev, "link up at gen %i\n", gen); - return; - } - -err: - dev_err(dev, "link never came up\n"); + ret = advk_pcie_wait_for_link(pcie); + if (ret < 0) + dev_err(dev, "link never came up\n"); + else + dev_info(dev, "link up\n"); }

/*

From: Florent Fourcot florent.fourcot@wifirst.fr

[ Upstream commit ad81d4daf6a3f4769a346e635d5e1e967ca455d9 ]

filter->orig_flags was used for a reply context.

Fixes: cb8aa9a3affb ("netfilter: ctnetlink: add kernel side filtering for dump") Signed-off-by: Florent Fourcot florent.fourcot@wifirst.fr Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nf_conntrack_netlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index cb4cfa4f61a8d..39e0ff41688a7 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -973,7 +973,7 @@ ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family) CTA_TUPLE_REPLY, filter->family, &filter->zone, - filter->orig_flags); + filter->reply_flags); if (err < 0) { err = -EINVAL; goto err_filter;

From: yangxingwu xingwu.yang@gmail.com

[ Upstream commit c95c07836fa4c1767ed11d8eca0769c652760e32 ]

We are changing expire_nodest_conn to work even for reused connections when conn_reuse_mode=0, just as what was done with commit dc7b3eb900aa ("ipvs: Fix reuse connection if real server is dead").

For controlled and persistent connections, the new connection will get the needed real server depending on the rules in ip_vs_check_template().

Fixes: d752c3645717 ("ipvs: allow rescheduling of new connections when port reuse is detected") Co-developed-by: Chuanqi Liu legend050709@qq.com Signed-off-by: Chuanqi Liu legend050709@qq.com Signed-off-by: yangxingwu xingwu.yang@gmail.com Acked-by: Simon Horman horms@verge.net.au Acked-by: Julian Anastasov ja@ssi.bg Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- Documentation/networking/ipvs-sysctl.rst | 3 +-- net/netfilter/ipvs/ip_vs_core.c | 8 ++++---- 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/Documentation/networking/ipvs-sysctl.rst b/Documentation/networking/ipvs-sysctl.rst index 2afccc63856ee..1cfbf1add2fc9 100644 --- a/Documentation/networking/ipvs-sysctl.rst +++ b/Documentation/networking/ipvs-sysctl.rst @@ -37,8 +37,7 @@ conn_reuse_mode - INTEGER

0: disable any special handling on port reuse. The new connection will be delivered to the same real server that was - servicing the previous connection. This will effectively - disable expire_nodest_conn. + servicing the previous connection.

bit 1: enable rescheduling of new connections when it is safe. That is, whenever expire_nodest_conn and for TCP sockets, when diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c index c0b8215ab3d47..3a76da58d88bb 100644 --- a/net/netfilter/ipvs/ip_vs_core.c +++ b/net/netfilter/ipvs/ip_vs_core.c @@ -1976,7 +1976,6 @@ ip_vs_in(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, int struct ip_vs_proto_data *pd; struct ip_vs_conn *cp; int ret, pkts; - int conn_reuse_mode; struct sock *sk;

/* Already marked as IPVS request or reply? */ @@ -2053,15 +2052,16 @@ ip_vs_in(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, int cp = INDIRECT_CALL_1(pp->conn_in_get, ip_vs_conn_in_get_proto, ipvs, af, skb, &iph);

- conn_reuse_mode = sysctl_conn_reuse_mode(ipvs); - if (conn_reuse_mode && !iph.fragoffs && is_new_conn(skb, &iph) && cp) { + if (!iph.fragoffs && is_new_conn(skb, &iph) && cp) { + int conn_reuse_mode = sysctl_conn_reuse_mode(ipvs); bool old_ct = false, resched = false;

if (unlikely(sysctl_expire_nodest_conn(ipvs)) && cp->dest && unlikely(!atomic_read(&cp->dest->weight))) { resched = true; old_ct = ip_vs_conn_uses_old_conntrack(cp, skb); - } else if (is_new_conn_expected(cp, conn_reuse_mode)) { + } else if (conn_reuse_mode && + is_new_conn_expected(cp, conn_reuse_mode)) { old_ct = ip_vs_conn_uses_old_conntrack(cp, skb); if (!atomic_read(&cp->n_control)) { resched = true;

From: Florian Fainelli f.fainelli@gmail.com

[ Upstream commit 754c4050a00e802e122690112fc2c3a6abafa7e2 ]

The I2C interrupt controller line is off by 32 because the datasheet describes interrupt inputs into the GIC which are for Shared Peripheral Interrupts and are starting at offset 32. The ARM GIC binding expects the SPI interrupts to be numbered from 0 relative to the SPI base.

Fixes: bb097e3e0045 ("ARM: dts: BCM5301X: Add I2C support to the DT") Tested-by: Christian Lamparter chunkeey@gmail.com Signed-off-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/bcm5301x.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/bcm5301x.dtsi b/arch/arm/boot/dts/bcm5301x.dtsi index 72b0df6910bd5..e97a9c0904a98 100644 --- a/arch/arm/boot/dts/bcm5301x.dtsi +++ b/arch/arm/boot/dts/bcm5301x.dtsi @@ -408,7 +408,7 @@ uart2: serial@18008000 { i2c0: i2c@18009000 { compatible = "brcm,iproc-i2c"; reg = <0x18009000 0x50>; - interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>; + interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>; #address-cells = <1>; #size-cells = <0>; clock-frequency = <100000>;

From: Florian Fainelli f.fainelli@gmail.com

[ Upstream commit 98481f3d72fb88cb5b973153434061015f094925 ]

The PCIe host bridge has two interrupt lines, one that goes towards it PCIE_INTR2 second level interrupt controller and one for its MSI second level interrupt controller. The first interrupt line is not currently managed by the driver, which is why it was not a functional problem.

The interrupt-map property was also only listing the PCI_INTA interrupts when there are also the INTB, C and D.

Reported-by: Jim Quinlan jim2101024@gmail.com Fixes: d5c8dc0d4c88 ("ARM: dts: bcm2711: Enable PCIe controller") Signed-off-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/bcm2711.dtsi | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi index 398ecd7b9b68b..4ade854bdcdaf 100644 --- a/arch/arm/boot/dts/bcm2711.dtsi +++ b/arch/arm/boot/dts/bcm2711.dtsi @@ -480,11 +480,17 @@ pcie0: pcie@7d500000 { #address-cells = <3>; #interrupt-cells = <1>; #size-cells = <2>; - interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>, + interrupts = <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>; interrupt-names = "pcie", "msi"; interrupt-map-mask = <0x0 0x0 0x0 0x7>; interrupt-map = <0 0 0 1 &gicv2 GIC_SPI 143 + IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 2 &gicv2 GIC_SPI 144 + IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 3 &gicv2 GIC_SPI 145 + IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 4 &gicv2 GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>; msi-controller; msi-parent = <&pcie0>;

From: Srinivas Kandagatla srinivas.kandagatla@linaro.org

[ Upstream commit 721a94b4352dc8e47bff90b549a0118c39776756 ]

Error handling in q6asm_dai_prepare() seems to be completely broken, Fix this by handling it properly.

Fixes: 2a9e92d371db ("ASoC: qdsp6: q6asm: Add q6asm dai driver") Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Link: https://lore.kernel.org/r/20211116114721.12517-4-srinivas.kandagatla@linaro.... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/qcom/qdsp6/q6asm-dai.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c index 9766725c29166..84cf190aa01a6 100644 --- a/sound/soc/qcom/qdsp6/q6asm-dai.c +++ b/sound/soc/qcom/qdsp6/q6asm-dai.c @@ -269,9 +269,7 @@ static int q6asm_dai_prepare(struct snd_soc_component *component,

if (ret < 0) { dev_err(dev, "%s: q6asm_open_write failed\n", __func__); - q6asm_audio_client_free(prtd->audio_client); - prtd->audio_client = NULL; - return -ENOMEM; + goto open_err; }

prtd->session_id = q6asm_get_session_id(prtd->audio_client); @@ -279,7 +277,7 @@ static int q6asm_dai_prepare(struct snd_soc_component *component, prtd->session_id, substream->stream); if (ret) { dev_err(dev, "%s: stream reg failed ret:%d\n", __func__, ret); - return ret; + goto routing_err; }

if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { @@ -301,10 +299,19 @@ static int q6asm_dai_prepare(struct snd_soc_component *component, } if (ret < 0) dev_info(dev, "%s: CMD Format block failed\n", __func__); + else + prtd->state = Q6ASM_STREAM_RUNNING;

- prtd->state = Q6ASM_STREAM_RUNNING; + return ret;

- return 0; +routing_err: + q6asm_cmd(prtd->audio_client, prtd->stream_id, CMD_CLOSE); +open_err: + q6asm_unmap_memory_regions(substream->stream, prtd->audio_client); + q6asm_audio_client_free(prtd->audio_client); + prtd->audio_client = NULL; + + return ret; }

static int q6asm_dai_trigger(struct snd_soc_component *component,

From: Srinivas Kandagatla srinivas.kandagatla@linaro.org

[ Upstream commit 006ea27c4e7037369085755c7b5389effa508c04 ]

Error returned from wcd934x_slim_set_hw_params() are not passed to upper layer, this could be misleading to the user which can start sending stream leading to unnecessary errors.

Fix this by properly returning the errors.

Fixes: a61f3b4f476e ("ASoC: wcd934x: add support to wcd9340/wcd9341 codec") Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Link: https://lore.kernel.org/r/20211116114623.11891-3-srinivas.kandagatla@linaro.... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/wcd934x.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sound/soc/codecs/wcd934x.c b/sound/soc/codecs/wcd934x.c index d18ae5e3ee809..699b59cd389c0 100644 --- a/sound/soc/codecs/wcd934x.c +++ b/sound/soc/codecs/wcd934x.c @@ -1812,9 +1812,8 @@ static int wcd934x_hw_params(struct snd_pcm_substream *substream, }

wcd->dai[dai->id].sconfig.rate = params_rate(params); - wcd934x_slim_set_hw_params(wcd, &wcd->dai[dai->id], substream->stream);

- return 0; + return wcd934x_slim_set_hw_params(wcd, &wcd->dai[dai->id], substream->stream); }

static int wcd934x_hw_free(struct snd_pcm_substream *substream,

From: Peng Fan peng.fan@nxp.com

[ Upstream commit 1446fc6c678e8d8b31606a4b877abe205f344b38 ]

of_genpd_add_provider_onecell may return error, so let's propagate its return value to caller

Link: https://lore.kernel.org/r/20211116064227.20571-1-peng.fan@oss.nxp.com Fixes: 898216c97ed2 ("firmware: arm_scmi: add device power domain support using genpd") Signed-off-by: Peng Fan peng.fan@nxp.com Signed-off-by: Sudeep Holla sudeep.holla@arm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/firmware/arm_scmi/scmi_pm_domain.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/firmware/arm_scmi/scmi_pm_domain.c b/drivers/firmware/arm_scmi/scmi_pm_domain.c index 9e44479f02842..a4e4aa9a35426 100644 --- a/drivers/firmware/arm_scmi/scmi_pm_domain.c +++ b/drivers/firmware/arm_scmi/scmi_pm_domain.c @@ -106,9 +106,7 @@ static int scmi_pm_domain_probe(struct scmi_device *sdev) scmi_pd_data->domains = domains; scmi_pd_data->num_domains = num_domains;

- of_genpd_add_provider_onecell(np, scmi_pd_data); - - return 0; + return of_genpd_add_provider_onecell(np, scmi_pd_data); }

static const struct scmi_device_id scmi_id_table[] = {

From: Takashi Iwai tiwai@suse.de

[ Upstream commit 187bea472600dcc8d2eb714335053264dd437172 ]

When CONFIG_FORTIFY_SOURCE is set, memcpy() checks the potential buffer overflow and panics. The code in sofcpga bootstrapping contains the memcpy() calls are mistakenly translated as the shorter size, hence it triggers a panic as if it were overflowing.

This patch changes the secondary_trampoline and *_end definitions to arrays for avoiding the false-positive crash above.

Fixes: 9c4566a117a6 ("ARM: socfpga: Enable SMP for socfpga") Suggested-by: Kees Cook keescook@chromium.org Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1192473 Link: https://lore.kernel.org/r/20211117193244.31162-1-tiwai@suse.de Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Dinh Nguyen dinguyen@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/mach-socfpga/core.h | 2 +- arch/arm/mach-socfpga/platsmp.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-socfpga/core.h b/arch/arm/mach-socfpga/core.h index fc2608b18a0d0..18f01190dcfd4 100644 --- a/arch/arm/mach-socfpga/core.h +++ b/arch/arm/mach-socfpga/core.h @@ -33,7 +33,7 @@ extern void __iomem *sdr_ctl_base_addr; u32 socfpga_sdram_self_refresh(u32 sdr_base); extern unsigned int socfpga_sdram_self_refresh_sz;

-extern char secondary_trampoline, secondary_trampoline_end; +extern char secondary_trampoline[], secondary_trampoline_end[];

extern unsigned long socfpga_cpu1start_addr;

diff --git a/arch/arm/mach-socfpga/platsmp.c b/arch/arm/mach-socfpga/platsmp.c index fbb80b883e5dd..201191cf68f32 100644 --- a/arch/arm/mach-socfpga/platsmp.c +++ b/arch/arm/mach-socfpga/platsmp.c @@ -20,14 +20,14 @@

static int socfpga_boot_secondary(unsigned int cpu, struct task_struct *idle) { - int trampoline_size = &secondary_trampoline_end - &secondary_trampoline; + int trampoline_size = secondary_trampoline_end - secondary_trampoline;

if (socfpga_cpu1start_addr) { /* This will put CPU #1 into reset. */ writel(RSTMGR_MPUMODRST_CPU1, rst_manager_base_addr + SOCFPGA_RSTMGR_MODMPURST);

- memcpy(phys_to_virt(0), &secondary_trampoline, trampoline_size); + memcpy(phys_to_virt(0), secondary_trampoline, trampoline_size);

writel(__pa_symbol(secondary_startup), sys_manager_base_addr + (socfpga_cpu1start_addr & 0x000000ff)); @@ -45,12 +45,12 @@ static int socfpga_boot_secondary(unsigned int cpu, struct task_struct *idle)

static int socfpga_a10_boot_secondary(unsigned int cpu, struct task_struct *idle) { - int trampoline_size = &secondary_trampoline_end - &secondary_trampoline; + int trampoline_size = secondary_trampoline_end - secondary_trampoline;

if (socfpga_cpu1start_addr) { writel(RSTMGR_MPUMODRST_CPU1, rst_manager_base_addr + SOCFPGA_A10_RSTMGR_MODMPURST); - memcpy(phys_to_virt(0), &secondary_trampoline, trampoline_size); + memcpy(phys_to_virt(0), secondary_trampoline, trampoline_size);

writel(__pa_symbol(secondary_startup), sys_manager_base_addr + (socfpga_cpu1start_addr & 0x00000fff));

From: Sreekanth Reddy sreekanth.reddy@broadcom.com

[ Upstream commit 0ee4ba13e09c9d9c1cb6abb59da8295d9952328b ]

While looping over shost's sdev list it is possible that one of the drives is getting removed and its sas_target object is freed but its sdev object remains intact.

Consequently, a kernel panic can occur while the driver is trying to access the sas_address field of sas_target object without also checking the sas_target object for NULL.

Link: https://lore.kernel.org/r/20211117104909.2069-1-sreekanth.reddy@broadcom.com Fixes: f92363d12359 ("[SCSI] mpt3sas: add new driver supporting 12GB SAS") Signed-off-by: Sreekanth Reddy sreekanth.reddy@broadcom.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/mpt3sas/mpt3sas_scsih.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index 31c384108bc9c..8418b59b3743b 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -3675,7 +3675,7 @@ _scsih_ublock_io_device(struct MPT3SAS_ADAPTER *ioc, u64 sas_address)

shost_for_each_device(sdev, ioc->shost) { sas_device_priv_data = sdev->hostdata; - if (!sas_device_priv_data) + if (!sas_device_priv_data || !sas_device_priv_data->sas_target) continue; if (sas_device_priv_data->sas_target->sas_address != sas_address)

From: Volodymyr Mytnyk vmytnyk@marvell.com

[ Upstream commit e8d032507cb7912baf1d3e0af54516f823befefd ]

fix error path handling in prestera_bridge_port_join() that cases prestera driver to crash (see below).

