From: Sibi Sankar sibis@codeaurora.org

commit 135b9e8d1cd8ba5ac9ad9bcf24b464b7b052e5b8 upstream

The following mem abort is observed when one of the modem blob firmware size exceeds the allocated mpss region. Fix this by restricting the copy size to segment size using request_firmware_into_buf before load.

Err Logs: Unable to handle kernel paging request at virtual address Mem abort info: ... Call trace: __memcpy+0x110/0x180 rproc_start+0xd0/0x190 rproc_boot+0x404/0x550 state_store+0x54/0xf8 dev_attr_store+0x44/0x60 sysfs_kf_write+0x58/0x80 kernfs_fop_write+0x140/0x230 vfs_write+0xc4/0x208 ksys_write+0x74/0xf8 ...

Reviewed-by: Bjorn Andersson bjorn.andersson@linaro.org Fixes: 051fb70fd4ea4 ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5") Cc: stable@vger.kernel.org Signed-off-by: Sibi Sankar sibis@codeaurora.org Link: https://lore.kernel.org/r/20200722201047.12975-3-sibis@codeaurora.org Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org [sudip: manual backport to old file path] Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/remoteproc/qcom_q6v5_pil.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/remoteproc/qcom_q6v5_pil.c +++ b/drivers/remoteproc/qcom_q6v5_pil.c @@ -560,14 +560,13 @@ static int q6v5_mpss_load(struct q6v5 *q

if (phdr->p_filesz) { snprintf(seg_name, sizeof(seg_name), "modem.b%02d", i); - ret = request_firmware(&seg_fw, seg_name, qproc->dev); + ret = request_firmware_into_buf(&seg_fw, seg_name, qproc->dev, + ptr, phdr->p_filesz); if (ret) { dev_err(qproc->dev, "failed to load %s\n", seg_name); goto release_firmware; }

- memcpy(ptr, seg_fw->data, seg_fw->size); - release_firmware(seg_fw); }

From: Cong Wang cong.wang@bytedance.com

[ Upstream commit afbc293add6466f8f3f0c3d944d85f53709c170f ]

xfrm_probe_algs() probes kernel crypto modules and changes the availability of struct xfrm_algo_desc. But there is a small window where ealg->available and aalg->available get changed between count_ah_combs()/count_esp_combs() and dump_ah_combs()/dump_esp_combs(), in this case we may allocate a smaller skb but later put a larger amount of data and trigger the panic in skb_put().

Fix this by relaxing the checks when counting the size, that is, skipping the test of ->available. We may waste some memory for a few of sizeof(struct sadb_comb), but it is still much better than a panic.

Reported-by: syzbot+b2bf2652983d23734c5c@syzkaller.appspotmail.com Cc: Steffen Klassert steffen.klassert@secunet.com Cc: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Cong Wang cong.wang@bytedance.com Signed-off-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/key/af_key.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/key/af_key.c b/net/key/af_key.c index 0747747fffe58..a10336cd7f974 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -2906,7 +2906,7 @@ static int count_ah_combs(const struct xfrm_tmpl *t) break; if (!aalg->pfkey_supported) continue; - if (aalg_tmpl_set(t, aalg) && aalg->available) + if (aalg_tmpl_set(t, aalg)) sz += sizeof(struct sadb_comb); } return sz + sizeof(struct sadb_prop); @@ -2924,7 +2924,7 @@ static int count_esp_combs(const struct xfrm_tmpl *t) if (!ealg->pfkey_supported) continue;

- if (!(ealg_tmpl_set(t, ealg) && ealg->available)) + if (!(ealg_tmpl_set(t, ealg))) continue;

for (k = 1; ; k++) { @@ -2935,7 +2935,7 @@ static int count_esp_combs(const struct xfrm_tmpl *t) if (!aalg->pfkey_supported) continue;

- if (aalg_tmpl_set(t, aalg) && aalg->available) + if (aalg_tmpl_set(t, aalg)) sz += sizeof(struct sadb_comb); } }

From: Johannes Berg johannes.berg@intel.com

[ Upstream commit 5c56d862c749669d45c256f581eac4244be00d4d ]

We need to take the mutex to call iwl_mvm_get_sync_time(), do it.

Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Luca Coelho luciano.coelho@intel.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/iwlwifi.20210115130252.4bb5ccf881a6.I62973cbb081e8... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c index 71a01df96f8b0..6db51abb8f4a3 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c @@ -518,7 +518,10 @@ static ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file, const size_t bufsz = sizeof(buf); int pos = 0;

+ mutex_lock(&mvm->mutex); iwl_mvm_get_sync_time(mvm, &curr_gp2, &curr_os); + mutex_unlock(&mvm->mutex); + do_div(curr_os, NSEC_PER_USEC); diff = curr_os - curr_gp2; pos += scnprintf(buf + pos, bufsz - pos, "diff=%lld\n", diff);

From: Johannes Berg johannes.berg@intel.com

[ Upstream commit 7a21b1d4a728a483f07c638ccd8610d4b4f12684 ]

If we get into a problem severe enough to attempt a reprobe, we schedule a worker to do that. However, if the problem gets more severe and the device is actually destroyed before this worker has a chance to run, we use a free device. Bump up the reference count of the device until the worker runs to avoid this situation.

Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Luca Coelho luciano.coelho@intel.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/iwlwifi.20210122144849.871f0892e4b2.I94819e11afd68... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index 54f411b83beae..dc0bc57767390 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -1169,6 +1169,7 @@ static void iwl_mvm_reprobe_wk(struct work_struct *wk) reprobe = container_of(wk, struct iwl_mvm_reprobe, work); if (device_reprobe(reprobe->dev)) dev_err(reprobe->dev, "reprobe failed!\n"); + put_device(reprobe->dev); kfree(reprobe); module_put(THIS_MODULE); } @@ -1219,7 +1220,7 @@ void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error) module_put(THIS_MODULE); return; } - reprobe->dev = mvm->trans->dev; + reprobe->dev = get_device(mvm->trans->dev); INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk); schedule_work(&reprobe->work); } else if (mvm->fwrt.cur_fw_img == IWL_UCODE_REGULAR &&

From: Dave Wysochanski dwysocha@redhat.com

[ Upstream commit e4a7d1f7707eb44fd953a31dd59eff82009d879c ]

When handling an auth_gss downcall, it's possible to get 0-length opaque object for the acceptor. In the case of a 0-length XDR object, make sure simple_get_netobj() fills in dest->data = NULL, and does not continue to kmemdup() which will set dest->data = ZERO_SIZE_PTR for the acceptor.

The trace event code can handle NULL but not ZERO_SIZE_PTR for a string, and so without this patch the rpcgss_context trace event will crash the kernel as follows:

[ 162.887992] BUG: kernel NULL pointer dereference, address: 0000000000000010 [ 162.898693] #PF: supervisor read access in kernel mode [ 162.900830] #PF: error_code(0x0000) - not-present page [ 162.902940] PGD 0 P4D 0 [ 162.904027] Oops: 0000 [#1] SMP PTI [ 162.905493] CPU: 4 PID: 4321 Comm: rpc.gssd Kdump: loaded Not tainted 5.10.0 #133 [ 162.908548] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [ 162.910978] RIP: 0010:strlen+0x0/0x20 [ 162.912505] Code: 48 89 f9 74 09 48 83 c1 01 80 39 00 75 f7 31 d2 44 0f b6 04 16 44 88 04 11 48 83 c2 01 45 84 c0 75 ee c3 0f 1f 80 00 00 00 00 <80> 3f 00 74 10 48 89 f8 48 83 c0 01 80 38 00 75 f7 48 29 f8 c3 31 [ 162.920101] RSP: 0018:ffffaec900c77d90 EFLAGS: 00010202 [ 162.922263] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000fffde697 [ 162.925158] RDX: 000000000000002f RSI: 0000000000000080 RDI: 0000000000000010 [ 162.928073] RBP: 0000000000000010 R08: 0000000000000e10 R09: 0000000000000000 [ 162.930976] R10: ffff8e698a590cb8 R11: 0000000000000001 R12: 0000000000000e10 [ 162.933883] R13: 00000000fffde697 R14: 000000010034d517 R15: 0000000000070028 [ 162.936777] FS: 00007f1e1eb93700(0000) GS:ffff8e6ab7d00000(0000) knlGS:0000000000000000 [ 162.940067] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 162.942417] CR2: 0000000000000010 CR3: 0000000104eba000 CR4: 00000000000406e0 [ 162.945300] Call Trace: [ 162.946428] trace_event_raw_event_rpcgss_context+0x84/0x140 [auth_rpcgss] [ 162.949308] ? __kmalloc_track_caller+0x35/0x5a0 [ 162.951224] ? gss_pipe_downcall+0x3a3/0x6a0 [auth_rpcgss] [ 162.953484] gss_pipe_downcall+0x585/0x6a0 [auth_rpcgss] [ 162.955953] rpc_pipe_write+0x58/0x70 [sunrpc] [ 162.957849] vfs_write+0xcb/0x2c0 [ 162.959264] ksys_write+0x68/0xe0 [ 162.960706] do_syscall_64+0x33/0x40 [ 162.962238] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 162.964346] RIP: 0033:0x7f1e1f1e57df

Signed-off-by: Dave Wysochanski dwysocha@redhat.com Signed-off-by: Trond Myklebust trond.myklebust@hammerspace.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/sunrpc/auth_gss/auth_gss_internal.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/net/sunrpc/auth_gss/auth_gss_internal.h b/net/sunrpc/auth_gss/auth_gss_internal.h index c5603242b54bf..f6d9631bd9d00 100644 --- a/net/sunrpc/auth_gss/auth_gss_internal.h +++ b/net/sunrpc/auth_gss/auth_gss_internal.h @@ -34,9 +34,12 @@ simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) q = (const void *)((const char *)p + len); if (unlikely(q > end || q < p)) return ERR_PTR(-EFAULT); - dest->data = kmemdup(p, len, GFP_NOFS); - if (unlikely(dest->data == NULL)) - return ERR_PTR(-ENOMEM); + if (len) { + dest->data = kmemdup(p, len, GFP_NOFS); + if (unlikely(dest->data == NULL)) + return ERR_PTR(-ENOMEM); + } else + dest->data = NULL; dest->len = len; return q; }

From: Qian Cai cai@lca.pw

[ Upstream commit d1a445d3b86c9341ce7a0954c23be0edb5c9bec5 ]

There are many of those warnings.

