From: Hans de Goede hdegoede@redhat.com

[ Upstream commit b1884583fcd17d6a1b1bba94bbb5826e6b5c6e17 ]

The i8042 module exports several symbols which may be used by other modules.

Before this commit it would refuse to load (when built as a module itself) on systems without an i8042 controller.

This is a problem specifically for the asus-nb-wmi module. Many Asus laptops support the Asus WMI interface. Some of them have an i8042 controller and need to use i8042_install_filter() to filter some kbd events. Other models do not have an i8042 controller (e.g. they use an USB attached kbd).

Before this commit the asus-nb-wmi driver could not be loaded on Asus models without an i8042 controller, when the i8042 code was built as a module (as Arch Linux does) because the module_init function of the i8042 module would fail with -ENODEV and thus the i8042_install_filter symbol could not be loaded.

This commit fixes this by exiting from module_init with a return code of 0 if no controller is found. It also adds a i8042_present bool to make the module_exit function a no-op in this case and also adds a check for i8042_present to the exported i8042_command function.

The latter i8042_present check should not really be necessary because when builtin that function can already be used on systems without an i8042 controller, but better safe then sorry.

Reported-and-tested-by: Marius Iacob themariusus@gmail.com Signed-off-by: Hans de Goede hdegoede@redhat.com Link: https://lore.kernel.org/r/20201008112628.3979-2-hdegoede@redhat.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/serio/i8042.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index c84c685056b99..6b648339733fa 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -125,6 +125,7 @@ module_param_named(unmask_kbd_data, i8042_unmask_kbd_data, bool, 0600); MODULE_PARM_DESC(unmask_kbd_data, "Unconditional enable (may reveal sensitive data) of normally sanitize-filtered kbd data traffic debug log [pre-condition: i8042.debug=1 enabled]"); #endif

+static bool i8042_present; static bool i8042_bypass_aux_irq_test; static char i8042_kbd_firmware_id[128]; static char i8042_aux_firmware_id[128]; @@ -343,6 +344,9 @@ int i8042_command(unsigned char *param, int command) unsigned long flags; int retval;

+ if (!i8042_present) + return -1; + spin_lock_irqsave(&i8042_lock, flags); retval = __i8042_command(param, command); spin_unlock_irqrestore(&i8042_lock, flags); @@ -1597,12 +1601,15 @@ static int __init i8042_init(void)

err = i8042_platform_init(); if (err) - return err; + return (err == -ENODEV) ? 0 : err;

err = i8042_controller_check(); if (err) goto err_platform_exit;

+ /* Set this before creating the dev to allow i8042_command to work right away */ + i8042_present = true; + pdev = platform_create_bundle(&i8042_driver, i8042_probe, NULL, 0, NULL, 0); if (IS_ERR(pdev)) { err = PTR_ERR(pdev); @@ -1621,6 +1628,9 @@ static int __init i8042_init(void)

static void __exit i8042_exit(void) { + if (!i8042_present) + return; + platform_device_unregister(i8042_platform_device); platform_driver_unregister(&i8042_driver); i8042_platform_exit();

From: Marc Ferland ferlandm@amotus.ca

[ Upstream commit 0ba2df09f1500d3f27398a3382b86d39c3e6abe2 ]

The xilinx_dma_poll_timeout macro is sometimes called while holding a spinlock (see xilinx_dma_issue_pending() for an example) this means we shouldn't sleep when polling the dma channel registers. To address it in xilinx poll timeout macro use readl_poll_timeout_atomic instead of readl_poll_timeout variant.

Signed-off-by: Marc Ferland ferlandm@amotus.ca Signed-off-by: Radhey Shyam Pandey radhey.shyam.pandey@xilinx.com Link: https://lore.kernel.org/r/1604473206-32573-2-git-send-email-radhey.shyam.pan... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/xilinx/xilinx_dma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index cd271f7826051..ef99ef0bb1ca2 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -420,8 +420,8 @@ struct xilinx_dma_device { #define to_dma_tx_descriptor(tx) \ container_of(tx, struct xilinx_dma_tx_descriptor, async_tx) #define xilinx_dma_poll_timeout(chan, reg, val, cond, delay_us, timeout_us) \ - readl_poll_timeout(chan->xdev->regs + chan->ctrl_offset + reg, val, \ - cond, delay_us, timeout_us) + readl_poll_timeout_atomic(chan->xdev->regs + chan->ctrl_offset + reg, \ + val, cond, delay_us, timeout_us)

/* IO accessors */ static inline u32 dma_read(struct xilinx_dma_chan *chan, u32 reg)

From: Jens Axboe axboe@kernel.dk

[ Upstream commit 8d4c3e76e3be11a64df95ddee52e99092d42fc19 ]

If this is attempted by a kthread, then return -EOPNOTSUPP as we don't currently support that. Once we can get task_pid_ptr() doing the right thing, then this can go away again.

Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/proc/self.c | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/fs/proc/self.c b/fs/proc/self.c index c8bbc1c84a39a..f6e2e3fb8a226 100644 --- a/fs/proc/self.c +++ b/fs/proc/self.c @@ -26,6 +26,13 @@ static const char *proc_self_get_link(struct dentry *dentry, pid_t tgid = task_tgid_nr_ns(current, ns); char *name;

+ /* + * Not currently supported. Once we can inherit all of struct pid, + * we can allow this. + */ + if (current->flags & PF_KTHREAD) + return ERR_PTR(-EOPNOTSUPP); + if (!tgid) return ERR_PTR(-ENOENT); /* 11 for max length of signed int in decimal + NULL term */

From: Lee Duncan lduncan@suse.com

[ Upstream commit fe0a8a95e7134d0b44cd407bc0085b9ba8d8fe31 ]

iSCSI NOPs are sometimes "lost", mistakenly sent to the user-land iscsid daemon instead of handled in the kernel, as they should be, resulting in a message from the daemon like:

iscsid: Got nop in, but kernel supports nop handling.

This can occur because of the new forward- and back-locks, and the fact that an iSCSI NOP response can occur before processing of the NOP send is complete. This can result in "conn->ping_task" being NULL in iscsi_nop_out_rsp(), when the pointer is actually in the process of being set.

To work around this, we add a new state to the "ping_task" pointer. In addition to NULL (not assigned) and a pointer (assigned), we add the state "being set", which is signaled with an INVALID pointer (using "-1").

Link: https://lore.kernel.org/r/20201106193317.16993-1-leeman.duncan@gmail.com Reviewed-by: Mike Christie michael.christie@oracle.com Signed-off-by: Lee Duncan lduncan@suse.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/libiscsi.c | 23 +++++++++++++++-------- include/scsi/libiscsi.h | 3 +++ 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index c4336b01db23c..a84b473d4a08b 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -570,8 +570,8 @@ static void iscsi_complete_task(struct iscsi_task *task, int state) if (conn->task == task) conn->task = NULL;

- if (conn->ping_task == task) - conn->ping_task = NULL; + if (READ_ONCE(conn->ping_task) == task) + WRITE_ONCE(conn->ping_task, NULL);

/* release get from queueing */ __iscsi_put_task(task); @@ -780,6 +780,9 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, task->conn->session->age); }

+ if (unlikely(READ_ONCE(conn->ping_task) == INVALID_SCSI_TASK)) + WRITE_ONCE(conn->ping_task, task); + if (!ihost->workq) { if (iscsi_prep_mgmt_task(conn, task)) goto free_task; @@ -987,8 +990,11 @@ static int iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr) struct iscsi_nopout hdr; struct iscsi_task *task;

- if (!rhdr && conn->ping_task) - return -EINVAL; + if (!rhdr) { + if (READ_ONCE(conn->ping_task)) + return -EINVAL; + WRITE_ONCE(conn->ping_task, INVALID_SCSI_TASK); + }

memset(&hdr, 0, sizeof(struct iscsi_nopout)); hdr.opcode = ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE; @@ -1003,11 +1009,12 @@ static int iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr)

task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0); if (!task) { + if (!rhdr) + WRITE_ONCE(conn->ping_task, NULL); iscsi_conn_printk(KERN_ERR, conn, "Could not send nopout\n"); return -EIO; } else if (!rhdr) { /* only track our nops */ - conn->ping_task = task; conn->last_ping = jiffies; }

@@ -1020,7 +1027,7 @@ static int iscsi_nop_out_rsp(struct iscsi_task *task, struct iscsi_conn *conn = task->conn; int rc = 0;

- if (conn->ping_task != task) { + if (READ_ONCE(conn->ping_task) != task) { /* * If this is not in response to one of our * nops then it must be from userspace. @@ -1960,7 +1967,7 @@ static void iscsi_start_tx(struct iscsi_conn *conn) */ static int iscsi_has_ping_timed_out(struct iscsi_conn *conn) { - if (conn->ping_task && + if (READ_ONCE(conn->ping_task) && time_before_eq(conn->last_recv + (conn->recv_timeout * HZ) + (conn->ping_timeout * HZ), jiffies)) return 1; @@ -2095,7 +2102,7 @@ static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc) * Checking the transport already or nop from a cmd timeout still * running */ - if (conn->ping_task) { + if (READ_ONCE(conn->ping_task)) { task->have_checked_conn = true; rc = BLK_EH_RESET_TIMER; goto done; diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index c7b1dc713cdd7..9c7f4aad6db66 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -144,6 +144,9 @@ struct iscsi_task { void *dd_data; /* driver/transport data */ };

+/* invalid scsi_task pointer */ +#define INVALID_SCSI_TASK (struct iscsi_task *)-1l + static inline int iscsi_task_has_unsol_data(struct iscsi_task *task) { return task->unsol_r2t.data_length > task->unsol_r2t.sent;

From: Sami Tolvanen samitolvanen@google.com

[ Upstream commit ebd19fc372e3e78bf165f230e7c084e304441c08 ]

This change switches rapl to use PMU_FORMAT_ATTR, and fixes two other macros to use device_attribute instead of kobj_attribute to avoid callback type mismatches that trip indirect call checking with Clang's Control-Flow Integrity (CFI).