Trace: Internal error: Oops: 96000044 [#1] SMP Modules linked in: prestera_pci prestera uio_pdrv_genirq CPU: 1 PID: 881 Comm: ip Not tainted 5.15.0 #1 pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : prestera_bridge_destroy+0x2c/0xb0 [prestera] lr : prestera_bridge_port_join+0x2cc/0x350 [prestera] sp : ffff800011a1b0f0 ... x2 : ffff000109ca6c80 x1 : dead000000000100 x0 : dead000000000122 Call trace: prestera_bridge_destroy+0x2c/0xb0 [prestera] prestera_bridge_port_join+0x2cc/0x350 [prestera] prestera_netdev_port_event.constprop.0+0x3c4/0x450 [prestera] prestera_netdev_event_handler+0xf4/0x110 [prestera] raw_notifier_call_chain+0x54/0x80 call_netdevice_notifiers_info+0x54/0xa0 __netdev_upper_dev_link+0x19c/0x380

Fixes: e1189d9a5fbe ("net: marvell: prestera: Add Switchdev driver implementation") Signed-off-by: Volodymyr Mytnyk vmytnyk@marvell.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/marvell/prestera/prestera_switchdev.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c b/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c index 7d83e1f91ef17..9101d00e96b9d 100644 --- a/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c +++ b/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c @@ -439,8 +439,8 @@ static int prestera_port_bridge_join(struct prestera_port *port,

br_port = prestera_bridge_port_add(bridge, port->dev); if (IS_ERR(br_port)) { - err = PTR_ERR(br_port); - goto err_brport_create; + prestera_bridge_put(bridge); + return PTR_ERR(br_port); }

if (bridge->vlan_enabled) @@ -454,8 +454,6 @@ static int prestera_port_bridge_join(struct prestera_port *port,

err_port_join: prestera_bridge_port_put(br_port); -err_brport_create: - prestera_bridge_put(bridge); return err; }

From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com

[ Upstream commit fa9730b4f28b7bd183d28a0bf636ab7108de35d7 ]

These devices are based on an I2C/I2S device, we need to force the use of the SOF driver otherwise the legacy HDaudio driver will be loaded - only HDMI will be supported.

We previously added support for other Intel platforms but missed JasperLake.

BugLink: https://github.com/thesofproject/linux/issues/3210 Fixes: 9d36ceab9415 ('ALSA: intel-dsp-config: add quirk for APL/GLK/TGL devices based on ES8336 codec') Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Kai Vehmanen kai.vehmanen@intel.com Signed-off-by: Bard Liao yung-chuan.liao@linux.intel.com Link: https://lore.kernel.org/r/20211027023254.24955-1-yung-chuan.liao@linux.intel... Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- sound/hda/intel-dsp-config.c | 9 +++++++++ 1 file changed, 9 insertions(+)

diff --git a/sound/hda/intel-dsp-config.c b/sound/hda/intel-dsp-config.c index 6cdb3db7507b1..fc61571a3ac73 100644 --- a/sound/hda/intel-dsp-config.c +++ b/sound/hda/intel-dsp-config.c @@ -298,6 +298,15 @@ static const struct config_entry config_table[] = { }, #endif

+/* JasperLake */ +#if IS_ENABLED(CONFIG_SND_SOC_SOF_JASPERLAKE) + { + .flags = FLAG_SOF, + .device = 0x4dc8, + .codec_hid = "ESSX8336", + }, +#endif + /* Tigerlake */ #if IS_ENABLED(CONFIG_SND_SOC_SOF_TIGERLAKE) {

From: Michael Kelley mikelley@microsoft.com

[ Upstream commit e95d8eaee21cd0d117d34125d4cdc97489c1ab82 ]

The ARCH_FEATURES function ID is a 32-bit SMC call, which returns a 32-bit result per the SMCCC spec. Current code is doing a 64-bit comparison against -1 (SMCCC_RET_NOT_SUPPORTED) to detect that the feature is unimplemented. That check doesn't work in a Hyper-V VM, where the upper 32-bits are zero as allowed by the spec.

Cast the result as an 'int' so the comparison works. The change also makes the code consistent with other similar checks in this file.

Fixes: 821b67fa4639 ("firmware: smccc: Add ARCH_SOC_ID support") Signed-off-by: Michael Kelley mikelley@microsoft.com Reviewed-by: Sudeep Holla sudeep.holla@arm.com Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/firmware/smccc/soc_id.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/smccc/soc_id.c b/drivers/firmware/smccc/soc_id.c index 581aa5e9b0778..dd7c3d5e8b0bb 100644 --- a/drivers/firmware/smccc/soc_id.c +++ b/drivers/firmware/smccc/soc_id.c @@ -50,7 +50,7 @@ static int __init smccc_soc_init(void) arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID, ARM_SMCCC_ARCH_SOC_ID, &res);

- if (res.a0 == SMCCC_RET_NOT_SUPPORTED) { + if ((int)res.a0 == SMCCC_RET_NOT_SUPPORTED) { pr_info("ARCH_SOC_ID not implemented, skipping ....\n"); return 0; }

From: Diana Wang na.wang@corigine.com

[ Upstream commit 3bd6b2a838ba6a3b86d41b077f570b1b61174def ]

Use nn->tlv_caps.me_freq_mhz instead of nn->me_freq_mhz to check whether rx-usecs/tx-usecs is valid.

This is because nn->tlv_caps.me_freq_mhz represents the clock_freq (MHz) of the flow processing cores (FPC) on the NIC. While nn->me_freq_mhz is not be set.

Fixes: ce991ab6662a ("nfp: read ME frequency from vNIC ctrl memory") Signed-off-by: Diana Wang na.wang@corigine.com Signed-off-by: Simon Horman simon.horman@corigine.com Reviewed-by: Jakub Kicinski kuba@kernel.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/netronome/nfp/nfp_net.h | 3 --- drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c | 2 +- 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index df5b748be068c..cc2ce452000a3 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -557,7 +557,6 @@ struct nfp_net_dp { * @exn_name: Name for Exception interrupt * @shared_handler: Handler for shared interrupts * @shared_name: Name for shared interrupt - * @me_freq_mhz: ME clock_freq (MHz) * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active, * @reconfig_sync_present and HW reconfiguration request * regs/machinery from async requests (sync must take @@ -640,8 +639,6 @@ struct nfp_net { irq_handler_t shared_handler; char shared_name[IFNAMSIZ + 8];

- u32 me_freq_mhz; - bool link_up; spinlock_t link_status_lock;

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c index c036a1d0f8de6..cd0c9623f7dd2 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -1347,7 +1347,7 @@ static int nfp_net_set_coalesce(struct net_device *netdev, * ME timestamp ticks. There are 16 ME clock cycles for each timestamp * count. */ - factor = nn->me_freq_mhz / 16; + factor = nn->tlv_caps.me_freq_mhz / 16;

/* Each pair of (usecs, max_frames) fields specifies that interrupts * should be coalesced until

From: Holger Assmann h.assmann@pengutronix.de

[ Upstream commit a6da2bbb0005e6b4909472962c9d0af29e75dd06 ]

Currently, when user space emits SIOCSHWTSTAMP ioctl calls such as enabling/disabling timestamping or changing filter settings, the driver reads the current CLOCK_REALTIME value and programming this into the NIC's hardware clock. This might be necessary during system initialization, but at runtime, when the PTP clock has already been synchronized to a grandmaster, a reset of the timestamp settings might result in a clock jump. Furthermore, if the clock is also controlled by phc2sys in automatic mode (where the UTC offset is queried from ptp4l), that UTC-to-TAI offset (currently 37 seconds in 2021) would be temporarily reset to 0, and it would take a long time for phc2sys to readjust so that CLOCK_REALTIME and the PHC are apart by 37 seconds again.

To address the issue, we introduce a new function called stmmac_init_tstamp_counter(), which gets called during ndo_open(). It contains the code snippet moved from stmmac_hwtstamp_set() that manages the time synchronization. Besides, the sub second increment configuration is also moved here since the related values are hardware dependent and runtime invariant.

Furthermore, the hardware clock must be kept running even when no time stamping mode is selected in order to retain the synchronized time base. That way, timestamping can be enabled again at any time only with the need to compensate the clock's natural drifting.

As a side effect, this patch fixes the issue that ptp_clock_info::enable can be called before SIOCSHWTSTAMP and the driver (which looks at priv->systime_flags) was not prepared to handle that ordering.

Fixes: 92ba6888510c ("stmmac: add the support for PTP hw clock driver") Reported-by: Michael Olbrich m.olbrich@pengutronix.de Signed-off-by: Ahmad Fatoum a.fatoum@pengutronix.de Signed-off-by: Holger Assmann h.assmann@pengutronix.de Signed-off-by: Vladimir Oltean vladimir.oltean@nxp.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/stmicro/stmmac/stmmac.h | 1 + .../net/ethernet/stmicro/stmmac/stmmac_main.c | 125 +++++++++++------- .../ethernet/stmicro/stmmac/stmmac_platform.c | 2 +- 3 files changed, 81 insertions(+), 47 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index a4ca283e02284..617c960cfb5a5 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -258,6 +258,7 @@ int stmmac_mdio_register(struct net_device *ndev); int stmmac_mdio_reset(struct mii_bus *mii); void stmmac_set_ethtool_ops(struct net_device *netdev);

+int stmmac_init_tstamp_counter(struct stmmac_priv *priv, u32 systime_flags); void stmmac_ptp_register(struct stmmac_priv *priv); void stmmac_ptp_unregister(struct stmmac_priv *priv); int stmmac_resume(struct device *dev); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index b6a2bc020026a..a8c5492cb39be 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -47,6 +47,13 @@ #include "dwxgmac2.h" #include "hwif.h"

+/* As long as the interface is active, we keep the timestamping counter enabled + * with fine resolution and binary rollover. This avoid non-monotonic behavior + * (clock jumps) when changing timestamping settings at runtime. + */ +#define STMMAC_HWTS_ACTIVE (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | \ + PTP_TCR_TSCTRLSSR) + #define STMMAC_ALIGN(x) ALIGN(ALIGN(x, SMP_CACHE_BYTES), 16) #define TSO_MAX_BUFF_SIZE (SZ_16K - 1)

@@ -508,8 +515,6 @@ static int stmmac_hwtstamp_set(struct net_device *dev, struct ifreq *ifr) { struct stmmac_priv *priv = netdev_priv(dev); struct hwtstamp_config config; - struct timespec64 now; - u64 temp = 0; u32 ptp_v2 = 0; u32 tstamp_all = 0; u32 ptp_over_ipv4_udp = 0; @@ -518,11 +523,6 @@ static int stmmac_hwtstamp_set(struct net_device *dev, struct ifreq *ifr) u32 snap_type_sel = 0; u32 ts_master_en = 0; u32 ts_event_en = 0; - u32 sec_inc = 0; - u32 value = 0; - bool xmac; - - xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac;

if (!(priv->dma_cap.time_stamp || priv->adv_ts)) { netdev_alert(priv->dev, "No support for HW time stamping\n"); @@ -684,42 +684,17 @@ static int stmmac_hwtstamp_set(struct net_device *dev, struct ifreq *ifr) priv->hwts_rx_en = ((config.rx_filter == HWTSTAMP_FILTER_NONE) ? 0 : 1); priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON;

- if (!priv->hwts_tx_en && !priv->hwts_rx_en) - stmmac_config_hw_tstamping(priv, priv->ptpaddr, 0); - else { - value = (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | PTP_TCR_TSCTRLSSR | - tstamp_all | ptp_v2 | ptp_over_ethernet | - ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en | - ts_master_en | snap_type_sel); - stmmac_config_hw_tstamping(priv, priv->ptpaddr, value); - - /* program Sub Second Increment reg */ - stmmac_config_sub_second_increment(priv, - priv->ptpaddr, priv->plat->clk_ptp_rate, - xmac, &sec_inc); - temp = div_u64(1000000000ULL, sec_inc); - - /* Store sub second increment and flags for later use */ - priv->sub_second_inc = sec_inc; - priv->systime_flags = value; - - /* calculate default added value: - * formula is : - * addend = (2^32)/freq_div_ratio; - * where, freq_div_ratio = 1e9ns/sec_inc - */ - temp = (u64)(temp << 32); - priv->default_addend = div_u64(temp, priv->plat->clk_ptp_rate); - stmmac_config_addend(priv, priv->ptpaddr, priv->default_addend); - - /* initialize system time */ - ktime_get_real_ts64(&now); + priv->systime_flags = STMMAC_HWTS_ACTIVE;

- /* lower 32 bits of tv_sec are safe until y2106 */ - stmmac_init_systime(priv, priv->ptpaddr, - (u32)now.tv_sec, now.tv_nsec); + if (priv->hwts_tx_en || priv->hwts_rx_en) { + priv->systime_flags |= tstamp_all | ptp_v2 | + ptp_over_ethernet | ptp_over_ipv6_udp | + ptp_over_ipv4_udp | ts_event_en | + ts_master_en | snap_type_sel; }

+ stmmac_config_hw_tstamping(priv, priv->ptpaddr, priv->systime_flags); + memcpy(&priv->tstamp_config, &config, sizeof(config));

return copy_to_user(ifr->ifr_data, &config, @@ -747,6 +722,66 @@ static int stmmac_hwtstamp_get(struct net_device *dev, struct ifreq *ifr) sizeof(*config)) ? -EFAULT : 0; }

+/** + * stmmac_init_tstamp_counter - init hardware timestamping counter + * @priv: driver private structure + * @systime_flags: timestamping flags + * Description: + * Initialize hardware counter for packet timestamping. + * This is valid as long as the interface is open and not suspended. + * Will be rerun after resuming from suspend, case in which the timestamping + * flags updated by stmmac_hwtstamp_set() also need to be restored. + */ +int stmmac_init_tstamp_counter(struct stmmac_priv *priv, u32 systime_flags) +{ + bool xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; + struct timespec64 now; + u32 sec_inc = 0; + u64 temp = 0; + int ret; + + if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp)) + return -EOPNOTSUPP; + + ret = clk_prepare_enable(priv->plat->clk_ptp_ref); + if (ret < 0) { + netdev_warn(priv->dev, + "failed to enable PTP reference clock: %pe\n", + ERR_PTR(ret)); + return ret; + } + + stmmac_config_hw_tstamping(priv, priv->ptpaddr, systime_flags); + priv->systime_flags = systime_flags; + + /* program Sub Second Increment reg */ + stmmac_config_sub_second_increment(priv, priv->ptpaddr, + priv->plat->clk_ptp_rate, + xmac, &sec_inc); + temp = div_u64(1000000000ULL, sec_inc); + + /* Store sub second increment for later use */ + priv->sub_second_inc = sec_inc; + + /* calculate default added value: + * formula is : + * addend = (2^32)/freq_div_ratio; + * where, freq_div_ratio = 1e9ns/sec_inc + */ + temp = (u64)(temp << 32); + priv->default_addend = div_u64(temp, priv->plat->clk_ptp_rate); + stmmac_config_addend(priv, priv->ptpaddr, priv->default_addend); + + /* initialize system time */ + ktime_get_real_ts64(&now); + + /* lower 32 bits of tv_sec are safe until y2106 */ + stmmac_init_systime(priv, priv->ptpaddr, (u32)now.tv_sec, now.tv_nsec); + + return 0; +} +EXPORT_SYMBOL_GPL(stmmac_init_tstamp_counter); + /** * stmmac_init_ptp - init PTP * @priv: driver private structure @@ -757,9 +792,11 @@ static int stmmac_hwtstamp_get(struct net_device *dev, struct ifreq *ifr) static int stmmac_init_ptp(struct stmmac_priv *priv) { bool xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; + int ret;

- if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp)) - return -EOPNOTSUPP; + ret = stmmac_init_tstamp_counter(priv, STMMAC_HWTS_ACTIVE); + if (ret) + return ret;

priv->adv_ts = 0; /* Check if adv_ts can be enabled for dwmac 4.x / xgmac core */ @@ -2721,10 +2758,6 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) stmmac_mmc_setup(priv);

if (init_ptp) { - ret = clk_prepare_enable(priv->plat->clk_ptp_ref); - if (ret < 0) - netdev_warn(priv->dev, "failed to enable PTP reference clock: %d\n", ret); - ret = stmmac_init_ptp(priv); if (ret == -EOPNOTSUPP) netdev_warn(priv->dev, "PTP not supported by HW\n"); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 5c9d29c42bac8..4387752b26d95 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -815,7 +815,7 @@ static int stmmac_pltfr_noirq_resume(struct device *dev) if (ret) return ret;

- clk_prepare_enable(priv->plat->clk_ptp_ref); + stmmac_init_tstamp_counter(priv, priv->systime_flags); }

return 0;

From: Nikolay Aleksandrov nikolay@nvidia.com

[ Upstream commit 1005f19b9357b81aa64e1decd08d6e332caaa284 ]

When replacing a nexthop group, we must release the IPv6 per-cpu dsts of the removed nexthop entries after an RCU grace period because they contain references to the nexthop's net device and to the fib6 info. With specific series of events[1] we can reach net device refcount imbalance which is unrecoverable. IPv4 is not affected because dsts don't take a refcount on the route.