In file included from ./arch/powerpc/include/asm/paca.h:15, from ./arch/powerpc/include/asm/current.h:13, from ./include/linux/thread_info.h:21, from ./include/asm-generic/preempt.h:5, from ./arch/powerpc/include/generated/asm/preempt.h:1, from ./include/linux/preempt.h:78, from ./include/linux/spinlock.h:51, from fs/fs-writeback.c:19: In function 'strncpy', inlined from 'perf_trace_writeback_page_template' at ./include/trace/events/writeback.h:56:1: ./include/linux/string.h:260:9: warning: '__builtin_strncpy' specified bound 32 equals destination size [-Wstringop-truncation] return __builtin_strncpy(p, q, size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fix it by using the new strscpy_pad() which was introduced in "lib/string: Add strscpy_pad() function" and will always be NUL-terminated instead of strncpy(). Also, change strlcpy() to use strscpy_pad() in this file for consistency.

Link: http://lkml.kernel.org/r/1564075099-27750-1-git-send-email-cai@lca.pw Fixes: 455b2864686d ("writeback: Initial tracing support") Fixes: 028c2dd184c0 ("writeback: Add tracing to balance_dirty_pages") Fixes: e84d0a4f8e39 ("writeback: trace event writeback_queue_io") Fixes: b48c104d2211 ("writeback: trace event bdi_dirty_ratelimit") Fixes: cc1676d917f3 ("writeback: Move requeueing when I_SYNC set to writeback_sb_inodes()") Fixes: 9fb0a7da0c52 ("writeback: add more tracepoints") Signed-off-by: Qian Cai cai@lca.pw Reviewed-by: Jan Kara jack@suse.cz Cc: Tobin C. Harding tobin@kernel.org Cc: Steven Rostedt (VMware) rostedt@goodmis.org Cc: Ingo Molnar mingo@redhat.com Cc: Tejun Heo tj@kernel.org Cc: Dave Chinner dchinner@redhat.com Cc: Fengguang Wu fengguang.wu@intel.com Cc: Jens Axboe axboe@kernel.dk Cc: Joe Perches joe@perches.com Cc: Kees Cook keescook@chromium.org Cc: Jann Horn jannh@google.com Cc: Jonathan Corbet corbet@lwn.net Cc: Nitin Gote nitin.r.gote@intel.com Cc: Rasmus Villemoes rasmus.villemoes@prevas.dk Cc: Stephen Kitt steve@sk2.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/trace/events/writeback.h | 38 +++++++++++++++++--------------- 1 file changed, 20 insertions(+), 18 deletions(-)

diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 627f5759b67d1..a8066afb4b0ef 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -65,8 +65,9 @@ TRACE_EVENT(writeback_dirty_page, ),

TP_fast_assign( - strncpy(__entry->name, - mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", 32); + strscpy_pad(__entry->name, + mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", + 32); __entry->ino = mapping ? mapping->host->i_ino : 0; __entry->index = page->index; ), @@ -95,8 +96,8 @@ DECLARE_EVENT_CLASS(writeback_dirty_inode_template, struct backing_dev_info *bdi = inode_to_bdi(inode);

/* may be called for files on pseudo FSes w/ unregistered bdi */ - strncpy(__entry->name, - bdi->dev ? dev_name(bdi->dev) : "(unknown)", 32); + strscpy_pad(__entry->name, + bdi->dev ? dev_name(bdi->dev) : "(unknown)", 32); __entry->ino = inode->i_ino; __entry->state = inode->i_state; __entry->flags = flags; @@ -175,8 +176,8 @@ DECLARE_EVENT_CLASS(writeback_write_inode_template, ),

TP_fast_assign( - strncpy(__entry->name, - dev_name(inode_to_bdi(inode)->dev), 32); + strscpy_pad(__entry->name, + dev_name(inode_to_bdi(inode)->dev), 32); __entry->ino = inode->i_ino; __entry->sync_mode = wbc->sync_mode; __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc); @@ -219,8 +220,9 @@ DECLARE_EVENT_CLASS(writeback_work_class, __field(unsigned int, cgroup_ino) ), TP_fast_assign( - strncpy(__entry->name, - wb->bdi->dev ? dev_name(wb->bdi->dev) : "(unknown)", 32); + strscpy_pad(__entry->name, + wb->bdi->dev ? dev_name(wb->bdi->dev) : + "(unknown)", 32); __entry->nr_pages = work->nr_pages; __entry->sb_dev = work->sb ? work->sb->s_dev : 0; __entry->sync_mode = work->sync_mode; @@ -273,7 +275,7 @@ DECLARE_EVENT_CLASS(writeback_class, __field(unsigned int, cgroup_ino) ), TP_fast_assign( - strncpy(__entry->name, dev_name(wb->bdi->dev), 32); + strscpy_pad(__entry->name, dev_name(wb->bdi->dev), 32); __entry->cgroup_ino = __trace_wb_assign_cgroup(wb); ), TP_printk("bdi %s: cgroup_ino=%u", @@ -296,7 +298,7 @@ TRACE_EVENT(writeback_bdi_register, __array(char, name, 32) ), TP_fast_assign( - strncpy(__entry->name, dev_name(bdi->dev), 32); + strscpy_pad(__entry->name, dev_name(bdi->dev), 32); ), TP_printk("bdi %s", __entry->name @@ -321,7 +323,7 @@ DECLARE_EVENT_CLASS(wbc_class, ),

TP_fast_assign( - strncpy(__entry->name, dev_name(bdi->dev), 32); + strscpy_pad(__entry->name, dev_name(bdi->dev), 32); __entry->nr_to_write = wbc->nr_to_write; __entry->pages_skipped = wbc->pages_skipped; __entry->sync_mode = wbc->sync_mode; @@ -372,7 +374,7 @@ TRACE_EVENT(writeback_queue_io, __field(unsigned int, cgroup_ino) ), TP_fast_assign( - strncpy(__entry->name, dev_name(wb->bdi->dev), 32); + strncpy_pad(__entry->name, dev_name(wb->bdi->dev), 32); __entry->older = dirtied_before; __entry->age = (jiffies - dirtied_before) * 1000 / HZ; __entry->moved = moved; @@ -457,7 +459,7 @@ TRACE_EVENT(bdi_dirty_ratelimit, ),

TP_fast_assign( - strlcpy(__entry->bdi, dev_name(wb->bdi->dev), 32); + strscpy_pad(__entry->bdi, dev_name(wb->bdi->dev), 32); __entry->write_bw = KBps(wb->write_bandwidth); __entry->avg_write_bw = KBps(wb->avg_write_bandwidth); __entry->dirty_rate = KBps(dirty_rate); @@ -522,7 +524,7 @@ TRACE_EVENT(balance_dirty_pages,

TP_fast_assign( unsigned long freerun = (thresh + bg_thresh) / 2; - strlcpy(__entry->bdi, dev_name(wb->bdi->dev), 32); + strscpy_pad(__entry->bdi, dev_name(wb->bdi->dev), 32);

__entry->limit = global_wb_domain.dirty_limit; __entry->setpoint = (global_wb_domain.dirty_limit + @@ -582,8 +584,8 @@ TRACE_EVENT(writeback_sb_inodes_requeue, ),

TP_fast_assign( - strncpy(__entry->name, - dev_name(inode_to_bdi(inode)->dev), 32); + strscpy_pad(__entry->name, + dev_name(inode_to_bdi(inode)->dev), 32); __entry->ino = inode->i_ino; __entry->state = inode->i_state; __entry->dirtied_when = inode->dirtied_when; @@ -656,8 +658,8 @@ DECLARE_EVENT_CLASS(writeback_single_inode_template, ),

TP_fast_assign( - strncpy(__entry->name, - dev_name(inode_to_bdi(inode)->dev), 32); + strscpy_pad(__entry->name, + dev_name(inode_to_bdi(inode)->dev), 32); __entry->ino = inode->i_ino; __entry->state = inode->i_state; __entry->dirtied_when = inode->dirtied_when;

From: Phillip Lougher phillip@squashfs.org.uk

commit f37aa4c7366e23f91b81d00bafd6a7ab54e4a381 upstream.

Sysbot has reported a number of "slab-out-of-bounds reads" and "use-after-free read" errors which has been identified as being caused by a corrupted index value read from the inode. This could be because the metadata block is uncompressed, or because the "compression" bit has been corrupted (turning a compressed block into an uncompressed block).

This patch adds additional sanity checks to detect this, and the following corruption.