Reported-by: Sedat Dilek sedat.dilek@gmail.com Signed-off-by: Sami Tolvanen samitolvanen@google.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Reviewed-by: Kees Cook keescook@chromium.org Link: https://lkml.kernel.org/r/20201113183126.1239404-1-samitolvanen@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/events/intel/cstate.c | 6 +++--- arch/x86/events/intel/rapl.c | 14 +------------- arch/x86/events/intel/uncore.c | 4 ++-- arch/x86/events/intel/uncore.h | 12 ++++++------ 4 files changed, 12 insertions(+), 24 deletions(-)

diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events/intel/cstate.c index 72d09340c24d2..88ba013d08d49 100644 --- a/arch/x86/events/intel/cstate.c +++ b/arch/x86/events/intel/cstate.c @@ -98,14 +98,14 @@ MODULE_LICENSE("GPL");

#define DEFINE_CSTATE_FORMAT_ATTR(_var, _name, _format) \ -static ssize_t __cstate_##_var##_show(struct kobject *kobj, \ - struct kobj_attribute *attr, \ +static ssize_t __cstate_##_var##_show(struct device *dev, \ + struct device_attribute *attr, \ char *page) \ { \ BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ return sprintf(page, _format "\n"); \ } \ -static struct kobj_attribute format_attr_##_var = \ +static struct device_attribute format_attr_##_var = \ __ATTR(_name, 0444, __cstate_##_var##_show, NULL)

static ssize_t cstate_get_attr_cpumask(struct device *dev, diff --git a/arch/x86/events/intel/rapl.c b/arch/x86/events/intel/rapl.c index 4c1b7ea185415..38dae3d1391b5 100644 --- a/arch/x86/events/intel/rapl.c +++ b/arch/x86/events/intel/rapl.c @@ -115,18 +115,6 @@ static const char *const rapl_domain_names[NR_RAPL_DOMAINS] __initconst = { * any other bit is reserved */ #define RAPL_EVENT_MASK 0xFFULL - -#define DEFINE_RAPL_FORMAT_ATTR(_var, _name, _format) \ -static ssize_t __rapl_##_var##_show(struct kobject *kobj, \ - struct kobj_attribute *attr, \ - char *page) \ -{ \ - BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ - return sprintf(page, _format "\n"); \ -} \ -static struct kobj_attribute format_attr_##_var = \ - __ATTR(_name, 0444, __rapl_##_var##_show, NULL) - #define RAPL_CNTR_WIDTH 32

#define RAPL_EVENT_ATTR_STR(_name, v, str) \ @@ -548,7 +536,7 @@ static struct attribute_group rapl_pmu_events_group = { .attrs = NULL, /* patched at runtime */ };

-DEFINE_RAPL_FORMAT_ATTR(event, event, "config:0-7"); +PMU_FORMAT_ATTR(event, "config:0-7"); static struct attribute *rapl_formats_attr[] = { &format_attr_event.attr, NULL, diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c index 4f365267b12fe..9f572bf6c6216 100644 --- a/arch/x86/events/intel/uncore.c +++ b/arch/x86/events/intel/uncore.c @@ -90,8 +90,8 @@ struct pci2phy_map *__find_pci2phy_map(int segment) return map; }

-ssize_t uncore_event_show(struct kobject *kobj, - struct kobj_attribute *attr, char *buf) +ssize_t uncore_event_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct uncore_event_desc *event = container_of(attr, struct uncore_event_desc, attr); diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h index ad986c1e29bcc..f699783114ee3 100644 --- a/arch/x86/events/intel/uncore.h +++ b/arch/x86/events/intel/uncore.h @@ -124,7 +124,7 @@ struct intel_uncore_box { #define UNCORE_BOX_FLAG_CTL_OFFS8 1 /* event config registers are 8-byte apart */

struct uncore_event_desc { - struct kobj_attribute attr; + struct device_attribute attr; const char *config; };

@@ -136,8 +136,8 @@ struct pci2phy_map {

struct pci2phy_map *__find_pci2phy_map(int segment);

-ssize_t uncore_event_show(struct kobject *kobj, - struct kobj_attribute *attr, char *buf); +ssize_t uncore_event_show(struct device *dev, + struct device_attribute *attr, char *buf);

#define INTEL_UNCORE_EVENT_DESC(_name, _config) \ { \ @@ -146,14 +146,14 @@ ssize_t uncore_event_show(struct kobject *kobj, }

#define DEFINE_UNCORE_FORMAT_ATTR(_var, _name, _format) \ -static ssize_t __uncore_##_var##_show(struct kobject *kobj, \ - struct kobj_attribute *attr, \ +static ssize_t __uncore_##_var##_show(struct device *dev, \ + struct device_attribute *attr, \ char *page) \ { \ BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ return sprintf(page, _format "\n"); \ } \ -static struct kobj_attribute format_attr_##_var = \ +static struct device_attribute format_attr_##_var = \ __ATTR(_name, 0444, __uncore_##_var##_show, NULL)

static inline unsigned uncore_pci_box_ctl(struct intel_uncore_box *box)