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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"12 hotfixes. 5 are cc:stable and the remainder address post-6.16
issues or aren't considered necessary for -stable kernels.
10 of these fixes are for MM"
* tag 'mm-hotfixes-stable-2025-08-12-20-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
proc: proc_maps_open allow proc_mem_open to return NULL
mm/mremap: avoid expensive folio lookup on mremap folio pte batch
userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry
mm: pass page directly instead of using folio_page
selftests/proc: fix string literal warning in proc-maps-race.c
fs/proc/task_mmu: hold PTL in pagemap_hugetlb_range and gather_hugetlb_stats
mm/smaps: fix race between smaps_hugetlb_range and migration
mm: fix the race between collapse and PT_RECLAIM under per-vma lock
mm/kmemleak: avoid soft lockup in __kmemleak_do_cleanup()
MAINTAINERS: add Masami as a reviewer of hung task detector
mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock
kasan/test: fix protection against compiler elision
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The NODATASUM message was printed twice by mistake and the NODATACOW was
missing from the 'unset' part. Fix the duplication and make the output
look the same.
Fixes: eddb1a433f26 ("btrfs: add reconfigure callback for fs_context")
CC: stable@vger.kernel.org # 6.8+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Kyoji Ogasawara <sawara04.o@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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After the fsconfig migration in 6.8, mount option info messages are no
longer displayed during mount operations because btrfs_emit_options() is
only called during remount, not during initial mount.
Fix this by calling btrfs_emit_options() in btrfs_fill_super() after
open_ctree() succeeds. Additionally, prevent log duplication by ensuring
btrfs_check_options() handles validation with warn-level and err-level
messages, while btrfs_emit_options() provides info-level messages.
Fixes: eddb1a433f26 ("btrfs: add reconfigure callback for fs_context")
CC: stable@vger.kernel.org # 6.8+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Kyoji Ogasawara <sawara04.o@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Fix a wrong log message that appears when the "nobarrier" mount option
is unset. When "nobarrier" is unset, barrier is actually enabled.
However, the log incorrectly stated "turning off barriers".
Fixes: eddb1a433f26 ("btrfs: add reconfigure callback for fs_context")
CC: stable@vger.kernel.org # 6.12+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Kyoji Ogasawara <sawara04.o@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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The commit f2cb97ee964a ("btrfs: index buffer_tree using node size")
changed the index of buffer_tree from "start >> sectorsize_bits" to "start
>> nodesize_bits". However, the change is not applied for
wait_eb_writebacks() and caused IO failures by writing in a full zone. Use
the index properly.
Fixes: f2cb97ee964a ("btrfs: index buffer_tree using node size")
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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btrfs_subpage_set_writeback() calls folio_start_writeback() the first time
a folio is written back, and it also clears the PAGECACHE_TAG_TOWRITE tag
even if there are still dirty blocks in the folio. This can break ordering
guarantees, such as those required by btrfs_wait_ordered_extents().
That ordering breakage leads to a real failure. For example, running
generic/464 on a zoned setup will hit the following ASSERT. This happens
because the broken ordering fails to flush existing dirty pages before the
file size is truncated.
assertion failed: !list_empty(&ordered->list) :: 0, in fs/btrfs/zoned.c:1899
------------[ cut here ]------------
kernel BUG at fs/btrfs/zoned.c:1899!
Oops: invalid opcode: 0000 [#1] SMP NOPTI
CPU: 2 UID: 0 PID: 1906169 Comm: kworker/u130:2 Kdump: loaded Not tainted 6.16.0-rc6-BTRFS-ZNS+ #554 PREEMPT(voluntary)
Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.0 02/22/2021
Workqueue: btrfs-endio-write btrfs_work_helper [btrfs]
RIP: 0010:btrfs_finish_ordered_zoned.cold+0x50/0x52 [btrfs]
RSP: 0018:ffffc9002efdbd60 EFLAGS: 00010246
RAX: 000000000000004c RBX: ffff88811923c4e0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff827e38b1 RDI: 00000000ffffffff
RBP: ffff88810005d000 R08: 00000000ffffdfff R09: ffffffff831051c8
R10: ffffffff83055220 R11: 0000000000000000 R12: ffff8881c2458c00
R13: ffff88811923c540 R14: ffff88811923c5e8 R15: ffff8881c1bd9680
FS: 0000000000000000(0000) GS:ffff88a04acd0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f907c7a918c CR3: 0000000004024000 CR4: 0000000000350ef0
Call Trace:
<TASK>
? srso_return_thunk+0x5/0x5f
btrfs_finish_ordered_io+0x4a/0x60 [btrfs]
btrfs_work_helper+0xf9/0x490 [btrfs]
process_one_work+0x204/0x590
? srso_return_thunk+0x5/0x5f
worker_thread+0x1d6/0x3d0
? __pfx_worker_thread+0x10/0x10
kthread+0x118/0x230
? __pfx_kthread+0x10/0x10
ret_from_fork+0x205/0x260
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1a/0x30
</TASK>
Consider process A calling writepages() with WB_SYNC_NONE. In zoned mode or
for compressed writes, it locks several folios for delalloc and starts
writing them out. Let's call the last locked folio folio X. Suppose the
write range only partially covers folio X, leaving some pages dirty.
Process A calls btrfs_subpage_set_writeback() when building a bio. This
function call clears the TOWRITE tag of folio X, whose size = 8K and
the block size = 4K. It is following state.
0 4K 8K
|/////|/////| (flag: DIRTY, tag: DIRTY)
<-----> Process A will write this range.