1. It checks against corruption of the ids count. This can either lead to a larger table to be read, or a smaller than expected table to be read.

In the case of a too large ids count, this would often have been trapped by the existing sanity checks, but this patch introduces a more exact check, which can identify too small values.

2. It checks the contents of the index table for corruption.

Link: https://lkml.kernel.org/r/20210204130249.4495-3-phillip@squashfs.org.uk Signed-off-by: Phillip Lougher phillip@squashfs.org.uk Reported-by: syzbot+b06d57ba83f604522af2@syzkaller.appspotmail.com Reported-by: syzbot+c021ba012da41ee9807c@syzkaller.appspotmail.com Reported-by: syzbot+5024636e8b5fd19f0f19@syzkaller.appspotmail.com Reported-by: syzbot+bcbc661df46657d0fa4f@syzkaller.appspotmail.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 --- fs/squashfs/id.c | 40 ++++++++++++++++++++++++++++++++-------- fs/squashfs/squashfs_fs_sb.h | 1 + fs/squashfs/super.c | 6 +++--- fs/squashfs/xattr.h | 10 +++++++++- 4 files changed, 45 insertions(+), 12 deletions(-)

--- a/fs/squashfs/id.c +++ b/fs/squashfs/id.c @@ -48,10 +48,15 @@ int squashfs_get_id(struct super_block * struct squashfs_sb_info *msblk = sb->s_fs_info; int block = SQUASHFS_ID_BLOCK(index); int offset = SQUASHFS_ID_BLOCK_OFFSET(index); - u64 start_block = le64_to_cpu(msblk->id_table[block]); + u64 start_block; __le32 disk_id; int err;

+ if (index >= msblk->ids) + return -EINVAL; + + start_block = le64_to_cpu(msblk->id_table[block]); + err = squashfs_read_metadata(sb, &disk_id, &start_block, &offset, sizeof(disk_id)); if (err < 0) @@ -69,7 +74,10 @@ __le64 *squashfs_read_id_index_table(str u64 id_table_start, u64 next_table, unsigned short no_ids) { unsigned int length = SQUASHFS_ID_BLOCK_BYTES(no_ids); + unsigned int indexes = SQUASHFS_ID_BLOCKS(no_ids); + int n; __le64 *table; + u64 start, end;

TRACE("In read_id_index_table, length %d\n", length);

@@ -80,20 +88,36 @@ __le64 *squashfs_read_id_index_table(str return ERR_PTR(-EINVAL);

/* - * length bytes should not extend into the next table - this check - * also traps instances where id_table_start is incorrectly larger - * than the next table start + * The computed size of the index table (length bytes) should exactly + * match the table start and end points */ - if (id_table_start + length > next_table) + if (length != (next_table - id_table_start)) return ERR_PTR(-EINVAL);

table = squashfs_read_table(sb, id_table_start, length); + if (IS_ERR(table)) + return table;

/* - * table[0] points to the first id lookup table metadata block, this - * should be less than id_table_start + * table[0], table[1], ... table[indexes - 1] store the locations + * of the compressed id blocks. Each entry should be less than + * the next (i.e. table[0] < table[1]), and the difference between them + * should be SQUASHFS_METADATA_SIZE or less. table[indexes - 1] + * should be less than id_table_start, and again the difference + * should be SQUASHFS_METADATA_SIZE or less */ - if (!IS_ERR(table) && le64_to_cpu(table[0]) >= id_table_start) { + for (n = 0; n < (indexes - 1); n++) { + start = le64_to_cpu(table[n]); + end = le64_to_cpu(table[n + 1]); + + if (start >= end || (end - start) > SQUASHFS_METADATA_SIZE) { + kfree(table); + return ERR_PTR(-EINVAL); + } + } + + start = le64_to_cpu(table[indexes - 1]); + if (start >= id_table_start || (id_table_start - start) > SQUASHFS_METADATA_SIZE) { kfree(table); return ERR_PTR(-EINVAL); } --- a/fs/squashfs/squashfs_fs_sb.h +++ b/fs/squashfs/squashfs_fs_sb.h @@ -77,5 +77,6 @@ struct squashfs_sb_info { unsigned int inodes; unsigned int fragments; int xattr_ids; + unsigned int ids; }; #endif --- a/fs/squashfs/super.c +++ b/fs/squashfs/super.c @@ -176,6 +176,7 @@ static int squashfs_fill_super(struct su msblk->directory_table = le64_to_cpu(sblk->directory_table_start); msblk->inodes = le32_to_cpu(sblk->inodes); msblk->fragments = le32_to_cpu(sblk->fragments); + msblk->ids = le16_to_cpu(sblk->no_ids); flags = le16_to_cpu(sblk->flags);

TRACE("Found valid superblock on %pg\n", sb->s_bdev); @@ -187,7 +188,7 @@ static int squashfs_fill_super(struct su TRACE("Block size %d\n", msblk->block_size); TRACE("Number of inodes %d\n", msblk->inodes); TRACE("Number of fragments %d\n", msblk->fragments); - TRACE("Number of ids %d\n", le16_to_cpu(sblk->no_ids)); + TRACE("Number of ids %d\n", msblk->ids); TRACE("sblk->inode_table_start %llx\n", msblk->inode_table); TRACE("sblk->directory_table_start %llx\n", msblk->directory_table); TRACE("sblk->fragment_table_start %llx\n", @@ -244,8 +245,7 @@ static int squashfs_fill_super(struct su allocate_id_index_table: /* Allocate and read id index table */ msblk->id_table = squashfs_read_id_index_table(sb, - le64_to_cpu(sblk->id_table_start), next_table, - le16_to_cpu(sblk->no_ids)); + le64_to_cpu(sblk->id_table_start), next_table, msblk->ids); if (IS_ERR(msblk->id_table)) { ERROR("unable to read id index table\n"); err = PTR_ERR(msblk->id_table); --- a/fs/squashfs/xattr.h +++ b/fs/squashfs/xattr.h @@ -30,8 +30,16 @@ extern int squashfs_xattr_lookup(struct static inline __le64 *squashfs_read_xattr_id_table(struct super_block *sb, u64 start, u64 *xattr_table_start, int *xattr_ids) { + struct squashfs_xattr_id_table *id_table; + + id_table = squashfs_read_table(sb, start, sizeof(*id_table)); + if (IS_ERR(id_table)) + return (__le64 *) id_table; + + *xattr_table_start = le64_to_cpu(id_table->xattr_table_start); + kfree(id_table); + ERROR("Xattrs in filesystem, these will be ignored\n"); - *xattr_table_start = start; return ERR_PTR(-ENOTSUPP); }

From: Phillip Lougher phillip@squashfs.org.uk

commit 506220d2ba21791314af569211ffd8870b8208fa upstream.

Sysbot has reported a warning where a kmalloc() attempt exceeds the maximum limit. This has been identified as corruption of the xattr_ids count when reading the xattr id lookup table.

This patch adds a number of additional sanity checks to detect this corruption and others.

1. It checks for a corrupted xattr index read from the inode. This could be because the metadata block is uncompressed, or because the "compression" bit has been corrupted (turning a compressed block into an uncompressed block). This would cause an out of bounds read.

2. It checks against corruption of the xattr_ids count. This can either lead to the above kmalloc failure, or a smaller than expected table to be read.

3. It checks the contents of the index table for corruption.

[phillip@squashfs.org.uk: fix checkpatch issue] Link: https://lkml.kernel.org/r/270245655.754655.1612770082682@webmail.123-reg.co....

Link: https://lkml.kernel.org/r/20210204130249.4495-5-phillip@squashfs.org.uk Signed-off-by: Phillip Lougher phillip@squashfs.org.uk Reported-by: syzbot+2ccea6339d368360800d@syzkaller.appspotmail.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 --- fs/squashfs/xattr_id.c | 66 ++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 57 insertions(+), 9 deletions(-)

--- a/fs/squashfs/xattr_id.c +++ b/fs/squashfs/xattr_id.c @@ -44,10 +44,15 @@ int squashfs_xattr_lookup(struct super_b struct squashfs_sb_info *msblk = sb->s_fs_info; int block = SQUASHFS_XATTR_BLOCK(index); int offset = SQUASHFS_XATTR_BLOCK_OFFSET(index); - u64 start_block = le64_to_cpu(msblk->xattr_id_table[block]); + u64 start_block; struct squashfs_xattr_id id; int err;

+ if (index >= msblk->xattr_ids) + return -EINVAL; + + start_block = le64_to_cpu(msblk->xattr_id_table[block]); + err = squashfs_read_metadata(sb, &id, &start_block, &offset, sizeof(id)); if (err < 0) @@ -63,13 +68,17 @@ int squashfs_xattr_lookup(struct super_b /* * Read uncompressed xattr id lookup table indexes from disk into memory */ -__le64 *squashfs_read_xattr_id_table(struct super_block *sb, u64 start, +__le64 *squashfs_read_xattr_id_table(struct super_block *sb, u64 table_start, u64 *xattr_table_start, int *xattr_ids) { - unsigned int len; + struct squashfs_sb_info *msblk = sb->s_fs_info; + unsigned int len, indexes; struct squashfs_xattr_id_table *id_table; + __le64 *table; + u64 start, end; + int n;

- id_table = squashfs_read_table(sb, start, sizeof(*id_table)); + id_table = squashfs_read_table(sb, table_start, sizeof(*id_table)); if (IS_ERR(id_table)) return (__le64 *) id_table;