[1] $ ip nexthop list id 200 via 2002:db8::2 dev bridge.10 scope link onlink id 201 via 2002:db8::3 dev bridge scope link onlink id 203 group 201/200 $ ip -6 route 2001:db8::10 nhid 203 metric 1024 pref medium nexthop via 2002:db8::3 dev bridge weight 1 onlink nexthop via 2002:db8::2 dev bridge.10 weight 1 onlink

Create rt6_info through one of the multipath legs, e.g.: $ taskset -a -c 1 ./pkt_inj 24 bridge.10 2001:db8::10 (pkt_inj is just a custom packet generator, nothing special)

Then remove that leg from the group by replace (let's assume it is id 200 in this case): $ ip nexthop replace id 203 group 201

Now remove the IPv6 route: $ ip -6 route del 2001:db8::10/128

The route won't be really deleted due to the stale rt6_info holding 1 refcnt in nexthop id 200. At this point we have the following reference count dependency: (deleted) IPv6 route holds 1 reference over nhid 203 nh 203 holds 1 ref over id 201 nh 200 holds 1 ref over the net device and the route due to the stale rt6_info

Now to create circular dependency between nh 200 and the IPv6 route, and also to get a reference over nh 200, restore nhid 200 in the group: $ ip nexthop replace id 203 group 201/200

And now we have a permanent circular dependncy because nhid 203 holds a reference over nh 200 and 201, but the route holds a ref over nh 203 and is deleted.

To trigger the bug just delete the group (nhid 203): $ ip nexthop del id 203

It won't really be deleted due to the IPv6 route dependency, and now we have 2 unlinked and deleted objects that reference each other: the group and the IPv6 route. Since the group drops the reference it holds over its entries at free time (i.e. its own refcount needs to drop to 0) that will never happen and we get a permanent ref on them, since one of the entries holds a reference over the IPv6 route it will also never be released.

At this point the dependencies are: (deleted, only unlinked) IPv6 route holds reference over group nh 203 (deleted, only unlinked) group nh 203 holds reference over nh 201 and 200 nh 200 holds 1 ref over the net device and the route due to the stale rt6_info

This is the last point where it can be fixed by running traffic through nh 200, and specifically through the same CPU so the rt6_info (dst) will get released due to the IPv6 genid, that in turn will free the IPv6 route, which in turn will free the ref count over the group nh 203.

If nh 200 is deleted at this point, it will never be released due to the ref from the unlinked group 203, it will only be unlinked: $ ip nexthop del id 200 $ ip nexthop $

Now we can never release that stale rt6_info, we have IPv6 route with ref over group nh 203, group nh 203 with ref over nh 200 and 201, nh 200 with rt6_info (dst) with ref over the net device and the IPv6 route. All of these objects are only unlinked, and cannot be released, thus they can't release their ref counts.

Message from syslogd@dev at Nov 19 14:04:10 ... kernel:[73501.828730] unregister_netdevice: waiting for bridge.10 to become free. Usage count = 3 Message from syslogd@dev at Nov 19 14:04:20 ... kernel:[73512.068811] unregister_netdevice: waiting for bridge.10 to become free. Usage count = 3

Fixes: 7bf4796dd099 ("nexthops: add support for replace") Signed-off-by: Nikolay Aleksandrov nikolay@nvidia.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/nexthop.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 4dbc628f8c386..8bd3f5e3c0e7a 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -924,15 +924,36 @@ static void remove_nexthop(struct net *net, struct nexthop *nh, /* if any FIB entries reference this nexthop, any dst entries * need to be regenerated */ -static void nh_rt_cache_flush(struct net *net, struct nexthop *nh) +static void nh_rt_cache_flush(struct net *net, struct nexthop *nh, + struct nexthop *replaced_nh) { struct fib6_info *f6i; + struct nh_group *nhg; + int i;

if (!list_empty(&nh->fi_list)) rt_cache_flush(net);

list_for_each_entry(f6i, &nh->f6i_list, nh_list) ipv6_stub->fib6_update_sernum(net, f6i); + + /* if an IPv6 group was replaced, we have to release all old + * dsts to make sure all refcounts are released + */ + if (!replaced_nh->is_group) + return; + + /* new dsts must use only the new nexthop group */ + synchronize_net(); + + nhg = rtnl_dereference(replaced_nh->nh_grp); + for (i = 0; i < nhg->num_nh; i++) { + struct nh_grp_entry *nhge = &nhg->nh_entries[i]; + struct nh_info *nhi = rtnl_dereference(nhge->nh->nh_info); + + if (nhi->family == AF_INET6) + ipv6_stub->fib6_nh_release_dsts(&nhi->fib6_nh); + } }

static int replace_nexthop_grp(struct net *net, struct nexthop *old, @@ -1111,7 +1132,7 @@ static int replace_nexthop(struct net *net, struct nexthop *old, err = replace_nexthop_single(net, old, new, extack);

if (!err) { - nh_rt_cache_flush(net, old); + nh_rt_cache_flush(net, old, new);

__remove_nexthop(net, new, NULL); nexthop_put(new);

From: Marta Plantykow marta.a.plantykow@intel.com

[ Upstream commit f65ee535df775a13a1046c0a0b2d72db342f8a5b ]

Ice driver has the routines for managing XDP resources that are shared between ndo_bpf op and VSI rebuild flow. The latter takes place for example when user changes queue count on an interface via ethtool's set_channels().

There is an issue around the bpf_prog refcounting when VSI is being rebuilt - since ice_prepare_xdp_rings() is called with vsi->xdp_prog as an argument that is used later on by ice_vsi_assign_bpf_prog(), same bpf_prog pointers are swapped with each other. Then it is also interpreted as an 'old_prog' which in turn causes us to call bpf_prog_put on it that will decrement its refcount.

Below splat can be interpreted in a way that due to zero refcount of a bpf_prog it is wiped out from the system while kernel still tries to refer to it:

[ 481.069429] BUG: unable to handle page fault for address: ffffc9000640f038 [ 481.077390] #PF: supervisor read access in kernel mode [ 481.083335] #PF: error_code(0x0000) - not-present page [ 481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0 [ 481.097141] Oops: 0000 [#1] PREEMPT SMP PTI [ 481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G OE 5.15.0-rc5+ #1 [ 481.110840] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016 [ 481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40 [ 481.127265] Code: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 <48> 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84 [ 481.148991] RSP: 0018:ffffc90007b63868 EFLAGS: 00010286 [ 481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000 [ 481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000 [ 481.171527] RBP: ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0 [ 481.179776] R10: 0000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc [ 481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 481.196276] FS: 00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000 [ 481.205633] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0 [ 481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 481.228771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 481.237029] Call Trace: [ 481.239856] rtnl_fill_ifinfo+0x768/0x12e0 [ 481.244602] rtnl_dump_ifinfo+0x525/0x650 [ 481.249246] ? __alloc_skb+0xa5/0x280 [ 481.253484] netlink_dump+0x168/0x3c0 [ 481.257725] netlink_recvmsg+0x21e/0x3e0 [ 481.262263] ____sys_recvmsg+0x87/0x170 [ 481.266707] ? __might_fault+0x20/0x30 [ 481.271046] ? _copy_from_user+0x66/0xa0 [ 481.275591] ? iovec_from_user+0xf6/0x1c0 [ 481.280226] ___sys_recvmsg+0x82/0x100 [ 481.284566] ? sock_sendmsg+0x5e/0x60 [ 481.288791] ? __sys_sendto+0xee/0x150 [ 481.293129] __sys_recvmsg+0x56/0xa0 [ 481.297267] do_syscall_64+0x3b/0xc0 [ 481.301395] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 481.307238] RIP: 0033:0x7f5466f39617 [ 481.311373] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 000000000000002f [ 481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617 [ 481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 0000000000000003 [ 481.398500] RBP: 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50 [ 481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: 00007ffedc7f5360 [ 481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98 [ 481.451520] Modules linked in: ice(OE) af_packet binfmt_misc nls_iso8859_1 ipmi_ssif intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp mxm_wmi mei_me coretemp mei ipmi_si ipmi_msghandler wmi acpi_pad acpi_power_meter ip_tables x_tables autofs4 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel ahci crypto_simd cryptd libahci lpc_ich [last unloaded: ice] [ 481.528558] CR2: ffffc9000640f038 [ 481.542041] ---[ end trace d1f24c9ecf5b61c1 ]---

Fix this by only calling ice_vsi_assign_bpf_prog() inside ice_prepare_xdp_rings() when current vsi->xdp_prog pointer is NULL. This way set_channels() flow will not attempt to swap the vsi->xdp_prog pointers with itself.

Also, sprinkle around some comments that provide a reasoning about correlation between driver and kernel in terms of bpf_prog refcount.

Fixes: efc2214b6047 ("ice: Add support for XDP") Reviewed-by: Alexander Lobakin alexandr.lobakin@intel.com Signed-off-by: Marta Plantykow marta.a.plantykow@intel.com Co-developed-by: Maciej Fijalkowski maciej.fijalkowski@intel.com Signed-off-by: Maciej Fijalkowski maciej.fijalkowski@intel.com Tested-by: Kiran Bhandare kiranx.bhandare@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/ice/ice_main.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index 5b67d24b2b5ed..746a5bd178d3b 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -2397,7 +2397,18 @@ int ice_prepare_xdp_rings(struct ice_vsi *vsi, struct bpf_prog *prog) ice_stat_str(status)); goto clear_xdp_rings; } - ice_vsi_assign_bpf_prog(vsi, prog); + + /* assign the prog only when it's not already present on VSI; + * this flow is a subject of both ethtool -L and ndo_bpf flows; + * VSI rebuild that happens under ethtool -L can expose us to + * the bpf_prog refcount issues as we would be swapping same + * bpf_prog pointers from vsi->xdp_prog and calling bpf_prog_put + * on it as it would be treated as an 'old_prog'; for ndo_bpf + * this is not harmful as dev_xdp_install bumps the refcount + * before calling the op exposed by the driver; + */ + if (!ice_is_xdp_ena_vsi(vsi)) + ice_vsi_assign_bpf_prog(vsi, prog);

return 0; clear_xdp_rings: @@ -2527,6 +2538,11 @@ ice_xdp_setup_prog(struct ice_vsi *vsi, struct bpf_prog *prog, if (xdp_ring_err) NL_SET_ERR_MSG_MOD(extack, "Freeing XDP Tx resources failed"); } else { + /* safe to call even when prog == vsi->xdp_prog as + * dev_xdp_install in net/core/dev.c incremented prog's + * refcount so corresponding bpf_prog_put won't cause + * underflow + */ ice_vsi_assign_bpf_prog(vsi, prog); }

From: Shin'ichiro Kawasaki shinichiro.kawasaki@wdc.com

[ Upstream commit 2d62253eb1b60f4ce8b39125eee282739b519297 ]

When a reset is requested the position of the write pointer is updated but the data in the corresponding zone is not cleared. Instead scsi_debug returns any data written before the write pointer was reset. This is an error and prevents using scsi_debug for stale page cache testing of the BLKRESETZONE ioctl.

Zero written data in the zone when resetting the write pointer.

Link: https://lore.kernel.org/r/20211122061223.298890-1-shinichiro.kawasaki@wdc.co... Fixes: f0d1cf9378bd ("scsi: scsi_debug: Add ZBC zone commands") Reviewed-by: Damien Le Moal damien.lemoal@opensource.wdc.com Acked-by: Douglas Gilbert dgilbert@interlog.com Signed-off-by: Shin'ichiro Kawasaki shinichiro.kawasaki@wdc.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/scsi_debug.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 3fc7c2a31c191..1a3f5adc68849 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4628,6 +4628,7 @@ static void zbc_rwp_zone(struct sdebug_dev_info *devip, struct sdeb_zone_state *zsp) { enum sdebug_z_cond zc; + struct sdeb_store_info *sip = devip2sip(devip, false);

if (zbc_zone_is_conv(zsp)) return; @@ -4639,6 +4640,10 @@ static void zbc_rwp_zone(struct sdebug_dev_info *devip, if (zsp->z_cond == ZC4_CLOSED) devip->nr_closed--;

+ if (zsp->z_wp > zsp->z_start) + memset(sip->storep + zsp->z_start * sdebug_sector_size, 0, + (zsp->z_wp - zsp->z_start) * sdebug_sector_size); + zsp->z_non_seq_resource = false; zsp->z_wp = zsp->z_start; zsp->z_cond = ZC1_EMPTY;

From: Tony Lu tonylu@linux.alibaba.com

[ Upstream commit 606a63c9783a32a45bd2ef0eee393711d75b3284 ]

The side that actively closed socket, it's clcsock doesn't enter TIME_WAIT state, but the passive side does it. It should show the same behavior as TCP sockets.

Consider this, when client actively closes the socket, the clcsock in server enters TIME_WAIT state, which means the address is occupied and won't be reused before TIME_WAIT dismissing. If we restarted server, the service would be unavailable for a long time.

To solve this issue, shutdown the clcsock in [A], perform the TCP active close progress first, before the passive closed side closing it. So that the actively closed side enters TIME_WAIT, not the passive one.

Client | Server close() // client actively close | smc_release() | smc_close_active() // PEERCLOSEWAIT1 | smc_close_final() // abort or closed = 1| smc_cdc_get_slot_and_msg_send() | [A] | |smc_cdc_msg_recv_action() // ACTIVE | queue_work(smc_close_wq, &conn->close_work) | smc_close_passive_work() // PROCESSABORT or APPCLOSEWAIT1 | smc_close_passive_abort_received() // only in abort | |close() // server recv zero, close | smc_release() // PROCESSABORT or APPCLOSEWAIT1 | smc_close_active() | smc_close_abort() or smc_close_final() // CLOSED | smc_cdc_get_slot_and_msg_send() // abort or closed = 1 smc_cdc_msg_recv_action() | smc_clcsock_release() queue_work(smc_close_wq, &conn->close_work) | sock_release(tcp) // actively close clc, enter TIME_WAIT smc_close_passive_work() // PEERCLOSEWAIT1 | smc_conn_free() smc_close_passive_abort_received() // CLOSED| smc_conn_free() | smc_clcsock_release() | sock_release(tcp) // passive close clc |

Link: https://www.spinics.net/lists/netdev/msg780407.html Fixes: b38d732477e4 ("smc: socket closing and linkgroup cleanup") Signed-off-by: Tony Lu tonylu@linux.alibaba.com Reviewed-by: Wen Gu guwen@linux.alibaba.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/smc/smc_close.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c index 0f9ffba07d268..04620b53b74a7 100644 --- a/net/smc/smc_close.c +++ b/net/smc/smc_close.c @@ -228,6 +228,12 @@ int smc_close_active(struct smc_sock *smc) /* send close request */ rc = smc_close_final(conn); sk->sk_state = SMC_PEERCLOSEWAIT1; + + /* actively shutdown clcsock before peer close it, + * prevent peer from entering TIME_WAIT state. + */ + if (smc->clcsock && smc->clcsock->sk) + rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR); } else { /* peer event has changed the state */ goto again;

From: Amit Cohen amcohen@nvidia.com

[ Upstream commit 63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047 ]

When processing port up/down events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not the CPU port (local port 0), which exists, but lacks a netdev.