Now suppose process B concurrently calls writepages() with WB_SYNC_ALL. It
calls tag_pages_for_writeback() to tag dirty folios with
PAGECACHE_TAG_TOWRITE. Since folio X is still dirty, it gets tagged. Then,
B collects tagged folios using filemap_get_folios_tag() and must wait for
folio X to be written before returning from writepages().
0 4K 8K
|/////|/////| (flag: DIRTY, tag: DIRTY|TOWRITE)
However, between tagging and collecting, process A may call
btrfs_subpage_set_writeback() and clear folio X's TOWRITE tag.
0 4K 8K
| |/////| (flag: DIRTY|WRITEBACK, tag: DIRTY)
As a result, process B won't see folio X in its batch, and returns without
waiting for it. This breaks the WB_SYNC_ALL ordering requirement.
Fix this by using btrfs_subpage_set_writeback_keepwrite(), which retains
the TOWRITE tag. We now manually clear the tag only after the folio becomes
clean, via the xas operation.
Fixes: 3470da3b7d87 ("btrfs: subpage: introduce helpers for writeback status")
CC: stable@vger.kernel.org # 6.12+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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[POSSIBLE BUG]
After commit 5e121ae687b8 ("btrfs: use buffer xarray for extent buffer
writeback operations"), we have a dedicated xarray for extent buffers,
and a lot of tags are migrated to that buffer tree, like
PAGECACHE_TAG_TOWRITE/DIRTY/WRITEBACK.
This frees us from the limits of page flags, but there is a new
asymmetric behavior, we call buffer_tree_tag_for_writeback() to set
PAGECACHE_TAG_TOWRITE for the involved ranges, but there is no one to
clear that tag.
Before that rework, we relied on the page cache tag which was cleared
when folio_start_writeback() was called.
Although this has its own problems (e.g. the first one calling
folio_start_writeback() will clear the tag for the whole page), it at
least cleared the tag.
But now our real tags are stored in the buffer tree, no one is really
clearing the PAGECACHE_TAG_TOWRITE tag now.
[FIX]
Thankfully this is not going to cause any real bug, but just some
inefficiency iterating the extent buffers.
As if we hit an extent buffer which is not dirty but still has the
PAGECACHE_TAG_TOWRITE tag, lock_extent_buffer_for_io() will skip it so
we won't writeback the extent buffer again.
To properly fix the inefficiency, just clear the PAGECACHE_TAG_TOWRITE
inside lock_extent_buffer_for_io().
There is no error path between lock_extent_buffer_for_io() and
write_one_eb(), so we're safe to clear the tag there.
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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If we are doing an unlink for log replay, we are updating the directory's
mtime and ctime to the current time, and this is incorrect since it should
stay with the mtime and ctime that were set when the directory was logged.
This is the same as when adding a link to an inode during log replay (with
btrfs_add_link()), where we want the mtime and ctime to be the values that
were in place when the inode was logged.
This was found with generic/547 using LOAD_FACTOR=20 and TIME_FACTOR=20,
where due to large log trees we have longer log replay times and fssum
could detect a mismatch of the mtime and ctime of a directory.
Fix this by skipping the mtime and ctime update at __btrfs_unlink_inode()
if we are in log replay context (just like btrfs_add_link()).
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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[BUG]
If btrfs_writepage_cow_fixup() failed (returning value -EUCLEAN),
the block will be kept dirty, but with its corresponding range finished
in the ordered extent.
Currently that error pattern is only possible for experimental builds,
which places extra check to ensure we shouldn't hit a dirty block
without a corresponding ordered extent.
This means if later a writeback happens again, we can hit the following
problems:
- ASSERT(block_start != EXTENT_MAP_HOLE) in submit_one_sector()
If the original extent map is a hole, then we can hit this case, as
the new ordered extent failed, we will drop the new extent map and
re-read one from the disk.
- DEBUG_WARN() in btrfs_writepage_cow_fixup()
This is because we no longer have an ordered extent for those dirty
blocks. The original for them is already finished with error.
[CAUSE]
The function btrfs_writepage_cow_fixup() is not following the regular
error handling of writeback. The common practice is to clear the folio
dirty, start and finish the writeback for the block.
This is normally done by extent_clear_unlock_delalloc() with
PAGE_START_WRITEBACK | PAGE_END_WRITEBACK flags during
run_delalloc_range().
So if we keep those failed blocks dirty, they will stay in the page
cache and wait for the next writeback.
And since the original ordered extent is already finished and removed,
depending on the original extent map, we either hit the ASSERT() inside
submit_one_sector(), or hit the DEBUG_WARN() in
btrfs_writepage_cow_fixup() again (and very ironic).
[FIX]
Follow the regular error handling to clear the dirty flag for the block
range, start and finish writeback for that block range instead.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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[BUG]
If submit_one_sector() failed, the block will be kept dirty, but with
their corresponding range finished in the ordered extent.
This means if a writeback happens later again, we can hit the following
problems:
- ASSERT(block_start != EXTENT_MAP_HOLE) in submit_one_sector()
If the original extent map is a hole, then we can hit this case, as
the new ordered extent failed, we will drop the new extent map and
re-read one from the disk.
- DEBUG_WARN() in btrfs_writepage_cow_fixup()
This is because we no longer have an ordered extent for those dirty
blocks. The original for them is already finished with error.
[CAUSE]
The function submit_one_sector() is not following the regular error
handling of writeback. The common practice is to clear the folio dirty,
start and finish the writeback for the block.