@@ -83,13 +92,52 @@ __le64 *squashfs_read_xattr_id_table(str if (*xattr_ids == 0) return ERR_PTR(-EINVAL);

- /* xattr_table should be less than start */ - if (*xattr_table_start >= start) + len = SQUASHFS_XATTR_BLOCK_BYTES(*xattr_ids); + indexes = SQUASHFS_XATTR_BLOCKS(*xattr_ids); + + /* + * The computed size of the index table (len bytes) should exactly + * match the table start and end points + */ + start = table_start + sizeof(*id_table); + end = msblk->bytes_used; + + if (len != (end - start)) return ERR_PTR(-EINVAL);

- len = SQUASHFS_XATTR_BLOCK_BYTES(*xattr_ids); + table = squashfs_read_table(sb, start, len); + if (IS_ERR(table)) + return table; + + /* table[0], table[1], ... table[indexes - 1] store the locations + * of the compressed xattr id blocks. Each entry should be less than + * the next (i.e. table[0] < table[1]), and the difference between them + * should be SQUASHFS_METADATA_SIZE or less. table[indexes - 1] + * should be less than table_start, and again the difference + * shouls be SQUASHFS_METADATA_SIZE or less. + * + * Finally xattr_table_start should be less than table[0]. + */ + for (n = 0; n < (indexes - 1); n++) { + start = le64_to_cpu(table[n]); + end = le64_to_cpu(table[n + 1]); + + if (start >= end || (end - start) > SQUASHFS_METADATA_SIZE) { + kfree(table); + return ERR_PTR(-EINVAL); + } + } + + start = le64_to_cpu(table[indexes - 1]); + if (start >= table_start || (table_start - start) > SQUASHFS_METADATA_SIZE) { + kfree(table); + return ERR_PTR(-EINVAL); + }

- TRACE("In read_xattr_index_table, length %d\n", len); + if (*xattr_table_start >= le64_to_cpu(table[0])) { + kfree(table); + return ERR_PTR(-EINVAL); + }

- return squashfs_read_table(sb, start + sizeof(*id_table), len); + return table; }

From: Steven Rostedt (VMware) rostedt@goodmis.org

commit b220c049d5196dd94d992dd2dc8cba1a5e6123bf upstream.

When filters are used by trace events, a page is allocated on each CPU and used to copy the trace event fields to this page before writing to the ring buffer. The reason to use the filter and not write directly into the ring buffer is because a filter may discard the event and there's more overhead on discarding from the ring buffer than the extra copy.

The problem here is that there is no check against the size being allocated when using this page. If an event asks for more than a page size while being filtered, it will get only a page, leading to the caller writing more that what was allocated.

Check the length of the request, and if it is more than PAGE_SIZE minus the header default back to allocating from the ring buffer directly. The ring buffer may reject the event if its too big anyway, but it wont overflow.

Link: https://lore.kernel.org/ath10k/1612839593-2308-1-git-send-email-wgong@codeau...

Cc: stable@vger.kernel.org Fixes: 0fc1b09ff1ff4 ("tracing: Use temp buffer when filtering events") Reported-by: Wen Gong wgong@codeaurora.org Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/trace/trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2285,7 +2285,7 @@ trace_event_buffer_lock_reserve(struct r (entry = this_cpu_read(trace_buffered_event))) { /* Try to use the per cpu buffer first */ val = this_cpu_inc_return(trace_buffered_event_cnt); - if (val == 1) { + if ((len < (PAGE_SIZE - sizeof(*entry))) && val == 1) { trace_event_setup(entry, type, flags, pc); entry->array[0] = len; return entry;

From: Jaedon Shin jaedon.shin@gmail.com

commit 627f4a2bdf113ab88abc65cb505c89cbf615eae0 upstream.

Remove the __init annotation from bmips_cpu_setup() to avoid the following warning.

WARNING: vmlinux.o(.text+0x35c950): Section mismatch in reference from the function brcmstb_pm_s3() to the function .init.text:bmips_cpu_setup() The function brcmstb_pm_s3() references the function __init bmips_cpu_setup(). This is often because brcmstb_pm_s3 lacks a __init annotation or the annotation of bmips_cpu_setup is wrong.

Signed-off-by: Jaedon Shin jaedon.shin@gmail.com Cc: Ralf Baechle ralf@linux-mips.org Cc: Florian Fainelli f.fainelli@gmail.com Cc: Kevin Cernekee cernekee@gmail.com Cc: linux-mips@linux-mips.org Reviewed-by: James Hogan jhogan@kernel.org Reviewed-by: Florian Fainelli f.fainelli@gmail.com Patchwork: https://patchwork.linux-mips.org/patch/18589/ Signed-off-by: James Hogan jhogan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/mips/kernel/smp-bmips.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/mips/kernel/smp-bmips.c +++ b/arch/mips/kernel/smp-bmips.c @@ -574,7 +574,7 @@ asmlinkage void __weak plat_wired_tlb_se */ }

-void __init bmips_cpu_setup(void) +void bmips_cpu_setup(void) { void __iomem __maybe_unused *cbr = BMIPS_GET_CBR(); u32 __maybe_unused cfg;

From: Hans de Goede hdegoede@redhat.com

[ Upstream commit 67fbe02a5cebc3c653610f12e3c0424e58450153 ]

Recently userspace has started making more use of SW_TABLET_MODE (when an input-dev reports this).

Specifically recent GNOME3 versions will:

1. When SW_TABLET_MODE is reported and is reporting 0: 1.1 Disable accelerometer-based screen auto-rotation 1.2 Disable automatically showing the on-screen keyboard when a text-input field is focussed

2. When SW_TABLET_MODE is reported and is reporting 1: 2.1 Ignore input-events from the builtin keyboard and touchpad (this is for 360° hinges style 2-in-1s where the keyboard and touchpads are accessible on the back of the tablet when folded into tablet-mode)

This means that claiming to support SW_TABLET_MODE when it does not actually work / reports correct values has bad side-effects.

The check in the hp-wmi code which is used to decide if the input-dev should claim SW_TABLET_MODE support, only checks if the HPWMI_HARDWARE_QUERY is supported. It does *not* check if the hardware actually is capable of reporting SW_TABLET_MODE.

This leads to the hp-wmi input-dev claiming SW_TABLET_MODE support, while in reality it will always report 0 as SW_TABLET_MODE value. This has been seen on a "HP ENVY x360 Convertible 15-cp0xxx" and this likely is the case on a whole lot of other HP models.

This problem causes both auto-rotation and on-screen keyboard support to not work on affected x360 models.

There is no easy fix for this, but since userspace expects SW_TABLET_MODE reporting to be reliable when advertised it is better to not claim/report SW_TABLET_MODE support at all, then to claim to support it while it does not work.

To avoid the mentioned problems, add a new enable_tablet_mode_sw module-parameter which defaults to false.

Note I've made this an int using the standard -1=auto, 0=off, 1=on triplett, with the hope that in the future we can come up with a better way to detect SW_TABLET_MODE support. ATM the default auto option just does the same as off.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1918255 Cc: Stefan Brüns stefan.bruens@rwth-aachen.de Signed-off-by: Hans de Goede hdegoede@redhat.com Acked-by: Mark Gross mgross@linux.intel.com Link: https://lore.kernel.org/r/20210120124941.73409-1-hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/hp-wmi.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c index 952544ca0d84d..93fadd4abf14d 100644 --- a/drivers/platform/x86/hp-wmi.c +++ b/drivers/platform/x86/hp-wmi.c @@ -45,6 +45,10 @@ MODULE_LICENSE("GPL"); MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C"); MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");

+static int enable_tablet_mode_sw = -1; +module_param(enable_tablet_mode_sw, int, 0444); +MODULE_PARM_DESC(enable_tablet_mode_sw, "Enable SW_TABLET_MODE reporting (-1=auto, 0=no, 1=yes)"); + #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C" #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"

@@ -656,10 +660,12 @@ static int __init hp_wmi_input_setup(void) }

/* Tablet mode */ - val = hp_wmi_hw_state(HPWMI_TABLET_MASK); - if (!(val < 0)) { - __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit); - input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val); + if (enable_tablet_mode_sw > 0) { + val = hp_wmi_hw_state(HPWMI_TABLET_MASK); + if (val >= 0) { + __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit); + input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val); + } }

err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);

From: Miklos Szeredi mszeredi@redhat.com

[ Upstream commit f2b00be488730522d0fb7a8a5de663febdcefe0a ]

If a capability is stored on disk in v2 format cap_inode_getsecurity() will currently return in v2 format unconditionally.

This is wrong: v2 cap should be equivalent to a v3 cap with zero rootid, and so the same conversions performed on it.

If the rootid cannot be mapped, v3 is returned unconverted. Fix this so that both v2 and v3 return -EOVERFLOW if the rootid (or the owner of the fs user namespace in case of v2) cannot be mapped into the current user namespace.