This can result in a NULL pointer dereference when calling netif_carrier_{on,off}().

Fix this by bailing early when processing an event reported for the CPU port. Problem was only observed when running on top of a buggy emulator.

Fixes: 28b1987ef506 ("mlxsw: spectrum: Register CPU port with devlink") Signed-off-by: Amit Cohen amcohen@nvidia.com Signed-off-by: Ido Schimmel idosch@nvidia.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 1a9978f501ba9..4110e15c22c79 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -2058,7 +2058,7 @@ static void mlxsw_sp_pude_event_func(const struct mlxsw_reg_info *reg, max_ports = mlxsw_core_max_ports(mlxsw_sp->core); local_port = mlxsw_reg_pude_local_port_get(pude_pl);

- if (WARN_ON_ONCE(local_port >= max_ports)) + if (WARN_ON_ONCE(!local_port || local_port >= max_ports)) return; mlxsw_sp_port = mlxsw_sp->ports[local_port]; if (!mlxsw_sp_port)

From: Varun Prakash varun@chelsio.com

[ Upstream commit 102110efdff6beedece6ab9b51664c32ac01e2db ]

Current nvmet_try_send_ddgst() code does not check whether all data digest bytes are transmitted, fix this by returning -EAGAIN if all data digest bytes are not transmitted.

Fixes: 872d26a391da ("nvmet-tcp: add NVMe over TCP target driver") Signed-off-by: Varun Prakash varun@chelsio.com Reviewed-by: Sagi Grimberg sagi@grimberg.me Signed-off-by: Christoph Hellwig hch@lst.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/target/tcp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 1251fd6e92780..96b67a70cbbbd 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -688,10 +688,11 @@ static int nvmet_try_send_r2t(struct nvmet_tcp_cmd *cmd, bool last_in_batch) static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd, bool last_in_batch) { struct nvmet_tcp_queue *queue = cmd->queue; + int left = NVME_TCP_DIGEST_LENGTH - cmd->offset; struct msghdr msg = { .msg_flags = MSG_DONTWAIT }; struct kvec iov = { .iov_base = (u8 *)&cmd->exp_ddgst + cmd->offset, - .iov_len = NVME_TCP_DIGEST_LENGTH - cmd->offset + .iov_len = left }; int ret;

@@ -705,6 +706,10 @@ static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd, bool last_in_batch) return ret;

cmd->offset += ret; + left -= ret; + + if (left) + return -EAGAIN;

if (queue->nvme_sq.sqhd_disabled) { cmd->queue->snd_cmd = NULL;

From: Thomas Zeitlhofer thomas.zeitlhofer+lkml@ze-it.at

[ Upstream commit cefcf24b4d351daf70ecd945324e200d3736821e ]

Commit 39fbef4b0f77 ("PM: hibernate: Get block device exclusively in swsusp_check()") changed the opening mode of the block device to (FMODE_READ | FMODE_EXCL).

In the corresponding calls to swsusp_close(), the mode is still just FMODE_READ which triggers the warning in blkdev_flush_mapping() on resume from hibernate.

So, use the mode (FMODE_READ | FMODE_EXCL) also when closing the device.

Fixes: 39fbef4b0f77 ("PM: hibernate: Get block device exclusively in swsusp_check()") Signed-off-by: Thomas Zeitlhofer thomas.zeitlhofer+lkml@ze-it.at Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/power/hibernate.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 2fc7d509a34fc..bf640fd6142a0 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -688,7 +688,7 @@ static int load_image_and_restore(void) goto Unlock;

error = swsusp_read(&flags); - swsusp_close(FMODE_READ); + swsusp_close(FMODE_READ | FMODE_EXCL); if (!error) error = hibernation_restore(flags & SF_PLATFORM_MODE);

@@ -978,7 +978,7 @@ static int software_resume(void) /* The snapshot device should not be opened while we're running */ if (!hibernate_acquire()) { error = -EBUSY; - swsusp_close(FMODE_READ); + swsusp_close(FMODE_READ | FMODE_EXCL); goto Unlock; }

@@ -1013,7 +1013,7 @@ static int software_resume(void) pm_pr_dbg("Hibernation image not present or could not be loaded.\n"); return error; Close_Finish: - swsusp_close(FMODE_READ); + swsusp_close(FMODE_READ | FMODE_EXCL); goto Finish; }

From: Eric Dumazet edumazet@google.com

[ Upstream commit 4e1fddc98d2585ddd4792b5e44433dcee7ece001 ]

While testing BIG TCP patch series, I was expecting that TCP_RR workloads with 80KB requests/answers would send one 80KB TSO packet, then being received as a single GRO packet.

It turns out this was not happening, and the root cause was that cubic Hystart ACK train was triggering after a few (2 or 3) rounds of RPC.

Hystart was wrongly setting CWND/SSTHRESH to 30, while my RPC needed a budget of ~20 segments.

Ideally these TCP_RR flows should not exit slow start.

Cubic Hystart should reset itself at each round, instead of assuming every TCP flow is a bulk one.

Note that even after this patch, Hystart can still trigger, depending on scheduling artifacts, but at a higher CWND/SSTHRESH threshold, keeping optimal TSO packet sizes.

Tested:

ip link set dev eth0 gro_ipv6_max_size 131072 gso_ipv6_max_size 131072 nstat -n; netperf -H ... -t TCP_RR -l 5 -- -r 80000,80000 -K cubic; nstat|egrep "Ip6InReceives|Hystart|Ip6OutRequests"

Before:

8605 Ip6InReceives 87541 0.0 Ip6OutRequests 129496 0.0 TcpExtTCPHystartTrainDetect 1 0.0 TcpExtTCPHystartTrainCwnd 30 0.0

After:

8760 Ip6InReceives 88514 0.0 Ip6OutRequests 87975 0.0

Fixes: ae27e98a5152 ("[TCP] CUBIC v2.3") Co-developed-by: Neal Cardwell ncardwell@google.com Signed-off-by: Neal Cardwell ncardwell@google.com Signed-off-by: Eric Dumazet edumazet@google.com Cc: Stephen Hemminger stephen@networkplumber.org Cc: Yuchung Cheng ycheng@google.com Cc: Soheil Hassas Yeganeh soheil@google.com Link: https://lore.kernel.org/r/20211123202535.1843771-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/tcp_cubic.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c index c7bf5b26bf0c2..fffa011a007d4 100644 --- a/net/ipv4/tcp_cubic.c +++ b/net/ipv4/tcp_cubic.c @@ -337,8 +337,6 @@ static void bictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked) return;

if (tcp_in_slow_start(tp)) { - if (hystart && after(ack, ca->end_seq)) - bictcp_hystart_reset(sk); acked = tcp_slow_start(tp, acked); if (!acked) return; @@ -398,6 +396,9 @@ static void hystart_update(struct sock *sk, u32 delay) struct bictcp *ca = inet_csk_ca(sk); u32 threshold;

+ if (after(tp->snd_una, ca->end_seq)) + bictcp_hystart_reset(sk); + if (hystart_detect & HYSTART_ACK_TRAIN) { u32 now = bictcp_clock_us(sk);

From: Russell King (Oracle) rmk+kernel@armlinux.org.uk

[ Upstream commit 80662f4fd4771bc9c7cc4abdfbe866ebd1179621 ]

On PHY state change the phylink_resolve() function can read stale information from the MAC and report incorrect link speed and duplex to the kernel message log.

Example with a Marvell 88X3310 PHY connected to a SerDes port on Marvell 88E6393X switch: - PHY driver triggers state change due to PHY interface mode being changed from 10gbase-r to 2500base-x due to copper change in speed from 10Gbps to 2.5Gbps, but the PHY itself either hasn't yet changed its interface to the host, or the interrupt about loss of SerDes link hadn't arrived yet (there can be a delay of several milliseconds for this), so we still think that the 10gbase-r mode is up - phylink_resolve() - phylink_mac_pcs_get_state() - this fills in speed=10g link=up - interface mode is updated to 2500base-x but speed is left at 10Gbps - phylink_major_config() - interface is changed to 2500base-x - phylink_link_up() - mv88e6xxx_mac_link_up() - .port_set_speed_duplex() - speed is set to 10Gbps - reports "Link is Up - 10Gbps/Full" to dmesg

Afterwards when the interrupt finally arrives for mv88e6xxx, another resolve is forced in which we get the correct speed from phylink_mac_pcs_get_state(), but since the interface is not being changed anymore, we don't call phylink_major_config() but only phylink_mac_config(), which does not set speed/duplex anymore.

To fix this, we need to force the link down and trigger another resolve on PHY interface change event.

Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/phylink.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 899496f089d2e..8279e08dad9db 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -644,6 +644,7 @@ static void phylink_resolve(struct work_struct *w) struct phylink_link_state link_state; struct net_device *ndev = pl->netdev; bool mac_config = false; + bool retrigger = false; bool cur_link_state;

mutex_lock(&pl->state_mutex); @@ -657,6 +658,7 @@ static void phylink_resolve(struct work_struct *w) link_state.link = false; } else if (pl->mac_link_dropped) { link_state.link = false; + retrigger = true; } else { switch (pl->cur_link_an_mode) { case MLO_AN_PHY: @@ -680,6 +682,15 @@ static void phylink_resolve(struct work_struct *w)

/* Only update if the PHY link is up */ if (pl->phydev && pl->phy_state.link) { + /* If the interface has changed, force a + * link down event if the link isn't already + * down, and re-resolve. + */ + if (link_state.interface != + pl->phy_state.interface) { + retrigger = true; + link_state.link = false; + } link_state.interface = pl->phy_state.interface;

/* If we have a PHY, we need to update with @@ -721,7 +732,7 @@ static void phylink_resolve(struct work_struct *w) else phylink_link_up(pl, link_state); } - if (!link_state.link && pl->mac_link_dropped) { + if (!link_state.link && retrigger) { pl->mac_link_dropped = false; queue_work(system_power_efficient_wq, &pl->resolve); }

From: Karsten Graul kgraul@linux.ibm.com

[ Upstream commit 587acad41f1bc48e16f42bb2aca63bf323380be8 ]

Coverity reports a possible NULL dereferencing problem:

in smc_vlan_by_tcpsk(): 6. returned_null: netdev_lower_get_next returns NULL (checked 29 out of 30 times). 7. var_assigned: Assigning: ndev = NULL return value from netdev_lower_get_next. 1623 ndev = (struct net_device *)netdev_lower_get_next(ndev, &lower); CID 1468509 (#1 of 1): Dereference null return value (NULL_RETURNS) 8. dereference: Dereferencing a pointer that might be NULL ndev when calling is_vlan_dev. 1624 if (is_vlan_dev(ndev)) {

Remove the manual implementation and use netdev_walk_all_lower_dev() to iterate over the lower devices. While on it remove an obsolete function parameter comment.

Fixes: cb9d43f67754 ("net/smc: determine vlan_id of stacked net_device") Suggested-by: Julian Wiedmann jwi@linux.ibm.com Signed-off-by: Karsten Graul kgraul@linux.ibm.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/smc/smc_core.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 109d790eaebe2..cd625b672429f 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -1209,14 +1209,26 @@ static void smc_link_down_work(struct work_struct *work) mutex_unlock(&lgr->llc_conf_mutex); }

-/* Determine vlan of internal TCP socket. - * @vlan_id: address to store the determined vlan id into - */ +static int smc_vlan_by_tcpsk_walk(struct net_device *lower_dev, + struct netdev_nested_priv *priv) +{ + unsigned short *vlan_id = (unsigned short *)priv->data; + + if (is_vlan_dev(lower_dev)) { + *vlan_id = vlan_dev_vlan_id(lower_dev); + return 1; + } + + return 0; +} + +/* Determine vlan of internal TCP socket. */ int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini) { struct dst_entry *dst = sk_dst_get(clcsock->sk); + struct netdev_nested_priv priv; struct net_device *ndev; - int i, nest_lvl, rc = 0; + int rc = 0;

ini->vlan_id = 0; if (!dst) { @@ -1234,20 +1246,9 @@ int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini) goto out_rel; }

+ priv.data = (void *)&ini->vlan_id; rtnl_lock(); - nest_lvl = ndev->lower_level; - for (i = 0; i < nest_lvl; i++) { - struct list_head *lower = &ndev->adj_list.lower; - - if (list_empty(lower)) - break; - lower = lower->next; - ndev = (struct net_device *)netdev_lower_get_next(ndev, &lower); - if (is_vlan_dev(ndev)) { - ini->vlan_id = vlan_dev_vlan_id(ndev); - break; - } - } + netdev_walk_all_lower_dev(ndev, smc_vlan_by_tcpsk_walk, &priv); rtnl_unlock();

out_rel:

From: Maurizio Lombardi mlombard@redhat.com

[ Upstream commit c024b226a417c4eb9353ff500b1c823165d4d508 ]

Submit I/O requests with the IOCB_NOWAIT flag set only if the underlying filesystem supports it.

Fixes: 50a909db36f2 ("nvmet: use IOCB_NOWAIT for file-ns buffered I/O") Signed-off-by: Maurizio Lombardi mlombard@redhat.com Reviewed-by: Chaitanya Kulkarni kch@nvidia.com Signed-off-by: Christoph Hellwig hch@lst.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/target/io-cmd-file.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/target/io-cmd-file.c b/drivers/nvme/target/io-cmd-file.c index b575997244482..c81690b2a681b 100644 --- a/drivers/nvme/target/io-cmd-file.c +++ b/drivers/nvme/target/io-cmd-file.c @@ -8,6 +8,7 @@ #include <linux/uio.h> #include <linux/falloc.h> #include <linux/file.h> +#include <linux/fs.h> #include "nvmet.h"

#define NVMET_MAX_MPOOL_BVEC 16 @@ -266,7 +267,8 @@ static void nvmet_file_execute_rw(struct nvmet_req *req)

if (req->ns->buffered_io) { if (likely(!req->f.mpool_alloc) && - nvmet_file_execute_io(req, IOCB_NOWAIT)) + (req->ns->file->f_mode & FMODE_NOWAIT) && + nvmet_file_execute_io(req, IOCB_NOWAIT)) return; nvmet_file_submit_buffered_io(req); } else

From: Huang Pei huangpei@loongson.cn

[ Upstream commit 7db5e9e9e5e6c10d7d26f8df7f8fd8841cb15ee7 ]

It turns out that 'decode_configs' -> 'set_ftlb_enable' is called under c->cputype unset, which leaves FTLB disabled on BOTH 3A2000 and 3A3000

Fix it by calling "decode_configs" after c->cputype is initialized

Fixes: da1bd29742b1 ("MIPS: Loongson64: Probe CPU features via CPUCFG") Signed-off-by: Huang Pei huangpei@loongson.cn Signed-off-by: Thomas Bogendoerfer tsbogend@alpha.franken.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/kernel/cpu-probe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 067cb3eb16141..d120201910acf 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -1721,8 +1721,6 @@ static inline void decode_cpucfg(struct cpuinfo_mips *c)

static inline void cpu_probe_loongson(struct cpuinfo_mips *c, unsigned int cpu) { - decode_configs(c); - /* All Loongson processors covered here define ExcCode 16 as GSExc. */ c->options |= MIPS_CPU_GSEXCEX;

@@ -1783,6 +1781,8 @@ static inline void cpu_probe_loongson(struct cpuinfo_mips *c, unsigned int cpu) panic("Unknown Loongson Processor ID!"); break; } + + decode_configs(c); } #else static inline void cpu_probe_loongson(struct cpuinfo_mips *c, unsigned int cpu) { }

From: Jakub Kicinski kuba@kernel.org

[ Upstream commit 520493f66f6822551aef2879cd40207074fe6980 ]

We don't support splicing control records. TLS 1.3 changes moved the record type check into the decrypt if(). The skb may already be decrypted and still be an alert.

Note that decrypt_skb_update() is idempotent and updates ctx->decrypted so the if() is pointless.

Reorder the check for decryption errors with the content type check while touching them. This part is not really a bug, because if decryption failed in TLS 1.3 content type will be DATA, and for TLS 1.2 it will be correct. Nevertheless its strange to touch output before checking if the function has failed.