This is normally done by extent_clear_unlock_delalloc() with
PAGE_START_WRITEBACK | PAGE_END_WRITEBACK flags during
run_delalloc_range().
So if we keep those failed blocks dirty, they will stay in the page
cache and wait for the next writeback.
And since the original ordered extent is already finished and removed,
depending on the original extent map, we either hit the ASSERT() inside
submit_one_sector(), or hit the DEBUG_WARN() in
btrfs_writepage_cow_fixup().
[FIX]
Follow the regular error handling to clear the dirty flag for the block,
start and finish writeback for that block instead.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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When there is no active zone limit, we can technically write into any
number of zones at the same time. However, exceeding the max open zones can
degrade performance. To prevent this, set the max_active_zones to
bdev_max_open_zones() if there is no active zone limit.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Since commit 13bb483d32ab ("btrfs: zoned: activate metadata block group on
write time"), we activate a metadata block group at the write time. If the
zone capacity is small enough, we can allocate the entire region before the
first write. Then, we hit the btrfs_zoned_bg_is_full() in
btrfs_zone_activate() and the activation fails.
For a data block group, we activate it at the allocation time and we should
check the fullness condition in the caller side. Add, a WARN to check the
fullness condition.
For a metadata block group, we don't need the fullness check because we
activate it at the write time. Instead, activating it once it is written
should be invalid. Catch that with a WARN too.
Fixes: 13bb483d32ab ("btrfs: zoned: activate metadata block group on write time")
CC: stable@vger.kernel.org # 6.6+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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btrfs_zoned_reserve_data_reloc_bg() is called on mount and at that point,
all data block groups belong to the primary data space_info. So, we don't
find anything in the data relocation space_info.
Also, the condition "bg->used > 0" can select a block group with full of
zone_unusable bytes for the candidate. As we cannot allocate from the block
group, it is useless to reserve it as the data relocation block group.
Furthermore, because of the space_info separation, we need to migrate the
selected block group to the data relocation space_info. If not, the extent
allocator cannot use the block group to do the allocation.
This commit fixes these three issues.
Fixes: e606ff985ec7 ("btrfs: zoned: reserve data_reloc block group on mount")
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Don't call ZONE FINISH for conventional zones as this will result in I/O
errors. Instead check if the zone that needs finishing is a conventional
zone and if yes skip it.
Also factor out the actual handling of finishing a single zone into a
helper function, as do_zone_finish() is growing ever bigger and the
indentations levels are getting higher.
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Replace kmalloc(size * sizeof) with kmalloc_array() for safer memory
allocation and overflow prevention.
Cc: stable@kernel.org
Signed-off-by: Liao Yuanhong <liaoyuanhong@vivo.com>
Link: https://patch.msgid.link/20250811125816.570142-1-liaoyuanhong@vivo.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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In a filesystem with a block size larger than 4KB, the hole length
calculation for a non-extent inode in ext4_ind_map_blocks() can easily
exceed INT_MAX. Then it could return a zero length hole and trigger the
following waring and infinite in the iomap infrastructure.
------------[ cut here ]------------
WARNING: CPU: 3 PID: 434101 at fs/iomap/iter.c:34 iomap_iter_done+0x148/0x190
CPU: 3 UID: 0 PID: 434101 Comm: fsstress Not tainted 6.16.0-rc7+ #128 PREEMPT(voluntary)
Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : iomap_iter_done+0x148/0x190
lr : iomap_iter+0x174/0x230
sp : ffff8000880af740
x29: ffff8000880af740 x28: ffff0000db8e6840 x27: 0000000000000000
x26: 0000000000000000 x25: ffff8000880af830 x24: 0000004000000000
x23: 0000000000000002 x22: 000001bfdbfa8000 x21: ffffa6a41c002e48
x20: 0000000000000001 x19: ffff8000880af808 x18: 0000000000000000
x17: 0000000000000000 x16: ffffa6a495ee6cd0 x15: 0000000000000000
x14: 00000000000003d4 x13: 00000000fa83b2da x12: 0000b236fc95f18c
x11: ffffa6a4978b9c08 x10: 0000000000001da0 x9 : ffffa6a41c1a2a44
x8 : ffff8000880af5c8 x7 : 0000000001000000 x6 : 0000000000000000
x5 : 0000000000000004 x4 : 000001bfdbfa8000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000004004030000 x0 : 0000000000000000
Call trace:
iomap_iter_done+0x148/0x190 (P)
iomap_iter+0x174/0x230
iomap_fiemap+0x154/0x1d8
ext4_fiemap+0x110/0x140 [ext4]
do_vfs_ioctl+0x4b8/0xbc0
__arm64_sys_ioctl+0x8c/0x120
invoke_syscall+0x6c/0x100
el0_svc_common.constprop.0+0x48/0xf0
do_el0_svc+0x24/0x38
el0_svc+0x38/0x120
el0t_64_sync_handler+0x10c/0x138
el0t_64_sync+0x198/0x1a0
---[ end trace 0000000000000000 ]---
Cc: stable@kernel.org
Fixes: facab4d9711e ("ext4: return hole from ext4_map_blocks()")
Reported-by: Qu Wenruo <wqu@suse.com>
Closes: https://lore.kernel.org/linux-ext4/9b650a52-9672-4604-a765-bb6be55d1e4a@gmx.com/
Tested-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Link: https://patch.msgid.link/20250811064532.1788289-1-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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When the file system is frozen in preparation for taking an LVM
snapshot, the journal is checkpointed and if the orphan_file feature
is enabled, and the orphan file is empty, we clear the orphan_present
feature flag. But if there are pending inodes that need to be removed
the orphan_present feature flag can't be cleared.