Signed-off-by: Miklos Szeredi mszeredi@redhat.com Acked-by: "Eric W. Biederman" ebiederm@xmission.com Signed-off-by: Sasha Levin sashal@kernel.org --- security/commoncap.c | 67 ++++++++++++++++++++++++++++---------------- 1 file changed, 43 insertions(+), 24 deletions(-)

diff --git a/security/commoncap.c b/security/commoncap.c index ac031fa391908..bf689d61b293c 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -378,10 +378,11 @@ int cap_inode_getsecurity(struct inode *inode, const char *name, void **buffer, { int size, ret; kuid_t kroot; + u32 nsmagic, magic; uid_t root, mappedroot; char *tmpbuf = NULL; struct vfs_cap_data *cap; - struct vfs_ns_cap_data *nscap; + struct vfs_ns_cap_data *nscap = NULL; struct dentry *dentry; struct user_namespace *fs_ns;

@@ -403,46 +404,61 @@ int cap_inode_getsecurity(struct inode *inode, const char *name, void **buffer, fs_ns = inode->i_sb->s_user_ns; cap = (struct vfs_cap_data *) tmpbuf; if (is_v2header((size_t) ret, cap)) { - /* If this is sizeof(vfs_cap_data) then we're ok with the - * on-disk value, so return that. */ - if (alloc) - *buffer = tmpbuf; - else - kfree(tmpbuf); - return ret; - } else if (!is_v3header((size_t) ret, cap)) { - kfree(tmpbuf); - return -EINVAL; + root = 0; + } else if (is_v3header((size_t) ret, cap)) { + nscap = (struct vfs_ns_cap_data *) tmpbuf; + root = le32_to_cpu(nscap->rootid); + } else { + size = -EINVAL; + goto out_free; }

- nscap = (struct vfs_ns_cap_data *) tmpbuf; - root = le32_to_cpu(nscap->rootid); kroot = make_kuid(fs_ns, root);

/* If the root kuid maps to a valid uid in current ns, then return * this as a nscap. */ mappedroot = from_kuid(current_user_ns(), kroot); if (mappedroot != (uid_t)-1 && mappedroot != (uid_t)0) { + size = sizeof(struct vfs_ns_cap_data); if (alloc) { - *buffer = tmpbuf; + if (!nscap) { + /* v2 -> v3 conversion */ + nscap = kzalloc(size, GFP_ATOMIC); + if (!nscap) { + size = -ENOMEM; + goto out_free; + } + nsmagic = VFS_CAP_REVISION_3; + magic = le32_to_cpu(cap->magic_etc); + if (magic & VFS_CAP_FLAGS_EFFECTIVE) + nsmagic |= VFS_CAP_FLAGS_EFFECTIVE; + memcpy(&nscap->data, &cap->data, sizeof(__le32) * 2 * VFS_CAP_U32); + nscap->magic_etc = cpu_to_le32(nsmagic); + } else { + /* use allocated v3 buffer */ + tmpbuf = NULL; + } nscap->rootid = cpu_to_le32(mappedroot); - } else - kfree(tmpbuf); - return size; + *buffer = nscap; + } + goto out_free; }

if (!rootid_owns_currentns(kroot)) { - kfree(tmpbuf); - return -EOPNOTSUPP; + size = -EOVERFLOW; + goto out_free; }

/* This comes from a parent namespace. Return as a v2 capability */ size = sizeof(struct vfs_cap_data); if (alloc) { - *buffer = kmalloc(size, GFP_ATOMIC); - if (*buffer) { - struct vfs_cap_data *cap = *buffer; - __le32 nsmagic, magic; + if (nscap) { + /* v3 -> v2 conversion */ + cap = kzalloc(size, GFP_ATOMIC); + if (!cap) { + size = -ENOMEM; + goto out_free; + } magic = VFS_CAP_REVISION_2; nsmagic = le32_to_cpu(nscap->magic_etc); if (nsmagic & VFS_CAP_FLAGS_EFFECTIVE) @@ -450,9 +466,12 @@ int cap_inode_getsecurity(struct inode *inode, const char *name, void **buffer, memcpy(&cap->data, &nscap->data, sizeof(__le32) * 2 * VFS_CAP_U32); cap->magic_etc = cpu_to_le32(magic); } else { - size = -ENOMEM; + /* use unconverted v2 */ + tmpbuf = NULL; } + *buffer = cap; } +out_free: kfree(tmpbuf); return size; }

From: Alexandre Belloni alexandre.belloni@bootlin.com

[ Upstream commit 5638159f6d93b99ec9743ac7f65563fca3cf413d ]

This reverts commit c17e9377aa81664d94b4f2102559fcf2a01ec8e7.

The lpc32xx clock driver is not able to actually change the PLL rate as this would require reparenting ARM_CLK, DDRAM_CLK, PERIPH_CLK to SYSCLK, then stop the PLL, update the register, restart the PLL and wait for the PLL to lock and finally reparent ARM_CLK, DDRAM_CLK, PERIPH_CLK to HCLK PLL.

Currently, the HCLK driver simply updates the registers but this has no real effect and all the clock rate calculation end up being wrong. This is especially annoying for the peripheral (e.g. UARTs, I2C, SPI).

Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Tested-by: Gregory CLEMENT gregory.clement@bootlin.com Link: https://lore.kernel.org/r/20210203090320.GA3760268@piout.net' Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/lpc32xx.dtsi | 3 --- 1 file changed, 3 deletions(-)

diff --git a/arch/arm/boot/dts/lpc32xx.dtsi b/arch/arm/boot/dts/lpc32xx.dtsi index c5b119ddb70b8..7f2b73cbd2280 100644 --- a/arch/arm/boot/dts/lpc32xx.dtsi +++ b/arch/arm/boot/dts/lpc32xx.dtsi @@ -323,9 +323,6 @@

clocks = <&xtal_32k>, <&xtal>; clock-names = "xtal_32k", "xtal"; - - assigned-clocks = <&clk LPC32XX_CLK_HCLK_PLL>; - assigned-clock-rates = <208000000>; }; };

From: Roman Gushchin guro@fb.com

[ Upstream commit 2dcb3964544177c51853a210b6ad400de78ef17d ]

With kaslr the kernel image is placed at a random place, so starting the bottom-up allocation with the kernel_end can result in an allocation failure and a warning like this one:

hugetlb_cma: reserve 2048 MiB, up to 2048 MiB per node ------------[ cut here ]------------ memblock: bottom-up allocation failed, memory hotremove may be affected WARNING: CPU: 0 PID: 0 at mm/memblock.c:332 memblock_find_in_range_node+0x178/0x25a Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.0+ #1169 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 RIP: 0010:memblock_find_in_range_node+0x178/0x25a Code: e9 6d ff ff ff 48 85 c0 0f 85 da 00 00 00 80 3d 9b 35 df 00 00 75 15 48 c7 c7 c0 75 59 88 c6 05 8b 35 df 00 01 e8 25 8a fa ff <0f> 0b 48 c7 44 24 20 ff ff ff ff 44 89 e6 44 89 ea 48 c7 c1 70 5c RSP: 0000:ffffffff88803d18 EFLAGS: 00010086 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000240000000 RCX: 00000000ffffdfff RDX: 00000000ffffdfff RSI: 00000000ffffffea RDI: 0000000000000046 RBP: 0000000100000000 R08: ffffffff88922788 R09: 0000000000009ffb R10: 00000000ffffe000 R11: 3fffffffffffffff R12: 0000000000000000 R13: 0000000000000000 R14: 0000000080000000 R15: 00000001fb42c000 FS: 0000000000000000(0000) GS:ffffffff88f71000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffa080fb401000 CR3: 00000001fa80a000 CR4: 00000000000406b0 Call Trace: memblock_alloc_range_nid+0x8d/0x11e cma_declare_contiguous_nid+0x2c4/0x38c hugetlb_cma_reserve+0xdc/0x128 flush_tlb_one_kernel+0xc/0x20 native_set_fixmap+0x82/0xd0 flat_get_apic_id+0x5/0x10 register_lapic_address+0x8e/0x97 setup_arch+0x8a5/0xc3f start_kernel+0x66/0x547 load_ucode_bsp+0x4c/0xcd secondary_startup_64_no_verify+0xb0/0xbb random: get_random_bytes called from __warn+0xab/0x110 with crng_init=0 ---[ end trace f151227d0b39be70 ]---

At the same time, the kernel image is protected with memblock_reserve(), so we can just start searching at PAGE_SIZE. In this case the bottom-up allocation has the same chances to success as a top-down allocation, so there is no reason to fallback in the case of a failure. All together it simplifies the logic.

Link: https://lkml.kernel.org/r/20201217201214.3414100-2-guro@fb.com Fixes: 8fabc623238e ("powerpc: Ensure that swiotlb buffer is allocated from low memory") Signed-off-by: Roman Gushchin guro@fb.com Reviewed-by: Mike Rapoport rppt@linux.ibm.com Cc: Joonsoo Kim iamjoonsoo.kim@lge.com Cc: Michal Hocko mhocko@kernel.org Cc: Rik van Riel riel@surriel.com Cc: Wonhyuk Yang vvghjk1234@gmail.com Cc: Thiago Jung Bauermann bauerman@linux.ibm.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- mm/memblock.c | 48 ++++++------------------------------------------ 1 file changed, 6 insertions(+), 42 deletions(-)

diff --git a/mm/memblock.c b/mm/memblock.c index e81d12c544e9f..5d36b4c549292 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -174,14 +174,6 @@ __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, * * Find @size free area aligned to @align in the specified range and node. * - * When allocation direction is bottom-up, the @start should be greater - * than the end of the kernel image. Otherwise, it will be trimmed. The - * reason is that we want the bottom-up allocation just near the kernel - * image so it is highly likely that the allocated memory and the kernel - * will reside in the same node. - * - * If bottom-up allocation failed, will try to allocate memory top-down. - * * RETURNS: * Found address on success, 0 on failure. */ @@ -189,8 +181,6 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, int nid, ulong flags) { - phys_addr_t kernel_end, ret; - /* pump up @end */ if (end == MEMBLOCK_ALLOC_ACCESSIBLE) end = memblock.current_limit; @@ -198,39 +188,13 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, /* avoid allocating the first page */ start = max_t(phys_addr_t, start, PAGE_SIZE); end = max(start, end); - kernel_end = __pa_symbol(_end); - - /* - * try bottom-up allocation only when bottom-up mode - * is set and @end is above the kernel image. - */ - if (memblock_bottom_up() && end > kernel_end) { - phys_addr_t bottom_up_start; - - /* make sure we will allocate above the kernel */ - bottom_up_start = max(start, kernel_end);