Fixes: fedf201e1296 ("net: tls: Refactor control message handling on recv") Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/tls/tls_sw.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 14cce61160a58..122d5daed8b61 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -2007,21 +2007,18 @@ ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, if (!skb) goto splice_read_end;

- if (!ctx->decrypted) { - err = decrypt_skb_update(sk, skb, NULL, &chunk, &zc, false); - - /* splice does not support reading control messages */ - if (ctx->control != TLS_RECORD_TYPE_DATA) { - err = -EINVAL; - goto splice_read_end; - } + err = decrypt_skb_update(sk, skb, NULL, &chunk, &zc, false); + if (err < 0) { + tls_err_abort(sk, -EBADMSG); + goto splice_read_end; + }

- if (err < 0) { - tls_err_abort(sk, -EBADMSG); - goto splice_read_end; - } - ctx->decrypted = 1; + /* splice does not support reading control messages */ + if (ctx->control != TLS_RECORD_TYPE_DATA) { + err = -EINVAL; + goto splice_read_end; } + rxm = strp_msg(skb);

chunk = min_t(unsigned int, rxm->full_len, len);

From: Davide Caratti dcaratti@redhat.com

[ Upstream commit de6d25924c2a8c2988c6a385990cafbe742061bf ]

when the number of DRR classes decreases, the round-robin active list can contain elements that have already been freed in ets_qdisc_change(). As a consequence, it's possible to see a NULL dereference crash, caused by the attempt to call cl->qdisc->ops->peek(cl->qdisc) when cl->qdisc is NULL:

BUG: kernel NULL pointer dereference, address: 0000000000000018 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 PID: 910 Comm: mausezahn Not tainted 5.16.0-rc1+ #475 Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014 RIP: 0010:ets_qdisc_dequeue+0x129/0x2c0 [sch_ets] Code: c5 01 41 39 ad e4 02 00 00 0f 87 18 ff ff ff 49 8b 85 c0 02 00 00 49 39 c4 0f 84 ba 00 00 00 49 8b ad c0 02 00 00 48 8b 7d 10 <48> 8b 47 18 48 8b 40 38 0f ae e8 ff d0 48 89 c3 48 85 c0 0f 84 9d RSP: 0000:ffffbb36c0b5fdd8 EFLAGS: 00010287 RAX: ffff956678efed30 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff9b938dc9 RDI: 0000000000000000 RBP: ffff956678efed30 R08: e2f3207fe360129c R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff956678efeac0 R13: ffff956678efe800 R14: ffff956611545000 R15: ffff95667ac8f100 FS: 00007f2aa9120740(0000) GS:ffff95667b800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 000000011070c000 CR4: 0000000000350ee0 Call Trace: <TASK> qdisc_peek_dequeued+0x29/0x70 [sch_ets] tbf_dequeue+0x22/0x260 [sch_tbf] __qdisc_run+0x7f/0x630 net_tx_action+0x290/0x4c0 __do_softirq+0xee/0x4f8 irq_exit_rcu+0xf4/0x130 sysvec_apic_timer_interrupt+0x52/0xc0 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0033:0x7f2aa7fc9ad4 Code: b9 ff ff 48 8b 54 24 18 48 83 c4 08 48 89 ee 48 89 df 5b 5d e9 ed fc ff ff 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa <53> 48 83 ec 10 48 8b 05 10 64 33 00 48 8b 00 48 85 c0 0f 85 84 00 RSP: 002b:00007ffe5d33fab8 EFLAGS: 00000202 RAX: 0000000000000002 RBX: 0000561f72c31460 RCX: 0000561f72c31720 RDX: 0000000000000002 RSI: 0000561f72c31722 RDI: 0000561f72c31720 RBP: 000000000000002a R08: 00007ffe5d33fa40 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000246 R12: 0000561f7187e380 R13: 0000000000000000 R14: 0000000000000000 R15: 0000561f72c31460 </TASK> Modules linked in: sch_ets sch_tbf dummy rfkill iTCO_wdt intel_rapl_msr iTCO_vendor_support intel_rapl_common joydev virtio_balloon lpc_ich i2c_i801 i2c_smbus pcspkr ip_tables xfs libcrc32c crct10dif_pclmul crc32_pclmul crc32c_intel ahci libahci ghash_clmulni_intel serio_raw libata virtio_blk virtio_console virtio_net net_failover failover sunrpc dm_mirror dm_region_hash dm_log dm_mod CR2: 0000000000000018

Ensuring that 'alist' was never zeroed [1] was not sufficient, we need to remove from the active list those elements that are no more SP nor DRR.

[1] https://lore.kernel.org/netdev/60d274838bf09777f0371253416e8af71360bc08.1633...

v3: fix race between ets_qdisc_change() and ets_qdisc_dequeue() delisting DRR classes beyond 'nbands' in ets_qdisc_change() with the qdisc lock acquired, thanks to Cong Wang.

v2: when a NULL qdisc is found in the DRR active list, try to dequeue skb from the next list item.

Reported-by: Hangbin Liu liuhangbin@gmail.com Fixes: dcc68b4d8084 ("net: sch_ets: Add a new Qdisc") Signed-off-by: Davide Caratti dcaratti@redhat.com Link: https://lore.kernel.org/r/7a5c496eed2d62241620bdbb83eb03fb9d571c99.163776272... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/sched/sch_ets.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/sched/sch_ets.c b/net/sched/sch_ets.c index c76701ac35abf..c34cb6e81d855 100644 --- a/net/sched/sch_ets.c +++ b/net/sched/sch_ets.c @@ -667,12 +667,14 @@ static int ets_qdisc_change(struct Qdisc *sch, struct nlattr *opt, q->classes[i].deficit = quanta[i]; } } + for (i = q->nbands; i < oldbands; i++) { + qdisc_tree_flush_backlog(q->classes[i].qdisc); + if (i >= q->nstrict) + list_del(&q->classes[i].alist); + } q->nstrict = nstrict; memcpy(q->prio2band, priomap, sizeof(priomap));

- for (i = q->nbands; i < oldbands; i++) - qdisc_tree_flush_backlog(q->classes[i].qdisc); - for (i = 0; i < q->nbands; i++) q->classes[i].quantum = quanta[i];

From: Tony Lu tonylu@linux.alibaba.com

[ Upstream commit bacb6c1e47691cda4a95056c21b5487fb7199fcc ]

When applications call shutdown() with SHUT_RDWR in userspace, smc_close_active() calls kernel_sock_shutdown(), and it is called twice in smc_shutdown().

This fixes this by checking sk_state before do clcsock shutdown, and avoids missing the application's call of smc_shutdown().

Link: https://lore.kernel.org/linux-s390/1f67548e-cbf6-0dce-82b5-10288a4583bd@linu... Fixes: 606a63c9783a ("net/smc: Ensure the active closing peer first closes clcsock") Signed-off-by: Tony Lu tonylu@linux.alibaba.com Reviewed-by: Wen Gu guwen@linux.alibaba.com Acked-by: Karsten Graul kgraul@linux.ibm.com Link: https://lore.kernel.org/r/20211126024134.45693-1-tonylu@linux.alibaba.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/smc/af_smc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index a0d3f4e07b067..ac8265e35b2d2 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -2098,8 +2098,10 @@ static __poll_t smc_poll(struct file *file, struct socket *sock, static int smc_shutdown(struct socket *sock, int how) { struct sock *sk = sock->sk; + bool do_shutdown = true; struct smc_sock *smc; int rc = -EINVAL; + int old_state; int rc1 = 0;

smc = smc_sk(sk); @@ -2126,7 +2128,11 @@ static int smc_shutdown(struct socket *sock, int how) } switch (how) { case SHUT_RDWR: /* shutdown in both directions */ + old_state = sk->sk_state; rc = smc_close_active(smc); + if (old_state == SMC_ACTIVE && + sk->sk_state == SMC_PEERCLOSEWAIT1) + do_shutdown = false; break; case SHUT_WR: rc = smc_close_shutdown_write(smc); @@ -2136,7 +2142,7 @@ static int smc_shutdown(struct socket *sock, int how) /* nothing more to do because peer is not involved */ break; } - if (smc->clcsock) + if (do_shutdown && smc->clcsock) rc1 = kernel_sock_shutdown(smc->clcsock, how); /* map sock_shutdown_cmd constants to sk_shutdown value range */ sk->sk_shutdown |= how + 1;

From: Vladimir Oltean vladimir.oltean@nxp.com

[ Upstream commit 8a075464d1e9317ffae0973dfe538a7511291a06 ]

The ocelot driver, when asked to timestamp all receiving packets, 1588 v1 or NTP, says "nah, here's 1588 v2 for you".

According to this discussion: https://patchwork.kernel.org/project/netdevbpf/patch/20211104133204.19757-8-... drivers that downgrade from a wider request to a narrower response (or even a response where the intersection with the request is empty) are buggy, and should return -ERANGE instead. This patch fixes that.

Fixes: 4e3b0468e6d7 ("net: mscc: PTP Hardware Clock (PHC) support") Suggested-by: Richard Cochran richardcochran@gmail.com Signed-off-by: Vladimir Oltean vladimir.oltean@nxp.com Acked-by: Richard Cochran richardcochran@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mscc/ocelot.c | 6 ------ 1 file changed, 6 deletions(-)

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c index 8c45b236649a9..154d67066d012 100644 --- a/drivers/net/ethernet/mscc/ocelot.c +++ b/drivers/net/ethernet/mscc/ocelot.c @@ -811,12 +811,6 @@ int ocelot_hwstamp_set(struct ocelot *ocelot, int port, struct ifreq *ifr) switch (cfg.rx_filter) { case HWTSTAMP_FILTER_NONE: break; - case HWTSTAMP_FILTER_ALL: - case HWTSTAMP_FILTER_SOME: - case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: - case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: - case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: - case HWTSTAMP_FILTER_NTP_ALL: case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:

From: Arjun Roy arjunroy@google.com

[ Upstream commit e0fecb289ad3fd2245cdc50bf450b97fcca39884 ]

A prior patch increased the size of struct tcp_zerocopy_receive but did not update do_tcp_getsockopt() handling to properly account for this.

This patch simply reintroduces content erroneously cut from the referenced prior patch that handles the new struct size.

Fixes: 18fb76ed5386 ("net-zerocopy: Copy straggler unaligned data for TCP Rx. zerocopy.") Signed-off-by: Arjun Roy arjunroy@google.com Signed-off-by: Eric Dumazet edumazet@google.com Signed-off-by: Soheil Hassas Yeganeh soheil@google.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/tcp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index bb16c88f58a3c..63c81af41b43e 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3931,7 +3931,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level, } #ifdef CONFIG_MMU case TCP_ZEROCOPY_RECEIVE: { - struct tcp_zerocopy_receive zc; + struct tcp_zerocopy_receive zc = {}; int err;

if (get_user(len, optlen)) @@ -3949,7 +3949,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level, lock_sock(sk); err = tcp_zerocopy_receive(sk, &zc); release_sock(sk); - if (len == sizeof(zc)) + if (len >= offsetofend(struct tcp_zerocopy_receive, err)) goto zerocopy_rcv_sk_err; switch (len) { case offsetofend(struct tcp_zerocopy_receive, err):

From: Weichao Guo guoweichao@oppo.com

[ Upstream commit 6663b138ded1a59e630c9e605e42aa7fde490cdc ]

Inconsistent node block will cause a file fail to open or read, which could make the user process crashes or stucks. Let's mark SBI_NEED_FSCK flag to trigger a fix at next fsck time. After unlinking the corrupted file, the user process could regenerate a new one and work correctly.

Signed-off-by: Weichao Guo guoweichao@oppo.com Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/node.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 597a145c08ef5..7e625806bd4a2 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1389,6 +1389,7 @@ static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid, nid, nid_of_node(page), ino_of_node(page), ofs_of_node(page), cpver_of_node(page), next_blkaddr_of_node(page)); + set_sbi_flag(sbi, SBI_NEED_FSCK); err = -EINVAL; out_err: ClearPageUptodate(page);

From: Steve French stfrench@microsoft.com

[ Upstream commit 71e6864eacbef0b2645ca043cdfbac272cb6cea3 ]

Linux allows doing a flush/fsync on a file open for read-only, but the protocol does not allow that. If the file passed in on the flush is read-only try to find a writeable handle for the same inode, if that is not possible skip sending the fsync call to the server to avoid breaking the apps.

Reported-by: Julian Sikorski belegdol@gmail.com Tested-by: Julian Sikorski belegdol@gmail.com Suggested-by: Jeremy Allison jra@samba.org Reviewed-by: Paulo Alcantara (SUSE) pc@cjr.nz Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/cifs/file.c | 35 +++++++++++++++++++++++++++++------ 1 file changed, 29 insertions(+), 6 deletions(-)

diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 67139f9d583f2..6c06870f90184 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2618,12 +2618,23 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end, tcon = tlink_tcon(smbfile->tlink); if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { server = tcon->ses->server; - if (server->ops->flush) - rc = server->ops->flush(xid, tcon, &smbfile->fid); - else + if (server->ops->flush == NULL) { rc = -ENOSYS; + goto strict_fsync_exit; + } + + if ((OPEN_FMODE(smbfile->f_flags) & FMODE_WRITE) == 0) { + smbfile = find_writable_file(CIFS_I(inode), FIND_WR_ANY); + if (smbfile) { + rc = server->ops->flush(xid, tcon, &smbfile->fid); + cifsFileInfo_put(smbfile); + } else + cifs_dbg(FYI, "ignore fsync for file not open for write\n"); + } else + rc = server->ops->flush(xid, tcon, &smbfile->fid); }

+strict_fsync_exit: free_xid(xid); return rc; } @@ -2635,6 +2646,7 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) struct cifs_tcon *tcon; struct TCP_Server_Info *server; struct cifsFileInfo *smbfile = file->private_data; + struct inode *inode = file_inode(file); struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);

rc = file_write_and_wait_range(file, start, end); @@ -2651,12 +2663,23 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) tcon = tlink_tcon(smbfile->tlink); if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { server = tcon->ses->server; - if (server->ops->flush) - rc = server->ops->flush(xid, tcon, &smbfile->fid); - else + if (server->ops->flush == NULL) { rc = -ENOSYS; + goto fsync_exit; + } + + if ((OPEN_FMODE(smbfile->f_flags) & FMODE_WRITE) == 0) { + smbfile = find_writable_file(CIFS_I(inode), FIND_WR_ANY); + if (smbfile) { + rc = server->ops->flush(xid, tcon, &smbfile->fid); + cifsFileInfo_put(smbfile); + } else + cifs_dbg(FYI, "ignore fsync for file not open for write\n"); + } else + rc = server->ops->flush(xid, tcon, &smbfile->fid); }

+fsync_exit: free_xid(xid); return rc; }

From: Stefano Garzarella sgarzare@redhat.com

commit 49d8c5ffad07ca014cfae72a1b9b8c52b6ad9cb8 upstream.

The "used length" reported by calling vhost_add_used() must be the number of bytes written by the device (using "in" buffers).

In vhost_vsock_handle_tx_kick() the device only reads the guest buffers (they are all "out" buffers), without writing anything, so we must pass 0 as "used length" to comply virtio spec.

Fixes: 433fc58e6bf2 ("VSOCK: Introduce vhost_vsock.ko") Cc: stable@vger.kernel.org Reported-by: Halil Pasic pasic@linux.ibm.com Suggested-by: Jason Wang jasowang@redhat.com Signed-off-by: Stefano Garzarella sgarzare@redhat.com Link: https://lore.kernel.org/r/20211122163525.294024-2-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Reviewed-by: Stefan Hajnoczi stefanha@redhat.com Reviewed-by: Halil Pasic pasic@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/vhost/vsock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -494,7 +494,7 @@ static void vhost_vsock_handle_tx_kick(s virtio_transport_free_pkt(pkt);

len += sizeof(pkt->hdr); - vhost_add_used(vq, head, len); + vhost_add_used(vq, head, 0); total_len += len; added = true; } while(likely(!vhost_exceeds_weight(vq, ++pkts, total_len)));

From: Juergen Gross jgross@suse.com

commit 629a5d87e26fe96bcaab44cbb81f5866af6f7008 upstream.

Sync include/xen/interface/io/ring.h with Xen's newest version in order to get the RING_COPY_RESPONSE() and RING_RESPONSE_PROD_OVERFLOW() macros.

