Although there are several patches improving the extent map shrinker,
there are still reports of too frequent shrinker behavior, taking too
much CPU for the kswapd process.

So let's only enable extent shrinker for now, until we got more
comprehensive understanding and a better solution.

Link: https://lore.kernel.org/linux-btrfs/3df4acd616a07ef4d2dc6bad668701504b412ffc.camel@intelfx.name/
Link: https://lore.kernel.org/linux-btrfs/c30fd6b3-ca7a-4759-8a53-d42878bf84f7@gmail.com/
Fixes: 956a17d9 ("btrfs: add a shrinker for extent maps")
CC: stable@vger.kernel.org # 6.10+
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

__btrfs_add_free_space_zoned() references and modifies bg's alloc_offset,
ro, and zone_unusable, but without taking the lock. It is mostly safe
because they monotonically increase (at least for now) and this function is
mostly called by a transaction commit, which is serialized by itself.

Still, taking the lock is a safer and correct option and I'm going to add a
change to reset zone_unusable while a block group is still alive. So, add
locking around the operations.

Fixes: 169e0da9 ("btrfs: zoned: track unusable bytes for zones")
CC: stable@vger.kernel.org # 5.15+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

[REPORT]
There is a corruption report that btrfs refused to mount a fs that has
overlapping dev extents:

  BTRFS error (device sdc): dev extent devid 4 physical offset 14263979671552 overlap with previous dev extent end 14263980982272
  BTRFS error (device sdc): failed to verify dev extents against chunks: -117
  BTRFS error (device sdc): open_ctree failed

[CAUSE]
The direct cause is very obvious, there is a bad dev extent item with
incorrect length.

With btrfs check reporting two overlapping extents, the second one shows
some clue on the cause:

  ERROR: dev extent devid 4 offset 14263979671552 len 6488064 overlap with previous dev extent end 14263980982272
  ERROR: dev extent devid 13 offset 2257707008000 len 6488064 overlap with previous dev extent end 2257707270144
  ERROR: errors found in extent allocation tree or chunk allocation

The second one looks like a bitflip happened during new chunk
allocation:
hex(2257707008000) = 0x20da9d30000
hex(2257707270144) = 0x20da9d70000
diff               = 0x00000040000

So it looks like a bitflip happened during new dev extent allocation,
resulting the second overlap.

Currently we only do the dev-extent verification at mount time, but if the
corruption is caused by memory bitflip, we really want to catch it before
writing the corruption to the storage.

Furthermore the dev extent items has the following key definition:

	(<device id> DEV_EXTENT <physical offset>)

Thus we can not just rely on the generic key order check to make sure
there is no overlapping.

[ENHANCEMENT]
Introduce dedicated dev extent checks, including:

- Fixed member checks
  * chunk_tree should always be BTRFS_CHUNK_TREE_OBJECTID (3)
  * chunk_objectid should always be
    BTRFS_FIRST_CHUNK_CHUNK_TREE_OBJECTID (256)

- Alignment checks
  * chunk_offset should be aligned to sectorsize
  * length should be aligned to sectorsize
  * key.offset should be aligned to sectorsize

- Overlap checks
  If the previous key is also a dev-extent item, with the same
  device id, make sure we do not overlap with the previous dev extent.

Reported: Stefan N <stefannnau@gmail.com>
Link: https://lore.kernel.org/linux-btrfs/CA+W5K0rSO3koYTo=nzxxTm1-Pdu1HYgVxEpgJ=aGc7d=E8mGEg@mail.gmail.com/
CC: stable@vger.kernel.org # 5.10+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Unlink changes the link count on the target inode. POSIX mandates that
the ctime must also change when this occurs.

According to https://pubs.opengroup.org/onlinepubs/9699919799/functions/unlink.html:

"Upon successful completion, unlink() shall mark for update the last data
 modification and last file status change timestamps of the parent
 directory. Also, if the file's link count is not 0, the last file status
 change timestamp of the file shall be marked for update."
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add link to the opengroup docs ]
Signed-off-by: David Sterba <dsterba@suse.com>

Add the __counted_by compiler attribute to the flexible array member
name to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

In __extent_writepage_io(), we call btrfs_set_range_writeback() ->
folio_start_writeback(), which clears PAGECACHE_TAG_DIRTY mark from the
mapping xarray if the folio is not dirty. This worked fine before commit
97713b1a ("btrfs: do not clear page dirty inside
extent_write_locked_range()").