The problem comes if the block device is read-only. In that case, we
can't process the orphan inode list, so it is skipped in
ext4_orphan_cleanup(). But then in ext4_mark_recovery_complete(),
this results in the ext4 error "Orphan file not empty on read-only fs"
firing and the file system mount is aborted.
Fix this by clearing the needs_recovery flag in the block device is
read-only. We do this after the call to ext4_load_and_init-journal()
since there are some error checks need to be done in case the journal
needs to be replayed and the block device is read-only, or if the
block device containing the externa journal is read-only, etc.
Cc: stable@kernel.org
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1108271
Cc: stable@vger.kernel.org
Fixes: 02f310fcf47f ("ext4: Speedup ext4 orphan inode handling")
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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In some cases like small FSes with no meta_bg and where the resize
doesn't need extra gdt blocks as it can fit in the current one,
s_reserved_gdt_blocks is set as 0, which causes fsmap to emit a 0
length entry, which is incorrect.
$ mkfs.ext4 -b 65536 -O bigalloc /dev/sda 5G
$ mount /dev/sda /mnt/scratch
$ xfs_io -c "fsmap -d" /mnt/scartch
0: 253:48 [0..127]: static fs metadata 128
1: 253:48 [128..255]: special 102:1 128
2: 253:48 [256..255]: special 102:2 0 <---- 0 len entry
3: 253:48 [256..383]: special 102:3 128
Fix this by adding a check for this case.
Cc: stable@kernel.org
Fixes: 0c9ec4beecac ("ext4: support GETFSMAP ioctls")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://patch.msgid.link/08781b796453a5770112aa96ad14c864fbf31935.1754377641.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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With bigalloc enabled, the logic to report last extent has a bug since
we try to use cluster units instead of block units. This can cause an
issue where extra incorrect entries might be returned back to the
user. This was flagged by generic/365 with 64k bs and -O bigalloc.
** Details of issue **
The issue was noticed on 5G 64k blocksize FS with -O bigalloc which has
only 1 bg.
$ xfs_io -c "fsmap -d" /mnt/scratch
0: 253:48 [0..127]: static fs metadata 128 /* sb */
1: 253:48 [128..255]: special 102:1 128 /* gdt */
3: 253:48 [256..383]: special 102:3 128 /* block bitmap */
4: 253:48 [384..2303]: unknown 1920 /* flex bg empty space */
5: 253:48 [2304..2431]: special 102:4 128 /* inode bitmap */
6: 253:48 [2432..4351]: unknown 1920 /* flex bg empty space */
7: 253:48 [4352..6911]: inodes 2560
8: 253:48 [6912..538623]: unknown 531712
9: 253:48 [538624..10485759]: free space 9947136
The issue can be seen with:
$ xfs_io -c "fsmap -d 0 3" /mnt/scratch
0: 253:48 [0..127]: static fs metadata 128
1: 253:48 [384..2047]: unknown 1664
Only the first entry was expected to be returned but we get 2. This is
because:
ext4_getfsmap_datadev()
first_cluster, last_cluster = 0
...
info->gfi_last = true;
ext4_getfsmap_datadev_helper(sb, end_ag, last_cluster + 1, 0, info);
fsb = C2B(1) = 16
fslen = 0
...
/* Merge in any relevant extents from the meta_list */
list_for_each_entry_safe(p, tmp, &info->gfi_meta_list, fmr_list) {
...
// since fsb = 16, considers all metadata which starts before 16 blockno
iter 1: error = ext4_getfsmap_helper(sb, info, p); // p = sb (0,1), nop
info->gfi_next_fsblk = 1
iter 2: error = ext4_getfsmap_helper(sb, info, p); // p = gdt (1,2), nop
info->gfi_next_fsblk = 2
iter 3: error = ext4_getfsmap_helper(sb, info, p); // p = blk bitmap (2,3), nop
info->gfi_next_fsblk = 3
iter 4: error = ext4_getfsmap_helper(sb, info, p); // p = ino bitmap (18,19)
if (rec_blk > info->gfi_next_fsblk) { // (18 > 3)
// emits an extra entry ** BUG **
}
}
Fix this by directly calling ext4_getfsmap_datadev() with a dummy
record that has fmr_physical set to (end_fsb + 1) instead of
last_cluster + 1. By using the block instead of cluster we get the
correct behavior.
Replacing ext4_getfsmap_datadev_helper() with ext4_getfsmap_helper()
is okay since the gfi_lastfree and metadata checks in
ext4_getfsmap_datadev_helper() are anyways redundant when we only want
to emit the last allocated block of the range, as we have already
taken care of emitting metadata and any last free blocks.
Cc: stable@kernel.org
Reported-by: Disha Goel <disgoel@linux.ibm.com>
Fixes: 4a622e4d477b ("ext4: fix FS_IOC_GETFSMAP handling")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://patch.msgid.link/e7472c8535c9c5ec10f425f495366864ea12c9da.1754377641.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
|
|
GFP_NOWAIT already includes __GFP_NOWARN, so let's remove
the redundant __GFP_NOWARN.
Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Link: https://patch.msgid.link/20250803102243.623705-4-rongqianfeng@vivo.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
|
|
Cc: stable@kernel.org
Fixes: 90f097b1403f ("ext4: refactor the inline directory conversion and...")
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
|
|
This if branch is only jumping to 'out' which
is defined just after the branch itself.
Hence this is if-check is a no-op and can be removed.