- /* ok, try bottom-up allocation first */ - ret = __memblock_find_range_bottom_up(bottom_up_start, end, - size, align, nid, flags); - if (ret) - return ret; - - /* - * we always limit bottom-up allocation above the kernel, - * but top-down allocation doesn't have the limit, so - * retrying top-down allocation may succeed when bottom-up - * allocation failed. - * - * bottom-up allocation is expected to be fail very rarely, - * so we use WARN_ONCE() here to see the stack trace if - * fail happens. - */ - WARN_ONCE(1, "memblock: bottom-up allocation failed, memory hotunplug may be affected\n"); - } - - return __memblock_find_range_top_down(start, end, size, align, nid, - flags); + if (memblock_bottom_up()) + return __memblock_find_range_bottom_up(start, end, size, align, + nid, flags); + else + return __memblock_find_range_top_down(start, end, size, align, + nid, flags); }

/**

From: Jozsef Kadlecsik kadlec@mail.kfki.hu

[ Upstream commit b1bdde33b72366da20d10770ab7a49fe87b5e190 ]

When both --reap and --update flag are specified, there's a code path at which the entry to be updated is reaped beforehand, which then leads to kernel crash. Reap only entries which won't be updated.

Fixes kernel bugzilla #207773.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=207773 Reported-by: Reindl Harald h.reindl@thelounge.net Fixes: 0079c5aee348 ("netfilter: xt_recent: add an entry reaper") Signed-off-by: Jozsef Kadlecsik kadlec@netfilter.org Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/xt_recent.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c index cf96d230e5a3c..cafbddf844d62 100644 --- a/net/netfilter/xt_recent.c +++ b/net/netfilter/xt_recent.c @@ -155,7 +155,8 @@ static void recent_entry_remove(struct recent_table *t, struct recent_entry *e) /* * Drop entries with timestamps older then 'time'. */ -static void recent_entry_reap(struct recent_table *t, unsigned long time) +static void recent_entry_reap(struct recent_table *t, unsigned long time, + struct recent_entry *working, bool update) { struct recent_entry *e;

@@ -164,6 +165,12 @@ static void recent_entry_reap(struct recent_table *t, unsigned long time) */ e = list_entry(t->lru_list.next, struct recent_entry, lru_list);

+ /* + * Do not reap the entry which are going to be updated. + */ + if (e == working && update) + return; + /* * The last time stamp is the most recent. */ @@ -306,7 +313,8 @@ recent_mt(const struct sk_buff *skb, struct xt_action_param *par)

/* info->seconds must be non-zero */ if (info->check_set & XT_RECENT_REAP) - recent_entry_reap(t, time); + recent_entry_reap(t, time, e, + info->check_set & XT_RECENT_UPDATE && ret); }

if (info->check_set & XT_RECENT_SET ||

From: Florian Westphal fw@strlen.de

[ Upstream commit 07998281c268592963e1cd623fe6ab0270b65ae4 ]

The origin skip check needs to re-test the zone. Else, we might skip a colliding tuple in the reply direction.

This only occurs when using 'directional zones' where origin tuples reside in different zones but the reply tuples share the same zone.

This causes the new conntrack entry to be dropped at confirmation time because NAT clash resolution was elided.

Fixes: 4e35c1cb9460240 ("netfilter: nf_nat: skip nat clash resolution for same-origin entries") Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nf_conntrack_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 8064d769c953c..ede0ab5dc400a 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -939,7 +939,8 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple, * Let nf_ct_resolve_clash() deal with this later. */ if (nf_ct_tuple_equal(&ignored_conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple, - &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple)) + &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple) && + nf_ct_zone_equal(ct, zone, IP_CT_DIR_ORIGINAL)) continue;

NF_CT_STAT_INC_ATOMIC(net, found);

From: Serge Semin Sergey.Semin@baikalelectronics.ru

commit fca3f138105727c3a22edda32d02f91ce1bf11c9 upstream

Originally the procedure of the ULPI transaction finish detection has been developed as a simple busy-loop with just decrementing counter and no delays. It's wrong since on different systems the loop will take a different time to complete. So if the system bus and CPU are fast enough to overtake the ULPI bus and the companion PHY reaction, then we'll get to take a false timeout error. Fix this by converting the busy-loop procedure to take the standard bus speed, address value and the registers access mode into account for the busy-loop delay calculation.

Here is the way the fix works. It's known that the ULPI bus is clocked with 60MHz signal. In accordance with [1] the ULPI bus protocol is created so to spend 5 and 6 clock periods for immediate register write and read operations respectively, and 6 and 7 clock periods - for the extended register writes and reads. Based on that we can easily pre-calculate the time which will be needed for the controller to perform a requested IO operation. Note we'll still preserve the attempts counter in case if the DWC USB3 controller has got some internals delays.

[1] UTMI+ Low Pin Interface (ULPI) Specification, Revision 1.1, October 20, 2004, pp. 30 - 36.

Fixes: 88bc9d194ff6 ("usb: dwc3: add ULPI interface support") Acked-by: Heikki Krogerus heikki.krogerus@linux.intel.com Signed-off-by: Serge Semin Sergey.Semin@baikalelectronics.ru Link: https://lore.kernel.org/r/20201210085008.13264-3-Sergey.Semin@baikalelectron... Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org [sudip: adjust context] Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc3/ulpi.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-)

--- a/drivers/usb/dwc3/ulpi.c +++ b/drivers/usb/dwc3/ulpi.c @@ -10,6 +10,8 @@ * published by the Free Software Foundation. */

+#include <linux/delay.h> +#include <linux/time64.h> #include <linux/ulpi/regs.h>

#include "core.h" @@ -20,12 +22,22 @@ DWC3_GUSB2PHYACC_ADDR(ULPI_ACCESS_EXTENDED) | \ DWC3_GUSB2PHYACC_EXTEND_ADDR(a) : DWC3_GUSB2PHYACC_ADDR(a))

-static int dwc3_ulpi_busyloop(struct dwc3 *dwc) +#define DWC3_ULPI_BASE_DELAY DIV_ROUND_UP(NSEC_PER_SEC, 60000000L) + +static int dwc3_ulpi_busyloop(struct dwc3 *dwc, u8 addr, bool read) { + unsigned long ns = 5L * DWC3_ULPI_BASE_DELAY; unsigned int count = 1000; u32 reg;

+ if (addr >= ULPI_EXT_VENDOR_SPECIFIC) + ns += DWC3_ULPI_BASE_DELAY; + + if (read) + ns += DWC3_ULPI_BASE_DELAY; + while (count--) { + ndelay(ns); reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0)); if (reg & DWC3_GUSB2PHYACC_DONE) return 0; @@ -50,7 +62,7 @@ static int dwc3_ulpi_read(struct device reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr); dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);

- ret = dwc3_ulpi_busyloop(dwc); + ret = dwc3_ulpi_busyloop(dwc, addr, true); if (ret) return ret;

@@ -74,7 +86,7 @@ static int dwc3_ulpi_write(struct device reg |= DWC3_GUSB2PHYACC_WRITE | val; dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);

- return dwc3_ulpi_busyloop(dwc); + return dwc3_ulpi_busyloop(dwc, addr, false); }

static const struct ulpi_ops dwc3_ulpi_ops = {

From: Edwin Peer edwin.peer@broadcom.com

commit 3aa6bce9af0e25b735c9c1263739a5639a336ae8 upstream.

Prevent netif_tx_disable() running concurrently with dev_watchdog() by taking the device global xmit lock. Otherwise, the recommended:

netif_carrier_off(dev); netif_tx_disable(dev);

driver shutdown sequence can happen after the watchdog has already checked carrier, resulting in possible false alarms. This is because netif_tx_lock() only sets the frozen bit without maintaining the locks on the individual queues.

Fixes: c3f26a269c24 ("netdev: Fix lockdep warnings in multiqueue configurations.") Signed-off-by: Edwin Peer edwin.peer@broadcom.com Reviewed-by: Jakub Kicinski kuba@kernel.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/linux/netdevice.h | 2 ++ 1 file changed, 2 insertions(+)

--- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3674,6 +3674,7 @@ static inline void netif_tx_disable(stru

local_bh_disable(); cpu = smp_processor_id(); + spin_lock(&dev->tx_global_lock); for (i = 0; i < dev->num_tx_queues; i++) { struct netdev_queue *txq = netdev_get_tx_queue(dev, i);

@@ -3681,6 +3682,7 @@ static inline void netif_tx_disable(stru netif_tx_stop_queue(txq); __netif_tx_unlock(txq); } + spin_unlock(&dev->tx_global_lock); local_bh_enable(); }

From: Stefano Garzarella sgarzare@redhat.com

commit 1c5fae9c9a092574398a17facc31c533791ef232 upstream.

In vsock_shutdown() we touched some socket fields without holding the socket lock, such as 'state' and 'sk_flags'.

Also, after the introduction of multi-transport, we are accessing 'vsk->transport' in vsock_send_shutdown() without holding the lock and this call can be made while the connection is in progress, so the transport can change in the meantime.