Note that this will correct the wrong license info by adding the missing original copyright notice.

Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/xen/interface/io/ring.h | 280 ++++++++++++++++++++++------------------ 1 file changed, 157 insertions(+), 123 deletions(-)

--- a/include/xen/interface/io/ring.h +++ b/include/xen/interface/io/ring.h @@ -1,21 +1,53 @@ -/* SPDX-License-Identifier: GPL-2.0 */ /****************************************************************************** * ring.h * * Shared producer-consumer ring macros. * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * * Tim Deegan and Andrew Warfield November 2004. */

#ifndef __XEN_PUBLIC_IO_RING_H__ #define __XEN_PUBLIC_IO_RING_H__

+/* + * When #include'ing this header, you need to provide the following + * declaration upfront: + * - standard integers types (uint8_t, uint16_t, etc) + * They are provided by stdint.h of the standard headers. + * + * In addition, if you intend to use the FLEX macros, you also need to + * provide the following, before invoking the FLEX macros: + * - size_t + * - memcpy + * - grant_ref_t + * These declarations are provided by string.h of the standard headers, + * and grant_table.h from the Xen public headers. + */ + #include <xen/interface/grant_table.h>

typedef unsigned int RING_IDX;

/* Round a 32-bit unsigned constant down to the nearest power of two. */ -#define __RD2(_x) (((_x) & 0x00000002) ? 0x2 : ((_x) & 0x1)) +#define __RD2(_x) (((_x) & 0x00000002) ? 0x2 : ((_x) & 0x1)) #define __RD4(_x) (((_x) & 0x0000000c) ? __RD2((_x)>>2)<<2 : __RD2(_x)) #define __RD8(_x) (((_x) & 0x000000f0) ? __RD4((_x)>>4)<<4 : __RD4(_x)) #define __RD16(_x) (((_x) & 0x0000ff00) ? __RD8((_x)>>8)<<8 : __RD8(_x)) @@ -27,82 +59,79 @@ typedef unsigned int RING_IDX; * A ring contains as many entries as will fit, rounded down to the nearest * power of two (so we can mask with (size-1) to loop around). */ -#define __CONST_RING_SIZE(_s, _sz) \ - (__RD32(((_sz) - offsetof(struct _s##_sring, ring)) / \ - sizeof(((struct _s##_sring *)0)->ring[0]))) - +#define __CONST_RING_SIZE(_s, _sz) \ + (__RD32(((_sz) - offsetof(struct _s##_sring, ring)) / \ + sizeof(((struct _s##_sring *)0)->ring[0]))) /* * The same for passing in an actual pointer instead of a name tag. */ -#define __RING_SIZE(_s, _sz) \ - (__RD32(((_sz) - (long)&(_s)->ring + (long)(_s)) / sizeof((_s)->ring[0]))) +#define __RING_SIZE(_s, _sz) \ + (__RD32(((_sz) - (long)(_s)->ring + (long)(_s)) / sizeof((_s)->ring[0])))

/* * Macros to make the correct C datatypes for a new kind of ring. * * To make a new ring datatype, you need to have two message structures, - * let's say struct request, and struct response already defined. + * let's say request_t, and response_t already defined. * * In a header where you want the ring datatype declared, you then do: * - * DEFINE_RING_TYPES(mytag, struct request, struct response); + * DEFINE_RING_TYPES(mytag, request_t, response_t); * * These expand out to give you a set of types, as you can see below. * The most important of these are: * - * struct mytag_sring - The shared ring. - * struct mytag_front_ring - The 'front' half of the ring. - * struct mytag_back_ring - The 'back' half of the ring. + * mytag_sring_t - The shared ring. + * mytag_front_ring_t - The 'front' half of the ring. + * mytag_back_ring_t - The 'back' half of the ring. * * To initialize a ring in your code you need to know the location and size * of the shared memory area (PAGE_SIZE, for instance). To initialise * the front half: * - * struct mytag_front_ring front_ring; - * SHARED_RING_INIT((struct mytag_sring *)shared_page); - * FRONT_RING_INIT(&front_ring, (struct mytag_sring *)shared_page, - * PAGE_SIZE); + * mytag_front_ring_t front_ring; + * SHARED_RING_INIT((mytag_sring_t *)shared_page); + * FRONT_RING_INIT(&front_ring, (mytag_sring_t *)shared_page, PAGE_SIZE); * * Initializing the back follows similarly (note that only the front * initializes the shared ring): * - * struct mytag_back_ring back_ring; - * BACK_RING_INIT(&back_ring, (struct mytag_sring *)shared_page, - * PAGE_SIZE); + * mytag_back_ring_t back_ring; + * BACK_RING_INIT(&back_ring, (mytag_sring_t *)shared_page, PAGE_SIZE); */

-#define DEFINE_RING_TYPES(__name, __req_t, __rsp_t) \ - \ -/* Shared ring entry */ \ -union __name##_sring_entry { \ - __req_t req; \ - __rsp_t rsp; \ -}; \ - \ -/* Shared ring page */ \ -struct __name##_sring { \ - RING_IDX req_prod, req_event; \ - RING_IDX rsp_prod, rsp_event; \ - uint8_t pad[48]; \ - union __name##_sring_entry ring[1]; /* variable-length */ \ -}; \ - \ -/* "Front" end's private variables */ \ -struct __name##_front_ring { \ - RING_IDX req_prod_pvt; \ - RING_IDX rsp_cons; \ - unsigned int nr_ents; \ - struct __name##_sring *sring; \ -}; \ - \ -/* "Back" end's private variables */ \ -struct __name##_back_ring { \ - RING_IDX rsp_prod_pvt; \ - RING_IDX req_cons; \ - unsigned int nr_ents; \ - struct __name##_sring *sring; \ -}; - +#define DEFINE_RING_TYPES(__name, __req_t, __rsp_t) \ + \ +/* Shared ring entry */ \ +union __name##_sring_entry { \ + __req_t req; \ + __rsp_t rsp; \ +}; \ + \ +/* Shared ring page */ \ +struct __name##_sring { \ + RING_IDX req_prod, req_event; \ + RING_IDX rsp_prod, rsp_event; \ + uint8_t __pad[48]; \ + union __name##_sring_entry ring[1]; /* variable-length */ \ +}; \ + \ +/* "Front" end's private variables */ \ +struct __name##_front_ring { \ + RING_IDX req_prod_pvt; \ + RING_IDX rsp_cons; \ + unsigned int nr_ents; \ + struct __name##_sring *sring; \ +}; \ + \ +/* "Back" end's private variables */ \ +struct __name##_back_ring { \ + RING_IDX rsp_prod_pvt; \ + RING_IDX req_cons; \ + unsigned int nr_ents; \ + struct __name##_sring *sring; \ +}; \ + \ /* * Macros for manipulating rings. * @@ -119,94 +148,99 @@ struct __name##_back_ring { \ */

/* Initialising empty rings */ -#define SHARED_RING_INIT(_s) do { \ - (_s)->req_prod = (_s)->rsp_prod = 0; \ - (_s)->req_event = (_s)->rsp_event = 1; \ - memset((_s)->pad, 0, sizeof((_s)->pad)); \ +#define SHARED_RING_INIT(_s) do { \ + (_s)->req_prod = (_s)->rsp_prod = 0; \ + (_s)->req_event = (_s)->rsp_event = 1; \ + (void)memset((_s)->__pad, 0, sizeof((_s)->__pad)); \ } while(0)

-#define FRONT_RING_ATTACH(_r, _s, _i, __size) do { \ - (_r)->req_prod_pvt = (_i); \ - (_r)->rsp_cons = (_i); \ - (_r)->nr_ents = __RING_SIZE(_s, __size); \ - (_r)->sring = (_s); \ +#define FRONT_RING_ATTACH(_r, _s, _i, __size) do { \ + (_r)->req_prod_pvt = (_i); \ + (_r)->rsp_cons = (_i); \ + (_r)->nr_ents = __RING_SIZE(_s, __size); \ + (_r)->sring = (_s); \ } while (0)

#define FRONT_RING_INIT(_r, _s, __size) FRONT_RING_ATTACH(_r, _s, 0, __size)

-#define BACK_RING_ATTACH(_r, _s, _i, __size) do { \ - (_r)->rsp_prod_pvt = (_i); \ - (_r)->req_cons = (_i); \ - (_r)->nr_ents = __RING_SIZE(_s, __size); \ - (_r)->sring = (_s); \ +#define BACK_RING_ATTACH(_r, _s, _i, __size) do { \ + (_r)->rsp_prod_pvt = (_i); \ + (_r)->req_cons = (_i); \ + (_r)->nr_ents = __RING_SIZE(_s, __size); \ + (_r)->sring = (_s); \ } while (0)

#define BACK_RING_INIT(_r, _s, __size) BACK_RING_ATTACH(_r, _s, 0, __size)

/* How big is this ring? */ -#define RING_SIZE(_r) \ +#define RING_SIZE(_r) \ ((_r)->nr_ents)

/* Number of free requests (for use on front side only). */ -#define RING_FREE_REQUESTS(_r) \ +#define RING_FREE_REQUESTS(_r) \ (RING_SIZE(_r) - ((_r)->req_prod_pvt - (_r)->rsp_cons))

/* Test if there is an empty slot available on the front ring. * (This is only meaningful from the front. ) */ -#define RING_FULL(_r) \ +#define RING_FULL(_r) \ (RING_FREE_REQUESTS(_r) == 0)

/* Test if there are outstanding messages to be processed on a ring. */ -#define RING_HAS_UNCONSUMED_RESPONSES(_r) \ +#define RING_HAS_UNCONSUMED_RESPONSES(_r) \ ((_r)->sring->rsp_prod - (_r)->rsp_cons)

-#define RING_HAS_UNCONSUMED_REQUESTS(_r) \ - ({ \ - unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \ - unsigned int rsp = RING_SIZE(_r) - \ - ((_r)->req_cons - (_r)->rsp_prod_pvt); \ - req < rsp ? req : rsp; \ - }) +#define RING_HAS_UNCONSUMED_REQUESTS(_r) ({ \ + unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \ + unsigned int rsp = RING_SIZE(_r) - \ + ((_r)->req_cons - (_r)->rsp_prod_pvt); \ + req < rsp ? req : rsp; \ +})

/* Direct access to individual ring elements, by index. */ -#define RING_GET_REQUEST(_r, _idx) \ +#define RING_GET_REQUEST(_r, _idx) \ (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req))

+#define RING_GET_RESPONSE(_r, _idx) \ + (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp)) + /* - * Get a local copy of a request. + * Get a local copy of a request/response. * - * Use this in preference to RING_GET_REQUEST() so all processing is + * Use this in preference to RING_GET_{REQUEST,RESPONSE}() so all processing is * done on a local copy that cannot be modified by the other end. * * Note that https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145 may cause this - * to be ineffective where _req is a struct which consists of only bitfields. + * to be ineffective where dest is a struct which consists of only bitfields. */ -#define RING_COPY_REQUEST(_r, _idx, _req) do { \ - /* Use volatile to force the copy into _req. */ \ - *(_req) = *(volatile typeof(_req))RING_GET_REQUEST(_r, _idx); \ +#define RING_COPY_(type, r, idx, dest) do { \ + /* Use volatile to force the copy into dest. */ \ + *(dest) = *(volatile typeof(dest))RING_GET_##type(r, idx); \ } while (0)

-#define RING_GET_RESPONSE(_r, _idx) \ - (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp)) +#define RING_COPY_REQUEST(r, idx, req) RING_COPY_(REQUEST, r, idx, req) +#define RING_COPY_RESPONSE(r, idx, rsp) RING_COPY_(RESPONSE, r, idx, rsp)

/* Loop termination condition: Would the specified index overflow the ring? */ -#define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \ +#define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \ (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r))

/* Ill-behaved frontend determination: Can there be this many requests? */ -#define RING_REQUEST_PROD_OVERFLOW(_r, _prod) \ +#define RING_REQUEST_PROD_OVERFLOW(_r, _prod) \ (((_prod) - (_r)->rsp_prod_pvt) > RING_SIZE(_r))

- -#define RING_PUSH_REQUESTS(_r) do { \ - virt_wmb(); /* back sees requests /before/ updated producer index */ \ - (_r)->sring->req_prod = (_r)->req_prod_pvt; \ +/* Ill-behaved backend determination: Can there be this many responses? */ +#define RING_RESPONSE_PROD_OVERFLOW(_r, _prod) \ + (((_prod) - (_r)->rsp_cons) > RING_SIZE(_r)) + +#define RING_PUSH_REQUESTS(_r) do { \ + virt_wmb(); /* back sees requests /before/ updated producer index */\ + (_r)->sring->req_prod = (_r)->req_prod_pvt; \ } while (0)

-#define RING_PUSH_RESPONSES(_r) do { \ - virt_wmb(); /* front sees responses /before/ updated producer index */ \ - (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \ +#define RING_PUSH_RESPONSES(_r) do { \ + virt_wmb(); /* front sees resps /before/ updated producer index */ \ + (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \ } while (0)

/* @@ -239,40 +273,40 @@ struct __name##_back_ring { \ * field appropriately. */

-#define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \ - RING_IDX __old = (_r)->sring->req_prod; \ - RING_IDX __new = (_r)->req_prod_pvt; \ - virt_wmb(); /* back sees requests /before/ updated producer index */ \ - (_r)->sring->req_prod = __new; \ - virt_mb(); /* back sees new requests /before/ we check req_event */ \ - (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \ - (RING_IDX)(__new - __old)); \ +#define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \ + RING_IDX __old = (_r)->sring->req_prod; \ + RING_IDX __new = (_r)->req_prod_pvt; \ + virt_wmb(); /* back sees requests /before/ updated producer index */\ + (_r)->sring->req_prod = __new; \ + virt_mb(); /* back sees new requests /before/ we check req_event */ \ + (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \ + (RING_IDX)(__new - __old)); \ } while (0)

-#define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \ - RING_IDX __old = (_r)->sring->rsp_prod; \ - RING_IDX __new = (_r)->rsp_prod_pvt; \ - virt_wmb(); /* front sees responses /before/ updated producer index */ \ - (_r)->sring->rsp_prod = __new; \ - virt_mb(); /* front sees new responses /before/ we check rsp_event */ \ - (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \ - (RING_IDX)(__new - __old)); \ +#define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \ + RING_IDX __old = (_r)->sring->rsp_prod; \ + RING_IDX __new = (_r)->rsp_prod_pvt; \ + virt_wmb(); /* front sees resps /before/ updated producer index */ \ + (_r)->sring->rsp_prod = __new; \ + virt_mb(); /* front sees new resps /before/ we check rsp_event */ \ + (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \ + (RING_IDX)(__new - __old)); \ } while (0)

-#define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \ - (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ - if (_work_to_do) break; \ - (_r)->sring->req_event = (_r)->req_cons + 1; \ - virt_mb(); \ - (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ +#define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \ + (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ + if (_work_to_do) break; \ + (_r)->sring->req_event = (_r)->req_cons + 1; \ + virt_mb(); \ + (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ } while (0)

-#define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \ - (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ - if (_work_to_do) break; \ - (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \ - virt_mb(); \ - (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ +#define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \ + (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ + if (_work_to_do) break; \ + (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \ + virt_mb(); \ + (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ } while (0)

From: Juergen Gross jgross@suse.com

commit 8f5a695d99000fc3aa73934d7ced33cfc64dcdab upstream.

In order to avoid a malicious backend being able to influence the local copy of a request build the request locally first and then copy it to the ring page instead of doing it the other way round as today.