Address-Coverity-ID: 1647981 ("Incorrect expression (IDENTICAL_BRANCHES)")
Signed-off-by: Antonio Quartulli <antonio@mandelbit.com>
Link: https://patch.msgid.link/20250721200902.1071-1-antonio@mandelbit.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
|
|
The check for a fast symlink in the presence of only an
external xattr inode is incorrect. If a fast symlink does
not have an xattr block (i_file_acl == 0), but does have
an external xattr inode that increases inode i_blocks, then
the check for a fast symlink will incorrectly fail and
__ext4_iget()->ext4_ind_check_inode() will report the inode
is corrupt when it "validates" i_data[] on the next read:
# ln -s foo /mnt/tmp/bar
# setfattr -h -n trusted.test \
-v "$(yes | head -n 4000)" /mnt/tmp/bar
# umount /mnt/tmp
# mount /mnt/tmp
# ls -l /mnt/tmp
ls: cannot access '/mnt/tmp/bar': Structure needs cleaning
total 4
? l?????????? ? ? ? ? ? bar
# dmesg | tail -1
EXT4-fs error (device dm-8): __ext4_iget:5098:
inode #24578: block 7303014: comm ls: invalid block
(note that "block 7303014" = 0x6f6f66 = "foo" in LE order).
ext4_inode_is_fast_symlink() should check the superblock
EXT4_FEATURE_INCOMPAT_EA_INODE feature flag, not the inode
EXT4_EA_INODE_FL, since the latter is only set on the xattr
inode itself, and not on the inode that uses this xattr.
Cc: stable@vger.kernel.org
Fixes: fc82228a5e38 ("ext4: support fast symlinks from ext3 file systems")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Li Dongyang <dongyangli@ddn.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/59879
Lustre-bug-id: https://jira.whamcloud.com/browse/LU-19121
Link: https://patch.msgid.link/20250717063709.757077-1-adilger@dilger.ca
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
|
|
IMA testing revealed that after an ext4 remount, file accesses triggered
full measurements even without modifications, instead of skipping as
expected when i_version is unchanged.
Debugging showed `SB_I_VERSION` was cleared in reconfigure_super() during
remount due to commit 1ff20307393e ("ext4: unconditionally enable the
i_version counter") removing the fix from commit 960e0ab63b2e ("ext4: fix
i_version handling on remount").
To rectify this, `SB_I_VERSION` is always set for `fc->sb_flags` in
ext4_init_fs_context(), instead of `sb->s_flags` in __ext4_fill_super(),
ensuring it persists across all mounts.
Cc: stable@kernel.org
Fixes: 1ff20307393e ("ext4: unconditionally enable the i_version counter")
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20250703073903.6952-2-libaokun@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
|
|
Display `i_version` in `/proc/fs/ext4/sdx/options`, even though it's
default enabled. This aids users managing multi-version scenarios and
simplifies debugging.
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20250703073903.6952-1-libaokun@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
- fix bug in qgroups reporting incorrect usage for higher level qgroups
- in zoned mode, do not select metadata group as finish target
- convert xarray lock to RCU when trying to release extent buffer to
avoid a deadlock
- do not allow relocation on partially dropped subvolumes, which is
normally not possible but has been reported on old filesystems
- in tree-log, report errors on missing block group when unaccounting
log tree extent buffers
- with large folios, fix range length when processing ordered extents
* tag 'for-6.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix iteration bug in __qgroup_excl_accounting()
btrfs: zoned: do not select metadata BG as finish target
btrfs: do not allow relocation of partially dropped subvolumes
btrfs: error on missing block group when unaccounting log tree extent buffers
btrfs: fix wrong length parameter for btrfs_cleanup_ordered_extents()
btrfs: make btrfs_cleanup_ordered_extents() support large folios
btrfs: fix subpage deadlock in try_release_subpage_extent_buffer()
|
|
The commit 65c66047259f ("proc: fix the issue of proc_mem_open returning
NULL") caused proc_maps_open() to return -ESRCH when proc_mem_open()
returns NULL. This breaks legitimate /proc/<pid>/maps access for kernel
threads since kernel threads have NULL mm_struct.
The regression causes perf to fail and exit when profiling a kernel
thread:
# perf record -v -g -p $(pgrep kswapd0)
...
couldn't open /proc/65/task/65/maps
This patch partially reverts the commit to fix it.
Link: https://lkml.kernel.org/r/20250807165455.73656-1-wjl.linux@gmail.com
Fixes: 65c66047259f ("proc: fix the issue of proc_mem_open returning NULL")
Signed-off-by: Jialin Wang <wjl.linux@gmail.com>
Cc: Penglei Jiang <superman.xpt@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
Since 'snprintf()' returns the number of characters emitted, an
output position may be advanced with this return value rather
than using an explicit calls to 'strlen()'. Compile tested only.
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
collect_sample() is used to gather samples of the data in a Write op for
analysis to try and determine if the compression algorithm is likely to
achieve anything more quickly than actually running the compression
algorithm.
However, collect_sample() assumes that the data it is going to be sampling
is stored in an ITER_XARRAY-type iterator (which it now should never be)
and doesn't actually check that it is before accessing the underlying
xarray directly.
Fix this by replacing the code with a loop that just uses the standard
iterator functions to sample every other 2KiB block, skipping the
intervening ones. It's not quite the same as the previous algorithm as it
doesn't necessarily align to the pages within an ordinary write from the
pagecache.
Note that the btrfs code from which this was derived samples the inode's
pagecache directly rather than the iterator - but that doesn't necessarily
work for network filesystems if O_DIRECT is in operation.