To avoid issues, we hold the socket lock when we enter in vsock_shutdown() and release it when we leave.

Among the transports that implement the 'shutdown' callback, only hyperv_transport acquired the lock. Since the caller now holds it, we no longer take it.

Fixes: d021c344051a ("VSOCK: Introduce VM Sockets") Signed-off-by: Stefano Garzarella sgarzare@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/vmw_vsock/af_vsock.c | 8 +++++--- net/vmw_vsock/hyperv_transport.c | 4 ---- 2 files changed, 5 insertions(+), 7 deletions(-)

--- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -823,10 +823,12 @@ static int vsock_shutdown(struct socket */

sk = sock->sk; + + lock_sock(sk); if (sock->state == SS_UNCONNECTED) { err = -ENOTCONN; if (sk->sk_type == SOCK_STREAM) - return err; + goto out; } else { sock->state = SS_DISCONNECTING; err = 0; @@ -835,10 +837,8 @@ static int vsock_shutdown(struct socket /* Receive and send shutdowns are treated alike. */ mode = mode & (RCV_SHUTDOWN | SEND_SHUTDOWN); if (mode) { - lock_sock(sk); sk->sk_shutdown |= mode; sk->sk_state_change(sk); - release_sock(sk);

if (sk->sk_type == SOCK_STREAM) { sock_reset_flag(sk, SOCK_DONE); @@ -846,6 +846,8 @@ static int vsock_shutdown(struct socket } }

+out: + release_sock(sk); return err; }

--- a/net/vmw_vsock/hyperv_transport.c +++ b/net/vmw_vsock/hyperv_transport.c @@ -444,14 +444,10 @@ static void hvs_shutdown_lock_held(struc

static int hvs_shutdown(struct vsock_sock *vsk, int mode) { - struct sock *sk = sk_vsock(vsk); - if (!(mode & SEND_SHUTDOWN)) return 0;

- lock_sock(sk); hvs_shutdown_lock_held(vsk->trans, mode); - release_sock(sk); return 0; }

From: Randy Dunlap rdunlap@infradead.org

[ Upstream commit ade9679c159d5bbe14fb7e59e97daf6062872e2b ]

Fix a build error for undefined 'TI_PRE_COUNT' by adding it to asm-offsets.c.

h8300-linux-ld: arch/h8300/kernel/entry.o: in function `resume_kernel': (.text+0x29a): undefined reference to `TI_PRE_COUNT'

Link: https://lkml.kernel.org/r/20210212021650.22740-1-rdunlap@infradead.org Fixes: df2078b8daa7 ("h8300: Low level entry") Signed-off-by: Randy Dunlap rdunlap@infradead.org Reported-by: kernel test robot lkp@intel.com Cc: Yoshinori Sato ysato@users.sourceforge.jp Cc: Thomas Gleixner tglx@linutronix.de Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/h8300/kernel/asm-offsets.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/arch/h8300/kernel/asm-offsets.c b/arch/h8300/kernel/asm-offsets.c index 85e60509f0a83..d4b53af657c84 100644 --- a/arch/h8300/kernel/asm-offsets.c +++ b/arch/h8300/kernel/asm-offsets.c @@ -63,6 +63,9 @@ int main(void) OFFSET(TI_FLAGS, thread_info, flags); OFFSET(TI_CPU, thread_info, cpu); OFFSET(TI_PRE, thread_info, preempt_count); +#ifdef CONFIG_PREEMPTION + DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count)); +#endif

return 0; }

From: Andi Kleen ak@linux.intel.com

commit 96f60dfa5819a065bfdd2f2ba0df7d9cbce7f4dd upstream.

gcc 5 supports a new -mcount-record option to generate ftrace tables directly. This avoids the need to run record_mcount manually.

Use this option when available.

So far doesn't use -mcount-nop, which also exists now.

This is needed to make ftrace work with LTO because the normal record-mcount script doesn't run over the link time output.

It should also improve build times slightly in the general case. Link: http://lkml.kernel.org/r/20171127213423.27218-12-andi@firstfloor.org

Signed-off-by: Andi Kleen ak@linux.intel.com Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- scripts/Makefile.build | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -224,6 +224,11 @@ cmd_modversions_c = \ endif

ifdef CONFIG_FTRACE_MCOUNT_RECORD +# gcc 5 supports generating the mcount tables directly +ifneq ($(call cc-option,-mrecord-mcount,y),y) +KBUILD_CFLAGS += -mrecord-mcount +else +# else do it all manually ifdef BUILD_C_RECORDMCOUNT ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") RECORDMCOUNT_FLAGS = -w @@ -274,6 +279,7 @@ endif ifdef CONFIG_RETPOLINE objtool_args += --retpoline endif +endif

ifdef CONFIG_MODVERSIONS

From: Vasily Gorbik gor@linux.ibm.com

commit 07d0408120216b60625c9a5b8012d1c3a907984d upstream.

Currently if CONFIG_FTRACE_MCOUNT_RECORD is enabled -mrecord-mcount compiler flag support is tested for every Makefile.

Top 4 cc-option usages: 511 -mrecord-mcount 11 -fno-stack-protector 9 -Wno-override-init 2 -fsched-pressure

To address that move cc-option from scripts/Makefile.build to top Makefile and export CC_USING_RECORD_MCOUNT to be used in original place.

While doing that also add -mrecord-mcount to CC_FLAGS_FTRACE (if gcc actually supports it).

Link: http://lkml.kernel.org/r/patch-2.thread-aa7b8d.git-de935bace15a.your-ad-here...

Acked-by: Andi Kleen ak@linux.intel.com Signed-off-by: Vasily Gorbik gor@linux.ibm.com Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- Makefile | 7 +++++++ scripts/Makefile.build | 9 +++------ 2 files changed, 10 insertions(+), 6 deletions(-)

--- a/Makefile +++ b/Makefile @@ -760,6 +760,13 @@ ifdef CONFIG_FUNCTION_TRACER ifndef CC_FLAGS_FTRACE CC_FLAGS_FTRACE := -pg endif +ifdef CONFIG_FTRACE_MCOUNT_RECORD + # gcc 5 supports generating the mcount tables directly + ifeq ($(call cc-option-yn,-mrecord-mcount),y) + CC_FLAGS_FTRACE += -mrecord-mcount + export CC_USING_RECORD_MCOUNT := 1 + endif +endif export CC_FLAGS_FTRACE ifdef CONFIG_HAVE_FENTRY CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -224,11 +224,8 @@ cmd_modversions_c = \ endif

ifdef CONFIG_FTRACE_MCOUNT_RECORD -# gcc 5 supports generating the mcount tables directly -ifneq ($(call cc-option,-mrecord-mcount,y),y) -KBUILD_CFLAGS += -mrecord-mcount -else -# else do it all manually +ifndef CC_USING_RECORD_MCOUNT +# compiler will not generate __mcount_loc use recordmcount or recordmcount.pl ifdef BUILD_C_RECORDMCOUNT ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") RECORDMCOUNT_FLAGS = -w @@ -257,7 +254,7 @@ cmd_record_mcount = \ "$(CC_FLAGS_FTRACE)" ]; then \ $(sub_cmd_record_mcount) \ fi; -endif # -record-mcount +endif # CC_USING_RECORD_MCOUNT endif # CONFIG_FTRACE_MCOUNT_RECORD

ifdef CONFIG_STACK_VALIDATION

From: Jan Beulich jbeulich@suse.com

commit b512e1b077e5ccdbd6e225b15d934ab12453b70a upstream.

We should not set up further state if either mapping failed; paying attention to just the user mapping's status isn't enough.

Also use GNTST_okay instead of implying its value (zero).

This is part of XSA-361.

Signed-off-by: Jan Beulich jbeulich@suse.com Cc: stable@vger.kernel.org Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/xen/p2m.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -708,7 +708,8 @@ int set_foreign_p2m_mapping(struct gntta unsigned long mfn, pfn;

/* Do not add to override if the map failed. */ - if (map_ops[i].status) + if (map_ops[i].status != GNTST_okay || + (kmap_ops && kmap_ops[i].status != GNTST_okay)) continue;

if (map_ops[i].flags & GNTMAP_contains_pte) {

From: Jan Beulich jbeulich@suse.com

commit ebee0eab08594b2bd5db716288a4f1ae5936e9bc upstream.

Failure of the kernel part of the mapping operation should also be indicated as an error to the caller, or else it may assume the respective kernel VA is okay to access.

Furthermore gnttab_map_refs() failing still requires recording successfully mapped handles, so they can be unmapped subsequently. This in turn requires there to be a way to tell full hypercall failure from partial success - preset map_op status fields such that they won't "happen" to look as if the operation succeeded.

Also again use GNTST_okay instead of implying its value (zero).

This is part of XSA-361.