Signed-off-by: Juergen Gross jgross@suse.com Reviewed-by: Jan Beulich jbeulich@suse.com Acked-by: Roger Pau Monné roger.pau@citrix.com Link: https://lore.kernel.org/r/20210730103854.12681-3-jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/block/xen-blkfront.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-)

--- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -546,7 +546,7 @@ static unsigned long blkif_ring_get_requ rinfo->shadow[id].status = REQ_WAITING; rinfo->shadow[id].associated_id = NO_ASSOCIATED_ID;

- (*ring_req)->u.rw.id = id; + rinfo->shadow[id].req.u.rw.id = id;

return id; } @@ -554,11 +554,12 @@ static unsigned long blkif_ring_get_requ static int blkif_queue_discard_req(struct request *req, struct blkfront_ring_info *rinfo) { struct blkfront_info *info = rinfo->dev_info; - struct blkif_request *ring_req; + struct blkif_request *ring_req, *final_ring_req; unsigned long id;

/* Fill out a communications ring structure. */ - id = blkif_ring_get_request(rinfo, req, &ring_req); + id = blkif_ring_get_request(rinfo, req, &final_ring_req); + ring_req = &rinfo->shadow[id].req;

ring_req->operation = BLKIF_OP_DISCARD; ring_req->u.discard.nr_sectors = blk_rq_sectors(req); @@ -569,8 +570,8 @@ static int blkif_queue_discard_req(struc else ring_req->u.discard.flag = 0;

- /* Keep a private copy so we can reissue requests when recovering. */ - rinfo->shadow[id].req = *ring_req; + /* Copy the request to the ring page. */ + *final_ring_req = *ring_req;

return 0; } @@ -703,6 +704,7 @@ static int blkif_queue_rw_req(struct req { struct blkfront_info *info = rinfo->dev_info; struct blkif_request *ring_req, *extra_ring_req = NULL; + struct blkif_request *final_ring_req, *final_extra_ring_req = NULL; unsigned long id, extra_id = NO_ASSOCIATED_ID; bool require_extra_req = false; int i; @@ -747,7 +749,8 @@ static int blkif_queue_rw_req(struct req }

/* Fill out a communications ring structure. */ - id = blkif_ring_get_request(rinfo, req, &ring_req); + id = blkif_ring_get_request(rinfo, req, &final_ring_req); + ring_req = &rinfo->shadow[id].req;

num_sg = blk_rq_map_sg(req->q, req, rinfo->shadow[id].sg); num_grant = 0; @@ -798,7 +801,9 @@ static int blkif_queue_rw_req(struct req ring_req->u.rw.nr_segments = num_grant; if (unlikely(require_extra_req)) { extra_id = blkif_ring_get_request(rinfo, req, - &extra_ring_req); + &final_extra_ring_req); + extra_ring_req = &rinfo->shadow[extra_id].req; + /* * Only the first request contains the scatter-gather * list. @@ -840,10 +845,10 @@ static int blkif_queue_rw_req(struct req if (setup.segments) kunmap_atomic(setup.segments);

- /* Keep a private copy so we can reissue requests when recovering. */ - rinfo->shadow[id].req = *ring_req; + /* Copy request(s) to the ring page. */ + *final_ring_req = *ring_req; if (unlikely(require_extra_req)) - rinfo->shadow[extra_id].req = *extra_ring_req; + *final_extra_ring_req = *extra_ring_req;

if (new_persistent_gnts) gnttab_free_grant_references(setup.gref_head);

From: Juergen Gross jgross@suse.com

commit 8446066bf8c1f9f7b7412c43fbea0fb87464d75b upstream.

In order to avoid problems in case the backend is modifying a response on the ring page while the frontend has already seen it, just read the response into a local buffer in one go and then operate on that buffer only.

Signed-off-by: Juergen Gross jgross@suse.com Reviewed-by: Jan Beulich jbeulich@suse.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/xen-netfront.c | 38 +++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 19 deletions(-)

--- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -399,13 +399,13 @@ static void xennet_tx_buf_gc(struct netf rmb(); /* Ensure we see responses up to 'rp'. */

for (cons = queue->tx.rsp_cons; cons != prod; cons++) { - struct xen_netif_tx_response *txrsp; + struct xen_netif_tx_response txrsp;

- txrsp = RING_GET_RESPONSE(&queue->tx, cons); - if (txrsp->status == XEN_NETIF_RSP_NULL) + RING_COPY_RESPONSE(&queue->tx, cons, &txrsp); + if (txrsp.status == XEN_NETIF_RSP_NULL) continue;

- id = txrsp->id; + id = txrsp.id; skb = queue->tx_skbs[id].skb; if (unlikely(gnttab_query_foreign_access( queue->grant_tx_ref[id]) != 0)) { @@ -816,7 +816,7 @@ static int xennet_get_extras(struct netf RING_IDX rp)

{ - struct xen_netif_extra_info *extra; + struct xen_netif_extra_info extra; struct device *dev = &queue->info->netdev->dev; RING_IDX cons = queue->rx.rsp_cons; int err = 0; @@ -832,24 +832,22 @@ static int xennet_get_extras(struct netf break; }

- extra = (struct xen_netif_extra_info *) - RING_GET_RESPONSE(&queue->rx, ++cons); + RING_COPY_RESPONSE(&queue->rx, ++cons, &extra);

- if (unlikely(!extra->type || - extra->type >= XEN_NETIF_EXTRA_TYPE_MAX)) { + if (unlikely(!extra.type || + extra.type >= XEN_NETIF_EXTRA_TYPE_MAX)) { if (net_ratelimit()) dev_warn(dev, "Invalid extra type: %d\n", - extra->type); + extra.type); err = -EINVAL; } else { - memcpy(&extras[extra->type - 1], extra, - sizeof(*extra)); + extras[extra.type - 1] = extra; }

skb = xennet_get_rx_skb(queue, cons); ref = xennet_get_rx_ref(queue, cons); xennet_move_rx_slot(queue, skb, ref); - } while (extra->flags & XEN_NETIF_EXTRA_FLAG_MORE); + } while (extra.flags & XEN_NETIF_EXTRA_FLAG_MORE);

queue->rx.rsp_cons = cons; return err; @@ -907,7 +905,7 @@ static int xennet_get_responses(struct n struct sk_buff_head *list, bool *need_xdp_flush) { - struct xen_netif_rx_response *rx = &rinfo->rx; + struct xen_netif_rx_response *rx = &rinfo->rx, rx_local; int max = XEN_NETIF_NR_SLOTS_MIN + (rx->status <= RX_COPY_THRESHOLD); RING_IDX cons = queue->rx.rsp_cons; struct sk_buff *skb = xennet_get_rx_skb(queue, cons); @@ -991,7 +989,8 @@ next: break; }

- rx = RING_GET_RESPONSE(&queue->rx, cons + slots); + RING_COPY_RESPONSE(&queue->rx, cons + slots, &rx_local); + rx = &rx_local; skb = xennet_get_rx_skb(queue, cons + slots); ref = xennet_get_rx_ref(queue, cons + slots); slots++; @@ -1046,10 +1045,11 @@ static int xennet_fill_frags(struct netf struct sk_buff *nskb;

while ((nskb = __skb_dequeue(list))) { - struct xen_netif_rx_response *rx = - RING_GET_RESPONSE(&queue->rx, ++cons); + struct xen_netif_rx_response rx; skb_frag_t *nfrag = &skb_shinfo(nskb)->frags[0];

+ RING_COPY_RESPONSE(&queue->rx, ++cons, &rx); + if (skb_shinfo(skb)->nr_frags == MAX_SKB_FRAGS) { unsigned int pull_to = NETFRONT_SKB_CB(skb)->pull_to;

@@ -1064,7 +1064,7 @@ static int xennet_fill_frags(struct netf

skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, skb_frag_page(nfrag), - rx->offset, rx->status, PAGE_SIZE); + rx.offset, rx.status, PAGE_SIZE);

skb_shinfo(nskb)->nr_frags = 0; kfree_skb(nskb); @@ -1163,7 +1163,7 @@ static int xennet_poll(struct napi_struc i = queue->rx.rsp_cons; work_done = 0; while ((i != rp) && (work_done < budget)) { - memcpy(rx, RING_GET_RESPONSE(&queue->rx, i), sizeof(*rx)); + RING_COPY_RESPONSE(&queue->rx, i, rx); memset(extras, 0, sizeof(rinfo.extras));

err = xennet_get_responses(queue, &rinfo, rp, &tmpq,

From: Juergen Gross jgross@suse.com

commit 21631d2d741a64a073e167c27769e73bc7844a2f upstream.

The tx_skb_freelist elements are in a single linked list with the request id used as link reference. The per element link field is in a union with the skb pointer of an in use request.

Move the link reference out of the union in order to enable a later reuse of it for requests which need a populated skb pointer.

Rename add_id_to_freelist() and get_id_from_freelist() to add_id_to_list() and get_id_from_list() in order to prepare using those for other lists as well. Define ~0 as value to indicate the end of a list and place that value into the link for a request not being on the list.

When freeing a skb zero the skb pointer in the request. Use a NULL value of the skb pointer instead of skb_entry_is_link() for deciding whether a request has a skb linked to it.

Remove skb_entry_set_link() and open code it instead as it is really trivial now.

Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/xen-netfront.c | 61 ++++++++++++++++++--------------------------- 1 file changed, 25 insertions(+), 36 deletions(-)

--- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -126,17 +126,11 @@ struct netfront_queue {

/* * {tx,rx}_skbs store outstanding skbuffs. Free tx_skb entries - * are linked from tx_skb_freelist through skb_entry.link. - * - * NB. Freelist index entries are always going to be less than - * PAGE_OFFSET, whereas pointers to skbs will always be equal or - * greater than PAGE_OFFSET: we use this property to distinguish - * them. + * are linked from tx_skb_freelist through tx_link. */ - union skb_entry { - struct sk_buff *skb; - unsigned long link; - } tx_skbs[NET_TX_RING_SIZE]; + struct sk_buff *tx_skbs[NET_TX_RING_SIZE]; + unsigned short tx_link[NET_TX_RING_SIZE]; +#define TX_LINK_NONE 0xffff grant_ref_t gref_tx_head; grant_ref_t grant_tx_ref[NET_TX_RING_SIZE]; struct page *grant_tx_page[NET_TX_RING_SIZE]; @@ -181,33 +175,25 @@ struct netfront_rx_info { struct xen_netif_extra_info extras[XEN_NETIF_EXTRA_TYPE_MAX - 1]; };

-static void skb_entry_set_link(union skb_entry *list, unsigned short id) -{ - list->link = id; -} - -static int skb_entry_is_link(const union skb_entry *list) -{ - BUILD_BUG_ON(sizeof(list->skb) != sizeof(list->link)); - return (unsigned long)list->skb < PAGE_OFFSET; -} - /* * Access macros for acquiring freeing slots in tx_skbs[]. */

-static void add_id_to_freelist(unsigned *head, union skb_entry *list, - unsigned short id) +static void add_id_to_list(unsigned *head, unsigned short *list, + unsigned short id) { - skb_entry_set_link(&list[id], *head); + list[id] = *head; *head = id; }

-static unsigned short get_id_from_freelist(unsigned *head, - union skb_entry *list) +static unsigned short get_id_from_list(unsigned *head, unsigned short *list) { unsigned int id = *head; - *head = list[id].link; + + if (id != TX_LINK_NONE) { + *head = list[id]; + list[id] = TX_LINK_NONE; + } return id; }

@@ -406,7 +392,8 @@ static void xennet_tx_buf_gc(struct netf continue;

id = txrsp.id; - skb = queue->tx_skbs[id].skb; + skb = queue->tx_skbs[id]; + queue->tx_skbs[id] = NULL; if (unlikely(gnttab_query_foreign_access( queue->grant_tx_ref[id]) != 0)) { pr_alert("%s: warning -- grant still in use by backend domain\n", @@ -419,7 +406,7 @@ static void xennet_tx_buf_gc(struct netf &queue->gref_tx_head, queue->grant_tx_ref[id]); queue->grant_tx_ref[id] = GRANT_INVALID_REF; queue->grant_tx_page[id] = NULL; - add_id_to_freelist(&queue->tx_skb_freelist, queue->tx_skbs, id); + add_id_to_list(&queue->tx_skb_freelist, queue->tx_link, id); dev_kfree_skb_irq(skb); }

@@ -452,7 +439,7 @@ static void xennet_tx_setup_grant(unsign struct netfront_queue *queue = info->queue; struct sk_buff *skb = info->skb;

- id = get_id_from_freelist(&queue->tx_skb_freelist, queue->tx_skbs); + id = get_id_from_list(&queue->tx_skb_freelist, queue->tx_link); tx = RING_GET_REQUEST(&queue->tx, queue->tx.req_prod_pvt++); ref = gnttab_claim_grant_reference(&queue->gref_tx_head); WARN_ON_ONCE(IS_ERR_VALUE((unsigned long)(int)ref)); @@ -460,7 +447,7 @@ static void xennet_tx_setup_grant(unsign gnttab_grant_foreign_access_ref(ref, queue->info->xbdev->otherend_id, gfn, GNTMAP_readonly);

- queue->tx_skbs[id].skb = skb; + queue->tx_skbs[id] = skb; queue->grant_tx_page[id] = page; queue->grant_tx_ref[id] = ref;

@@ -1286,17 +1273,18 @@ static void xennet_release_tx_bufs(struc

for (i = 0; i < NET_TX_RING_SIZE; i++) { /* Skip over entries which are actually freelist references */ - if (skb_entry_is_link(&queue->tx_skbs[i])) + if (!queue->tx_skbs[i]) continue;

- skb = queue->tx_skbs[i].skb; + skb = queue->tx_skbs[i]; + queue->tx_skbs[i] = NULL; get_page(queue->grant_tx_page[i]); gnttab_end_foreign_access(queue->grant_tx_ref[i], GNTMAP_readonly, (unsigned long)page_address(queue->grant_tx_page[i])); queue->grant_tx_page[i] = NULL; queue->grant_tx_ref[i] = GRANT_INVALID_REF; - add_id_to_freelist(&queue->tx_skb_freelist, queue->tx_skbs, i); + add_id_to_list(&queue->tx_skb_freelist, queue->tx_link, i); dev_kfree_skb_irq(skb); } } @@ -1857,13 +1845,14 @@ static int xennet_init_queue(struct netf snprintf(queue->name, sizeof(queue->name), "vif%s-q%u", devid, queue->id);

- /* Initialise tx_skbs as a free chain containing every entry. */ + /* Initialise tx_skb_freelist as a free chain containing every entry. */ queue->tx_skb_freelist = 0; for (i = 0; i < NET_TX_RING_SIZE; i++) { - skb_entry_set_link(&queue->tx_skbs[i], i+1); + queue->tx_link[i] = i + 1; queue->grant_tx_ref[i] = GRANT_INVALID_REF; queue->grant_tx_page[i] = NULL; } + queue->tx_link[NET_TX_RING_SIZE - 1] = TX_LINK_NONE;

/* Clear out rx_skbs */ for (i = 0; i < NET_RX_RING_SIZE; i++) {

From: Juergen Gross jgross@suse.com

commit e679004dec37566f658a255157d3aed9d762a2b7 upstream.

Xen frontends shouldn't BUG() in case of illegal data received from their backends. So replace the BUG_ON()s when reading illegal data from the ring page with negative return values.

Reviewed-by: Jan Beulich jbeulich@suse.com Signed-off-by: Juergen Gross jgross@suse.com Link: https://lore.kernel.org/r/20210707091045.460-1-jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/tty/hvc/hvc_xen.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)

--- a/drivers/tty/hvc/hvc_xen.c +++ b/drivers/tty/hvc/hvc_xen.c @@ -86,7 +86,11 @@ static int __write_console(struct xencon cons = intf->out_cons; prod = intf->out_prod; mb(); /* update queue values before going on */ - BUG_ON((prod - cons) > sizeof(intf->out)); + + if ((prod - cons) > sizeof(intf->out)) { + pr_err_once("xencons: Illegal ring page indices"); + return -EINVAL; + }

while ((sent < len) && ((prod - cons) < sizeof(intf->out))) intf->out[MASK_XENCONS_IDX(prod++, intf->out)] = data[sent++]; @@ -114,7 +118,10 @@ static int domU_write_console(uint32_t v */ while (len) { int sent = __write_console(cons, data, len); - + + if (sent < 0) + return sent; + data += sent; len -= sent;

@@ -138,7 +145,11 @@ static int domU_read_console(uint32_t vt cons = intf->in_cons; prod = intf->in_prod; mb(); /* get pointers before reading ring */ - BUG_ON((prod - cons) > sizeof(intf->in)); + + if ((prod - cons) > sizeof(intf->in)) { + pr_err_once("xencons: Illegal ring page indices"); + return -EINVAL; + }

while (cons != prod && recv < len) buf[recv++] = intf->in[MASK_XENCONS_IDX(cons++, intf->in)];

From: Alexander Mikhalitsyn alexander.mikhalitsyn@virtuozzo.com

commit 85b6d24646e4125c591639841169baa98a2da503 upstream.