Fixes: 94ae8c3fee94 ("smb: client: compress: LZ77 code improvements cleanup")
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
cc: Enzo Matsumiya <ematsumiya@suse.de>
cc: Shyam Prasad N <sprasad@microsoft.com>
cc: Tom Talpey <tom@talpey.com>
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fixes from Chuck Lever:
- A correctness fix for delegated timestamps
- Address an NFSD shutdown hang when LOCALIO is in use
- Prevent a remotely exploitable crasher when TLS is in use
* tag 'nfsd-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
sunrpc: fix handling of server side tls alerts
nfsd: avoid ref leak in nfsd_open_local_fh()
nfsd: don't set the ctime on delegated atime updates
|
|
Christoph suggested that the explicit _GPL_ can be dropped from the
module namespace export macro, as it's intended for in-tree modules
only. It would be possible to restrict it technically, but it was
pointed out [2] that some cases of using an out-of-tree build of an
in-tree module with the same name are legitimate. But in that case those
also have to be GPL anyway so it's unnecessary to spell it out in the
macro name.
Link: https://lore.kernel.org/all/aFleJN_fE-RbSoFD@infradead.org/ [1]
Link: https://lore.kernel.org/all/CAK7LNATRkZHwJGpojCnvdiaoDnP%2BaeUXgdey5sb_8muzdWTMkA@mail.gmail.com/ [2]
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Shivank Garg <shivankg@amd.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Nicolas Schier <n.schier@avm.de>
Reviewed-by: Daniel Gomez <da.gomez@samsung.com>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Link: https://lore.kernel.org/20250808-export_modules-v4-1-426945bcc5e1@suse.cz
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
|
The lflags value used to look up from_path was overwritten by the one used
to look up to_path.
In other words, from_path was looked up with the wrong lflags value. Fix it.
Fixes: f9fde814de37 ("fs: support getname_maybe_null() in move_mount()")
Signed-off-by: Yuntao Wang <yuntao.wang@linux.dev>
Link: https://lore.kernel.org/20250811052426.129188-1-yuntao.wang@linux.dev
[Christian Brauner <brauner@kernel.org>: massage patch]
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
|
With fuse now using iomap for writeback handling, inode blkbits changes
are problematic because iomap relies on inode->i_blkbits for its
internal bitmap logic. Currently we change inode->i_blkbits in fuse to
match the attr->blksize value passed in by the server.
This commit keeps inode->i_blkbits constant in fuse. Any attr->blksize
values passed in by the server will not update inode->i_blkbits. The
client-side behavior for stat is unaffected, stat will still reflect the
blocksize passed in by the server.
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Link: https://lore.kernel.org/20250807175015.515192-1-joannelkoong@gmail.com
Fixes: ef7e7cbb32 ("fuse: use iomap for writeback")
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
|
As described in commit 7a54947e727b ('Merge patch series "fs: allow
changing idmappings"'), open_tree_attr(2) was necessary in order to
allow for a detached mount to be created and have its idmappings changed
without the risk of any racing threads operating on it. For this reason,
mount_setattr(2) still does not allow for id-mappings to be changed.
However, there was a bug in commit 2462651ffa76 ("fs: allow changing
idmappings") which allowed users to bypass this restriction by calling
open_tree_attr(2) *without* OPEN_TREE_CLONE.
can_idmap_mount() prevented this bug from allowing an attached
mountpoint's id-mapping from being modified (thanks to an is_anon_ns()
check), but this still allows for detached (but visible) mounts to have
their be id-mapping changed. This risks the same UAF and locking issues
as described in the merge commit, and was likely unintentional.
Fixes: 2462651ffa76 ("fs: allow changing idmappings")
Cc: stable@vger.kernel.org # v6.15+
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Link: https://lore.kernel.org/20250808-open_tree_attr-bugfix-idmap-v1-1-0ec7bc05646c@cyphar.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
|
Commit d279c80e0bac ("iomap: inline iomap_dio_bio_opflags()") has broken
the logic in iomap_dio_bio_iter() in a way that when the device does
support FUA (or has no writeback cache) and the direct IO happens to
freshly allocated or unwritten extents, we will *not* issue fsync after
completing direct IO O_SYNC / O_DSYNC write because the
IOMAP_DIO_WRITE_THROUGH flag stays mistakenly set. Fix the problem by
clearing IOMAP_DIO_WRITE_THROUGH whenever we do not perform FUA write as
it was originally intended.
CC: John Garry <john.g.garry@oracle.com>
CC: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Fixes: d279c80e0bac ("iomap: inline iomap_dio_bio_opflags()")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/20250730102840.20470-2-jack@suse.cz
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
|
An use-after-free issue occurred when __mark_inode_dirty() get the
bdi_writeback that was in the progress of switching.
CPU: 1 PID: 562 Comm: systemd-random- Not tainted 6.6.56-gb4403bd46a8e #1
......
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __mark_inode_dirty+0x124/0x418
lr : __mark_inode_dirty+0x118/0x418
sp : ffffffc08c9dbbc0
........