Signed-off-by: Jan Beulich jbeulich@suse.com Cc: stable@vger.kernel.org Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/xen/gntdev.c | 17 +++++++++-------- include/xen/grant_table.h | 1 + 2 files changed, 10 insertions(+), 8 deletions(-)

--- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -320,21 +320,22 @@ static int map_grant_pages(struct grant_ pr_debug("map %d+%d\n", map->index, map->count); err = gnttab_map_refs(map->map_ops, use_ptemod ? map->kmap_ops : NULL, map->pages, map->count); - if (err) - return err;

for (i = 0; i < map->count; i++) { - if (map->map_ops[i].status) { + if (map->map_ops[i].status == GNTST_okay) + map->unmap_ops[i].handle = map->map_ops[i].handle; + else if (!err) err = -EINVAL; - continue; - }

if (map->flags & GNTMAP_device_map) map->unmap_ops[i].dev_bus_addr = map->map_ops[i].dev_bus_addr;

- map->unmap_ops[i].handle = map->map_ops[i].handle; - if (use_ptemod) - map->kunmap_ops[i].handle = map->kmap_ops[i].handle; + if (use_ptemod) { + if (map->kmap_ops[i].status == GNTST_okay) + map->kunmap_ops[i].handle = map->kmap_ops[i].handle; + else if (!err) + err = -EINVAL; + } } return err; } --- a/include/xen/grant_table.h +++ b/include/xen/grant_table.h @@ -157,6 +157,7 @@ gnttab_set_map_op(struct gnttab_map_gran map->flags = flags; map->ref = ref; map->dom = domid; + map->status = 1; /* arbitrary positive value */ }

static inline void

From: Jan Beulich jbeulich@suse.com

commit 5a264285ed1cd32e26d9de4f3c8c6855e467fd63 upstream.

In particular -ENOMEM may come back here, from set_foreign_p2m_mapping(). Don't make problems worse, the more that handling elsewhere (together with map's status fields now indicating whether a mapping wasn't even attempted, and hence has to be considered failed) doesn't require this odd way of dealing with errors.

This is part of XSA-362.

Signed-off-by: Jan Beulich jbeulich@suse.com Cc: stable@vger.kernel.org Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/block/xen-blkback/blkback.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -860,10 +860,8 @@ again: break; }

- if (segs_to_map) { + if (segs_to_map) ret = gnttab_map_refs(map, NULL, pages_to_gnt, segs_to_map); - BUG_ON(ret); - }

/* * Now swizzle the MFN in our domain with the MFN from the other domain @@ -878,7 +876,7 @@ again: pr_debug("invalid buffer -- could not remap it\n"); put_free_pages(ring, &pages[seg_idx]->page, 1); pages[seg_idx]->handle = BLKBACK_INVALID_HANDLE; - ret |= 1; + ret |= !ret; goto next; } pages[seg_idx]->handle = map[new_map_idx].handle;

From: Jan Beulich jbeulich@suse.com

commit 7c77474b2d22176d2bfb592ec74e0f2cb71352c9 upstream.

In particular -ENOMEM may come back here, from set_foreign_p2m_mapping(). Don't make problems worse, the more that handling elsewhere (together with map's status fields now indicating whether a mapping wasn't even attempted, and hence has to be considered failed) doesn't require this odd way of dealing with errors.

This is part of XSA-362.

Signed-off-by: Jan Beulich jbeulich@suse.com Cc: stable@vger.kernel.org Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/xen/xen-scsiback.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/xen/xen-scsiback.c +++ b/drivers/xen/xen-scsiback.c @@ -422,12 +422,12 @@ static int scsiback_gnttab_data_map_batc return 0;

err = gnttab_map_refs(map, NULL, pg, cnt); - BUG_ON(err); for (i = 0; i < cnt; i++) { if (unlikely(map[i].status != GNTST_okay)) { pr_err("invalid buffer -- could not remap it\n"); map[i].handle = SCSIBACK_INVALID_HANDLE; - err = -ENOMEM; + if (!err) + err = -ENOMEM; } else { get_page(pg[i]); }

From: Arun Easi aeasi@marvell.com

commit 8de309e7299a00b3045fb274f82b326f356404f0 upstream

Crash stack: [576544.715489] Unable to handle kernel paging request for data at address 0xd00000000f970000 [576544.715497] Faulting instruction address: 0xd00000000f880f64 [576544.715503] Oops: Kernel access of bad area, sig: 11 [#1] [576544.715506] SMP NR_CPUS=2048 NUMA pSeries : [576544.715703] NIP [d00000000f880f64] .qla27xx_fwdt_template_valid+0x94/0x100 [qla2xxx] [576544.715722] LR [d00000000f7952dc] .qla24xx_load_risc_flash+0x2fc/0x590 [qla2xxx] [576544.715726] Call Trace: [576544.715731] [c0000004d0ffb000] [c0000006fe02c350] 0xc0000006fe02c350 (unreliable) [576544.715750] [c0000004d0ffb080] [d00000000f7952dc] .qla24xx_load_risc_flash+0x2fc/0x590 [qla2xxx] [576544.715770] [c0000004d0ffb170] [d00000000f7aa034] .qla81xx_load_risc+0x84/0x1a0 [qla2xxx] [576544.715789] [c0000004d0ffb210] [d00000000f79f7c8] .qla2x00_setup_chip+0xc8/0x910 [qla2xxx] [576544.715808] [c0000004d0ffb300] [d00000000f7a631c] .qla2x00_initialize_adapter+0x4dc/0xb00 [qla2xxx] [576544.715826] [c0000004d0ffb3e0] [d00000000f78ce28] .qla2x00_probe_one+0xf08/0x2200 [qla2xxx]

Link: https://lore.kernel.org/r/20201202132312.19966-8-njavali@marvell.com Fixes: f73cb695d3ec ("[SCSI] qla2xxx: Add support for ISP2071.") Cc: stable@vger.kernel.org Reviewed-by: Himanshu Madhani himanshu.madhani@oracle.com Signed-off-by: Arun Easi aeasi@marvell.com Signed-off-by: Nilesh Javali njavali@marvell.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com [sudip: adjust context] Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/scsi/qla2xxx/qla_tmpl.c | 9 +++++---- drivers/scsi/qla2xxx/qla_tmpl.h | 2 +- 2 files changed, 6 insertions(+), 5 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_tmpl.c +++ b/drivers/scsi/qla2xxx/qla_tmpl.c @@ -897,7 +897,8 @@ qla27xx_template_checksum(void *p, ulong static inline int qla27xx_verify_template_checksum(struct qla27xx_fwdt_template *tmp) { - return qla27xx_template_checksum(tmp, tmp->template_size) == 0; + return qla27xx_template_checksum(tmp, + le32_to_cpu(tmp->template_size)) == 0; }

static inline int @@ -913,7 +914,7 @@ qla27xx_execute_fwdt_template(struct scs ulong len;

if (qla27xx_fwdt_template_valid(tmp)) { - len = tmp->template_size; + len = le32_to_cpu(tmp->template_size); tmp = memcpy(vha->hw->fw_dump, tmp, len); ql27xx_edit_template(vha, tmp); qla27xx_walk_template(vha, tmp, tmp, &len); @@ -929,7 +930,7 @@ qla27xx_fwdt_calculate_dump_size(struct ulong len = 0;

if (qla27xx_fwdt_template_valid(tmp)) { - len = tmp->template_size; + len = le32_to_cpu(tmp->template_size); qla27xx_walk_template(vha, tmp, NULL, &len); }

@@ -941,7 +942,7 @@ qla27xx_fwdt_template_size(void *p) { struct qla27xx_fwdt_template *tmp = p;

- return tmp->template_size; + return le32_to_cpu(tmp->template_size); }

ulong --- a/drivers/scsi/qla2xxx/qla_tmpl.h +++ b/drivers/scsi/qla2xxx/qla_tmpl.h @@ -13,7 +13,7 @@ struct __packed qla27xx_fwdt_template { uint32_t template_type; uint32_t entry_offset; - uint32_t template_size; + __le32 template_size; uint32_t reserved_1;

uint32_t entry_count;

From: Manish Narani manish.narani@xilinx.com

commit 0a88fa221ce911c331bf700d2214c5b2f77414d3 upstream

Fix the MTU size issue with RX packet size as the host sends the packet with extra bytes containing ethernet header. This causes failure when user sets the MTU size to the maximum i.e. 15412. In this case the ethernet packet received will be of length 15412 plus the ethernet header length. This patch fixes the issue where there is a check that RX packet length must not be more than max packet length.

Fixes: bba787a860fa ("usb: gadget: ether: Allow jumbo frames") Signed-off-by: Manish Narani manish.narani@xilinx.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/1605597215-122027-1-git-send-email-manish.narani@x... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/function/u_ether.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -49,9 +49,10 @@ #define UETH__VERSION "29-May-2008"

/* Experiments show that both Linux and Windows hosts allow up to 16k - * frame sizes. Set the max size to 15k+52 to prevent allocating 32k + * frame sizes. Set the max MTU size to 15k+52 to prevent allocating 32k * blocks and still have efficient handling. */ -#define GETHER_MAX_ETH_FRAME_LEN 15412 +#define GETHER_MAX_MTU_SIZE 15412 +#define GETHER_MAX_ETH_FRAME_LEN (GETHER_MAX_MTU_SIZE + ETH_HLEN)

struct eth_dev { /* lock is held while accessing port_usb @@ -790,7 +791,7 @@ struct eth_dev *gether_setup_name(struct

/* MTU range: 14 - 15412 */ net->min_mtu = ETH_HLEN; - net->max_mtu = GETHER_MAX_ETH_FRAME_LEN; + net->max_mtu = GETHER_MAX_MTU_SIZE;

dev->gadget = g; SET_NETDEV_DEV(net, &g->dev); @@ -852,7 +853,7 @@ struct net_device *gether_setup_name_def

/* MTU range: 14 - 15412 */ net->min_mtu = ETH_HLEN; - net->max_mtu = GETHER_MAX_ETH_FRAME_LEN; + net->max_mtu = GETHER_MAX_MTU_SIZE;

return net; }