Currently, the exit_shm() function not designed to work properly when task->sysvshm.shm_clist holds shm objects from different IPC namespaces.

This is a real pain when sysctl kernel.shm_rmid_forced = 1, because it leads to use-after-free (reproducer exists).

This is an attempt to fix the problem by extending exit_shm mechanism to handle shm's destroy from several IPC ns'es.

To achieve that we do several things:

1. add a namespace (non-refcounted) pointer to the struct shmid_kernel

2. during new shm object creation (newseg()/shmget syscall) we initialize this pointer by current task IPC ns

3. exit_shm() fully reworked such that it traverses over all shp's in task->sysvshm.shm_clist and gets IPC namespace not from current task as it was before but from shp's object itself, then call shm_destroy(shp, ns).

Note: We need to be really careful here, because as it was said before (1), our pointer to IPC ns non-refcnt'ed. To be on the safe side we using special helper get_ipc_ns_not_zero() which allows to get IPC ns refcounter only if IPC ns not in the "state of destruction".

Q/A

Q: Why can we access shp->ns memory using non-refcounted pointer? A: Because shp object lifetime is always shorther than IPC namespace lifetime, so, if we get shp object from the task->sysvshm.shm_clist while holding task_lock(task) nobody can steal our namespace.

Q: Does this patch change semantics of unshare/setns/clone syscalls? A: No. It's just fixes non-covered case when process may leave IPC namespace without getting task->sysvshm.shm_clist list cleaned up.

Link: https://lkml.kernel.org/r/67bb03e5-f79c-1815-e2bf-949c67047418@colorfullife.... Link: https://lkml.kernel.org/r/20211109151501.4921-1-manfred@colorfullife.com Fixes: ab602f79915 ("shm: make exit_shm work proportional to task activity") Co-developed-by: Manfred Spraul manfred@colorfullife.com Signed-off-by: Manfred Spraul manfred@colorfullife.com Signed-off-by: Alexander Mikhalitsyn alexander.mikhalitsyn@virtuozzo.com Cc: "Eric W. Biederman" ebiederm@xmission.com Cc: Davidlohr Bueso dave@stgolabs.net Cc: Greg KH gregkh@linuxfoundation.org Cc: Andrei Vagin avagin@gmail.com Cc: Pavel Tikhomirov ptikhomirov@virtuozzo.com Cc: Vasily Averin vvs@virtuozzo.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- include/linux/ipc_namespace.h | 15 +++ include/linux/sched/task.h | 2 ipc/shm.c | 189 +++++++++++++++++++++++++++++++----------- 3 files changed, 159 insertions(+), 47 deletions(-)

--- a/include/linux/ipc_namespace.h +++ b/include/linux/ipc_namespace.h @@ -132,6 +132,16 @@ static inline struct ipc_namespace *get_ return ns; }

+static inline struct ipc_namespace *get_ipc_ns_not_zero(struct ipc_namespace *ns) +{ + if (ns) { + if (refcount_inc_not_zero(&ns->count)) + return ns; + } + + return NULL; +} + extern void put_ipc_ns(struct ipc_namespace *ns); #else static inline struct ipc_namespace *copy_ipcs(unsigned long flags, @@ -147,6 +157,11 @@ static inline struct ipc_namespace *get_ { return ns; } + +static inline struct ipc_namespace *get_ipc_ns_not_zero(struct ipc_namespace *ns) +{ + return ns; +}

static inline void put_ipc_ns(struct ipc_namespace *ns) { --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -158,7 +158,7 @@ static inline struct vm_struct *task_sta * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring * subscriptions and synchronises with wait4(). Also used in procfs. Also * pins the final release of task.io_context. Also protects ->cpuset and - * ->cgroup.subsys[]. And ->vfork_done. + * ->cgroup.subsys[]. And ->vfork_done. And ->sysvshm.shm_clist. * * Nests both inside and outside of read_lock(&tasklist_lock). * It must not be nested with write_lock_irq(&tasklist_lock), --- a/ipc/shm.c +++ b/ipc/shm.c @@ -62,9 +62,18 @@ struct shmid_kernel /* private to the ke struct pid *shm_lprid; struct user_struct *mlock_user;

- /* The task created the shm object. NULL if the task is dead. */ + /* + * The task created the shm object, for + * task_lock(shp->shm_creator) + */ struct task_struct *shm_creator; - struct list_head shm_clist; /* list by creator */ + + /* + * List by creator. task_lock(->shm_creator) required for read/write. + * If list_empty(), then the creator is dead already. + */ + struct list_head shm_clist; + struct ipc_namespace *ns; } __randomize_layout;

/* shm_mode upper byte flags */ @@ -115,6 +124,7 @@ static void do_shm_rmid(struct ipc_names struct shmid_kernel *shp;

shp = container_of(ipcp, struct shmid_kernel, shm_perm); + WARN_ON(ns != shp->ns);

if (shp->shm_nattch) { shp->shm_perm.mode |= SHM_DEST; @@ -225,10 +235,43 @@ static void shm_rcu_free(struct rcu_head kvfree(shp); }

-static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s) +/* + * It has to be called with shp locked. + * It must be called before ipc_rmid() + */ +static inline void shm_clist_rm(struct shmid_kernel *shp) +{ + struct task_struct *creator; + + /* ensure that shm_creator does not disappear */ + rcu_read_lock(); + + /* + * A concurrent exit_shm may do a list_del_init() as well. + * Just do nothing if exit_shm already did the work + */ + if (!list_empty(&shp->shm_clist)) { + /* + * shp->shm_creator is guaranteed to be valid *only* + * if shp->shm_clist is not empty. + */ + creator = shp->shm_creator; + + task_lock(creator); + /* + * list_del_init() is a nop if the entry was already removed + * from the list. + */ + list_del_init(&shp->shm_clist); + task_unlock(creator); + } + rcu_read_unlock(); +} + +static inline void shm_rmid(struct shmid_kernel *s) { - list_del(&s->shm_clist); - ipc_rmid(&shm_ids(ns), &s->shm_perm); + shm_clist_rm(s); + ipc_rmid(&shm_ids(s->ns), &s->shm_perm); }

@@ -283,7 +326,7 @@ static void shm_destroy(struct ipc_names shm_file = shp->shm_file; shp->shm_file = NULL; ns->shm_tot -= (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT; - shm_rmid(ns, shp); + shm_rmid(shp); shm_unlock(shp); if (!is_file_hugepages(shm_file)) shmem_lock(shm_file, 0, shp->mlock_user); @@ -306,10 +349,10 @@ static void shm_destroy(struct ipc_names * * 2) sysctl kernel.shm_rmid_forced is set to 1. */ -static bool shm_may_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp) +static bool shm_may_destroy(struct shmid_kernel *shp) { return (shp->shm_nattch == 0) && - (ns->shm_rmid_forced || + (shp->ns->shm_rmid_forced || (shp->shm_perm.mode & SHM_DEST)); }

@@ -340,7 +383,7 @@ static void shm_close(struct vm_area_str ipc_update_pid(&shp->shm_lprid, task_tgid(current)); shp->shm_dtim = ktime_get_real_seconds(); shp->shm_nattch--; - if (shm_may_destroy(ns, shp)) + if (shm_may_destroy(shp)) shm_destroy(ns, shp); else shm_unlock(shp); @@ -361,10 +404,10 @@ static int shm_try_destroy_orphaned(int * * As shp->* are changed under rwsem, it's safe to skip shp locking. */ - if (shp->shm_creator != NULL) + if (!list_empty(&shp->shm_clist)) return 0;

- if (shm_may_destroy(ns, shp)) { + if (shm_may_destroy(shp)) { shm_lock_by_ptr(shp); shm_destroy(ns, shp); } @@ -382,48 +425,97 @@ void shm_destroy_orphaned(struct ipc_nam /* Locking assumes this will only be called with task == current */ void exit_shm(struct task_struct *task) { - struct ipc_namespace *ns = task->nsproxy->ipc_ns; - struct shmid_kernel *shp, *n; + for (;;) { + struct shmid_kernel *shp; + struct ipc_namespace *ns;

- if (list_empty(&task->sysvshm.shm_clist)) - return; + task_lock(task); + + if (list_empty(&task->sysvshm.shm_clist)) { + task_unlock(task); + break; + } + + shp = list_first_entry(&task->sysvshm.shm_clist, struct shmid_kernel, + shm_clist);

- /* - * If kernel.shm_rmid_forced is not set then only keep track of - * which shmids are orphaned, so that a later set of the sysctl - * can clean them up. - */ - if (!ns->shm_rmid_forced) { - down_read(&shm_ids(ns).rwsem); - list_for_each_entry(shp, &task->sysvshm.shm_clist, shm_clist) - shp->shm_creator = NULL; /* - * Only under read lock but we are only called on current - * so no entry on the list will be shared. + * 1) Get pointer to the ipc namespace. It is worth to say + * that this pointer is guaranteed to be valid because + * shp lifetime is always shorter than namespace lifetime + * in which shp lives. + * We taken task_lock it means that shp won't be freed. */ - list_del(&task->sysvshm.shm_clist); - up_read(&shm_ids(ns).rwsem); - return; - } + ns = shp->ns;

- /* - * Destroy all already created segments, that were not yet mapped, - * and mark any mapped as orphan to cover the sysctl toggling. - * Destroy is skipped if shm_may_destroy() returns false. - */ - down_write(&shm_ids(ns).rwsem); - list_for_each_entry_safe(shp, n, &task->sysvshm.shm_clist, shm_clist) { - shp->shm_creator = NULL; + /* + * 2) If kernel.shm_rmid_forced is not set then only keep track of + * which shmids are orphaned, so that a later set of the sysctl + * can clean them up. + */ + if (!ns->shm_rmid_forced) + goto unlink_continue;

- if (shm_may_destroy(ns, shp)) { - shm_lock_by_ptr(shp); - shm_destroy(ns, shp); + /* + * 3) get a reference to the namespace. + * The refcount could be already 0. If it is 0, then + * the shm objects will be free by free_ipc_work(). + */ + ns = get_ipc_ns_not_zero(ns); + if (!ns) { +unlink_continue: + list_del_init(&shp->shm_clist); + task_unlock(task); + continue; } - }

- /* Remove the list head from any segments still attached. */ - list_del(&task->sysvshm.shm_clist); - up_write(&shm_ids(ns).rwsem); + /* + * 4) get a reference to shp. + * This cannot fail: shm_clist_rm() is called before + * ipc_rmid(), thus the refcount cannot be 0. + */ + WARN_ON(!ipc_rcu_getref(&shp->shm_perm)); + + /* + * 5) unlink the shm segment from the list of segments + * created by current. + * This must be done last. After unlinking, + * only the refcounts obtained above prevent IPC_RMID + * from destroying the segment or the namespace. + */ + list_del_init(&shp->shm_clist); + + task_unlock(task); + + /* + * 6) we have all references + * Thus lock & if needed destroy shp. + */ + down_write(&shm_ids(ns).rwsem); + shm_lock_by_ptr(shp); + /* + * rcu_read_lock was implicitly taken in shm_lock_by_ptr, it's + * safe to call ipc_rcu_putref here + */ + ipc_rcu_putref(&shp->shm_perm, shm_rcu_free); + + if (ipc_valid_object(&shp->shm_perm)) { + if (shm_may_destroy(shp)) + shm_destroy(ns, shp); + else + shm_unlock(shp); + } else { + /* + * Someone else deleted the shp from namespace + * idr/kht while we have waited. + * Just unlock and continue. + */ + shm_unlock(shp); + } + + up_write(&shm_ids(ns).rwsem); + put_ipc_ns(ns); /* paired with get_ipc_ns_not_zero */ + } }

static vm_fault_t shm_fault(struct vm_fault *vmf) @@ -680,7 +772,11 @@ static int newseg(struct ipc_namespace * if (error < 0) goto no_id;

+ shp->ns = ns; + + task_lock(current); list_add(&shp->shm_clist, &current->sysvshm.shm_clist); + task_unlock(current);

/* * shmid gets reported as "inode#" in /proc/pid/maps. @@ -1573,7 +1669,8 @@ out_nattch: down_write(&shm_ids(ns).rwsem); shp = shm_lock(ns, shmid); shp->shm_nattch--; - if (shm_may_destroy(ns, shp)) + + if (shm_may_destroy(shp)) shm_destroy(ns, shp); else shm_unlock(shp);

From: Alex Deucher alexander.deucher@amd.com

commit 53af98c091bc42fd9ec64cfabc40da4e5f3aae93 upstream.

Renoir and newer gfx9 APUs have new TSC register that is not part of the gfxoff tile, so it can be read without needing to disable gfx off.

Acked-by: Luben Tuikov luben.tuikov@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 46 +++++++++++++++++++++++++--------- 1 file changed, 35 insertions(+), 11 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -137,6 +137,11 @@ MODULE_FIRMWARE("amdgpu/green_sardine_rl #define mmTCP_CHAN_STEER_5_ARCT 0x0b0c #define mmTCP_CHAN_STEER_5_ARCT_BASE_IDX 0

+#define mmGOLDEN_TSC_COUNT_UPPER_Renoir 0x0025 +#define mmGOLDEN_TSC_COUNT_UPPER_Renoir_BASE_IDX 1 +#define mmGOLDEN_TSC_COUNT_LOWER_Renoir 0x0026 +#define mmGOLDEN_TSC_COUNT_LOWER_Renoir_BASE_IDX 1 + enum ta_ras_gfx_subblock { /*CPC*/ TA_RAS_BLOCK__GFX_CPC_INDEX_START = 0, @@ -4147,19 +4152,38 @@ failed_kiq_read:

static uint64_t gfx_v9_0_get_gpu_clock_counter(struct amdgpu_device *adev) { - uint64_t clock; + uint64_t clock, clock_lo, clock_hi, hi_check;

- amdgpu_gfx_off_ctrl(adev, false); - mutex_lock(&adev->gfx.gpu_clock_mutex); - if (adev->asic_type == CHIP_VEGA10 && amdgpu_sriov_runtime(adev)) { - clock = gfx_v9_0_kiq_read_clock(adev); - } else { - WREG32_SOC15(GC, 0, mmRLC_CAPTURE_GPU_CLOCK_COUNT, 1); - clock = (uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_LSB) | - ((uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_MSB) << 32ULL); + switch (adev->asic_type) { + case CHIP_RENOIR: + preempt_disable(); + clock_hi = RREG32_SOC15_NO_KIQ(SMUIO, 0, mmGOLDEN_TSC_COUNT_UPPER_Renoir); + clock_lo = RREG32_SOC15_NO_KIQ(SMUIO, 0, mmGOLDEN_TSC_COUNT_LOWER_Renoir); + hi_check = RREG32_SOC15_NO_KIQ(SMUIO, 0, mmGOLDEN_TSC_COUNT_UPPER_Renoir); + /* The SMUIO TSC clock frequency is 100MHz, which sets 32-bit carry over + * roughly every 42 seconds. + */ + if (hi_check != clock_hi) { + clock_lo = RREG32_SOC15_NO_KIQ(SMUIO, 0, mmGOLDEN_TSC_COUNT_LOWER_Renoir); + clock_hi = hi_check; + } + preempt_enable(); + clock = clock_lo | (clock_hi << 32ULL); + break; + default: + amdgpu_gfx_off_ctrl(adev, false); + mutex_lock(&adev->gfx.gpu_clock_mutex); + if (adev->asic_type == CHIP_VEGA10 && amdgpu_sriov_runtime(adev)) { + clock = gfx_v9_0_kiq_read_clock(adev); + } else { + WREG32_SOC15(GC, 0, mmRLC_CAPTURE_GPU_CLOCK_COUNT, 1); + clock = (uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_LSB) | + ((uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_MSB) << 32ULL); + } + mutex_unlock(&adev->gfx.gpu_clock_mutex); + amdgpu_gfx_off_ctrl(adev, true); + break; } - mutex_unlock(&adev->gfx.gpu_clock_mutex); - amdgpu_gfx_off_ctrl(adev, true); return clock; }