Call trace:
__mark_inode_dirty+0x124/0x418
generic_update_time+0x4c/0x60
file_modified+0xcc/0xd0
ext4_buffered_write_iter+0x58/0x124
ext4_file_write_iter+0x54/0x704
vfs_write+0x1c0/0x308
ksys_write+0x74/0x10c
__arm64_sys_write+0x1c/0x28
invoke_syscall+0x48/0x114
el0_svc_common.constprop.0+0xc0/0xe0
do_el0_svc+0x1c/0x28
el0_svc+0x40/0xe4
el0t_64_sync_handler+0x120/0x12c
el0t_64_sync+0x194/0x198
Root cause is:
systemd-random-seed kworker
----------------------------------------------------------------------
___mark_inode_dirty inode_switch_wbs_work_fn
spin_lock(&inode->i_lock);
inode_attach_wb
locked_inode_to_wb_and_lock_list
get inode->i_wb
spin_unlock(&inode->i_lock);
spin_lock(&wb->list_lock)
spin_lock(&inode->i_lock)
inode_io_list_move_locked
spin_unlock(&wb->list_lock)
spin_unlock(&inode->i_lock)
spin_lock(&old_wb->list_lock)
inode_do_switch_wbs
spin_lock(&inode->i_lock)
inode->i_wb = new_wb
spin_unlock(&inode->i_lock)
spin_unlock(&old_wb->list_lock)
wb_put_many(old_wb, nr_switched)
cgwb_release
old wb released
wb_wakeup_delayed() accesses wb,
then trigger the use-after-free
issue
Fix this race condition by holding inode spinlock until
wb_wakeup_delayed() finished.
Signed-off-by: Jiufei Xue <jiufei.xue@samsung.com>
Link: https://lore.kernel.org/20250728100715.3863241-1-jiufei.xue@samsung.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
|
xfs_zone_record_blocks not only records successfully written blocks that
now back file data, but is also used for blocks speculatively written by
garbage collection that were never linked to an inode and instantly
become invalid.
Split the latter functionality out to be easier to understand. This also
make it clear that we don't need to attach the rmap inode to a
transaction for the skipped blocks case as we never dirty any peristent
data structure.
Also make the argument order to xfs_zone_record_blocks a bit more
natural.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
The quotacheck doesn't initialize sc->ip.
Cc: stable@vger.kernel.org # v6.8
Fixes: 21d7500929c8a0 ("xfs: improve dquot iteration for scrub")
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
If the FS has no reflink, then atomic writes greater than 1x block are not
supported. As such, for no reflink it is pointless to accept setting
max_atomic_write when it cannot be supported, so reject max_atomic_write
mount option in this case.
It could be still possible to accept max_atomic_write option of size 1x
block if HW atomics are supported, so check for this specifically.
Fixes: 4528b9052731 ("xfs: allow sysadmins to specify a maximum atomic write limit at mount time")
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
Atomic writes are not currently supported for DAX, but two problems exist:
- we may go down DAX write path for IOCB_ATOMIC, which does not handle
IOCB_ATOMIC properly
- we report non-zero atomic write limits in statx (for DAX inodes)
We may want atomic writes support on DAX in future, but just disallow for
now.
For this, ensure when IOCB_ATOMIC is set that we check the write size
versus the atomic write min and max before branching off to the DAX write
path. This is not strictly required for DAX, as we should not get this far
in the write path as FMODE_CAN_ATOMIC_WRITE should not be set.
In addition, due to reflink being supported for DAX, we automatically get
CoW-based atomic writes support being advertised. Remedy this by
disallowing atomic writes for a DAX inode for both sw and hw modes.
Reported-by: Darrick J. Wong <djwong@kernel.org>
Fixes: 9dffc58f2384 ("xfs: update atomic write limits")
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
The DAX write path does not support IOCB_ATOMIC, so reject it when set.
Suggested-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
Add a new field to struct xfs_ibulk to directly pass XFS_IWALK* flags,
and thus remove the need to indirect the SAME_AG flag through
XFS_IBULK*.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
Fix up xfs_inumbers to now pass in the XFS_IBULK* flags into the flags
argument to xfs_inobt_walk, which expects the XFS_IWALK* flags.
Currently passing the wrong flags works for non-debug builds because
the only XFS_IWALK* flag has the same encoding as the corresponding
XFS_IBULK* flag, but in debug builds it can trigger an assert that no
incorrect flag is passed. Instead just extra the relevant flag.
Fixes: 5b35d922c52798 ("xfs: Decouple XFS_IBULK flags from XFS_IWALK flags")
Cc: <stable@vger.kernel.org> # v5.19
Reported-by: cen zhang <zzzccc427@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
Commit 83a80e95e797 ("xfs: decouple xfs_trans_alloc_empty from
xfs_trans_alloc") move the place of the assert for a frozen file system
after the sb_start_intwrite call that ensures it doesn't run on frozen
file systems, and thus allows to incorrect trigger it.
Fix that by moving it back to where it belongs.
Fixes: 83a80e95e797 ("xfs: decouple xfs_trans_alloc_empty from xfs_trans_alloc")
Reported-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
|
|
Fix incorrect shift order when combining the 48-bit block count.
Fixes: 2e1473d5195f ("erofs: implement 48-bit block addressing for unencoded inodes")
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250807082019.3093539-1-hsiangkao@linux.alibaba.com
|
|
Since EROFS handles decompression in non-atomic contexts due to
uncontrollable decompression latencies and vmap() usage, it tries
to detect atomic contexts and only kicks off a kworker on demand
in order to reduce unnecessary scheduling overhead.
However, the current approach is insufficient and can lead to
sleeping function calls in invalid contexts, causing kernel
warnings and potential system instability. See the stacktrace [1]
and previous discussion [2].
The current implementation only checks rcu_read_lock_any_held(),
which behaves inconsistently across different kernel configurations:
- When CONFIG_DEBUG_LOCK_ALLOC is enabled: correctly detects
RCU critical sections by checking rcu_lock_map
- When CONFIG_DEBUG_LOCK_ALLOC is disabled: compiles to
"!preemptible()", which only checks preempt_count and misses
RCU critical sections
This patch introduces z_erofs_in_atomic() to provide comprehensive
atomic context detection:
1. Check RCU preemption depth when CONFIG_PREEMPTION is enabled,
as RCU critical sections may not affect preempt_count but still
require atomic handling
2. Always use async processing when CONFIG_PREEMPT_COUNT is disabled,
as preemption state cannot be reliably determined
3. Fall back to standard preemptible() check for remaining cases
The function replaces the previous complex condition check and ensures
that z_erofs always uses (kthread_)work in atomic contexts to minimize
scheduling overhead and prevent sleeping in invalid contexts.
[1] Problem stacktrace
[ 61.266692] BUG: sleeping function called from invalid context at kernel/locking/rtmutex_api.c:510
[ 61.266702] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 107, name: irq/54-ufshcd
[ 61.266704] preempt_count: 0, expected: 0
[ 61.266705] RCU nest depth: 2, expected: 0
[ 61.266710] CPU: 0 UID: 0 PID: 107 Comm: irq/54-ufshcd Tainted: G W O 6.12.17 #1
[ 61.266714] Tainted: [W]=WARN, [O]=OOT_MODULE
[ 61.266715] Hardware name: schumacher (DT)
[ 61.266717] Call trace:
[ 61.266718] dump_backtrace+0x9c/0x100
[ 61.266727] show_stack+0x20/0x38
[ 61.266728] dump_stack_lvl+0x78/0x90
[ 61.266734] dump_stack+0x18/0x28
[ 61.266736] __might_resched+0x11c/0x180
[ 61.266743] __might_sleep+0x64/0xc8
[ 61.266745] mutex_lock+0x2c/0xc0
[ 61.266748] z_erofs_decompress_queue+0xe8/0x978
[ 61.266753] z_erofs_decompress_kickoff+0xa8/0x190
[ 61.266756] z_erofs_endio+0x168/0x288
[ 61.266758] bio_endio+0x160/0x218
[ 61.266762] blk_update_request+0x244/0x458
[ 61.266766] scsi_end_request+0x38/0x278
[ 61.266770] scsi_io_completion+0x4c/0x600
[ 61.266772] scsi_finish_command+0xc8/0xe8
[ 61.266775] scsi_complete+0x88/0x148
[ 61.266777] blk_mq_complete_request+0x3c/0x58
[ 61.266780] scsi_done_internal+0xcc/0x158
[ 61.266782] scsi_done+0x1c/0x30
[ 61.266783] ufshcd_compl_one_cqe+0x12c/0x438
[ 61.266786] __ufshcd_transfer_req_compl+0x2c/0x78
[ 61.266788] ufshcd_poll+0xf4/0x210
[ 61.266789] ufshcd_transfer_req_compl+0x50/0x88
[ 61.266791] ufshcd_intr+0x21c/0x7c8
[ 61.266792] irq_forced_thread_fn+0x44/0xd8
[ 61.266796] irq_thread+0x1a4/0x358
[ 61.266799] kthread+0x12c/0x138
[ 61.266802] ret_from_fork+0x10/0x20
[2] https://lore.kernel.org/r/58b661d0-0ebb-4b45-a10d-c5927fb791cd@paulmck-laptop
Signed-off-by: Junli Liu <liujunli@lixiang.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250805011957.911186-1-liujunli@lixiang.com
[ Gao Xiang: Use the original trace in v1. ]
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
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The EROFS filesystem has many configurable options, controlled through
boolean Kconfig symbols. When enabled, these options may need to enable
additional library functionality elsewhere. Currently this is done by
selecting the symbol for the additional functionality. However, if
EROFS_FS itself is modular, and the target symbol is a tristate symbol,
the additional functionality is always forced built-in.
Selecting tristate symbols from a tristate symbol does keep modular
transitivity. Hence fix this by moving selects of tristate symbols to
the main EROFS_FS symbol.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/da1b899e511145dd43fd2d398f64b2e03c6a39e7.1753879351.git.geert+renesas@glider.be
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
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If using multiple devices, we should check if the extra device support
DAX instead of checking the primary device when deciding if to use DAX
to access a file.
If an extra device does not support DAX we should fallback to normal
access otherwise the data on that device will be inaccessible.
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Friendy Su <friendy.su@sony.com>
Reviewed-by: Jacky Cao <jacky.cao@sony.com>
Reviewed-by: Daniel Palmer <daniel.palmer@sony.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://lore.kernel.org/r/20250804082030.3667257-2-Yuezhang.Mo@sony.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
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Besides sending the rename request to the server, the rename process
also involves closing any deferred close, waiting for outstanding I/O
to complete as well as marking all existing open handles as deleted to
prevent them from deferring closes, which increases the race window
for potential concurrent opens on the target file.
Fix this by unhashing the dentry in advance to prevent any concurrent
opens on the target.
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
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According to some logs reported by customers, CIFS client might end up
reporting unlinked files as existing in stat(2) due to concurrent
opens racing with unlink(2).
Besides sending the removal request to the server, the unlink process
could involve closing any deferred close as well as marking all
existing open handles as deleted to prevent them from deferring
closes, which increases the race window for potential concurrent
opens.
Fix this by unhashing the dentry in cifs_unlink() to prevent any
subsequent opens. Any open attempts, while we're still unlinking,
will block on parent's i_rwsem.
Reported-by: Jay Shin <jaeshin@redhat.com>
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
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