After the commit, however, the folio is still dirty at this point, so the
mapping DIRTY tag is not cleared anymore. Then, __extent_writepage_io()
calls btrfs_folio_clear_dirty() to clear the folio's dirty flag. That
results in the page being unlocked with a "strange" state. The page is not
PageDirty, but the mapping tag is set as PAGECACHE_TAG_DIRTY.

This strange state looks like causing a hang with a call trace below when
running fstests generic/091 on a null_blk device. It is waiting for a folio
lock.

While I don't have an exact relation between this hang and the strange
state, fixing the state also fixes the hang. And, that state is worth
fixing anyway.

This commit reorders btrfs_folio_clear_dirty() and
btrfs_set_range_writeback() in __extent_writepage_io(), so that the
PAGECACHE_TAG_DIRTY tag is properly removed from the xarray.

  [464.274] task:fsx             state:D stack:0     pid:3034  tgid:3034  ppid:2853   flags:0x00004002
  [464.286] Call Trace:
  [464.291]  <TASK>
  [464.295]  __schedule+0x10ed/0x6260
  [464.301]  ? __pfx___blk_flush_plug+0x10/0x10
  [464.308]  ? __submit_bio+0x37c/0x450
  [464.314]  ? __pfx___schedule+0x10/0x10
  [464.321]  ? lock_release+0x567/0x790
  [464.327]  ? __pfx_lock_acquire+0x10/0x10
  [464.334]  ? __pfx_lock_release+0x10/0x10
  [464.340]  ? __pfx_lock_acquire+0x10/0x10
  [464.347]  ? __pfx_lock_release+0x10/0x10
  [464.353]  ? do_raw_spin_lock+0x12e/0x270
  [464.360]  schedule+0xdf/0x3b0
  [464.365]  io_schedule+0x8f/0xf0
  [464.371]  folio_wait_bit_common+0x2ca/0x6d0
  [464.378]  ? folio_wait_bit_common+0x1cc/0x6d0
  [464.385]  ? __pfx_folio_wait_bit_common+0x10/0x10
  [464.392]  ? __pfx_filemap_get_folios_tag+0x10/0x10
  [464.400]  ? __pfx_wake_page_function+0x10/0x10
  [464.407]  ? __pfx___might_resched+0x10/0x10
  [464.414]  ? do_raw_spin_unlock+0x58/0x1f0
  [464.420]  extent_write_cache_pages+0xe49/0x1620 [btrfs]
  [464.428]  ? lock_acquire+0x435/0x500
  [464.435]  ? __pfx_extent_write_cache_pages+0x10/0x10 [btrfs]
  [464.443]  ? btrfs_do_write_iter+0x493/0x640 [btrfs]
  [464.451]  ? orc_find.part.0+0x1d4/0x380
  [464.457]  ? __pfx_lock_release+0x10/0x10
  [464.464]  ? __pfx_lock_release+0x10/0x10
  [464.471]  ? btrfs_do_write_iter+0x493/0x640 [btrfs]
  [464.478]  btrfs_writepages+0x1cc/0x460 [btrfs]
  [464.485]  ? __pfx_btrfs_writepages+0x10/0x10 [btrfs]
  [464.493]  ? is_bpf_text_address+0x6e/0x100
  [464.500]  ? kernel_text_address+0x145/0x160
  [464.507]  ? unwind_get_return_address+0x5e/0xa0
  [464.514]  ? arch_stack_walk+0xac/0x100
  [464.521]  do_writepages+0x176/0x780
  [464.527]  ? lock_release+0x567/0x790
  [464.533]  ? __pfx_do_writepages+0x10/0x10
  [464.540]  ? __pfx_lock_acquire+0x10/0x10
  [464.546]  ? __pfx_stack_trace_save+0x10/0x10
  [464.553]  ? do_raw_spin_lock+0x12e/0x270
  [464.560]  ? do_raw_spin_unlock+0x58/0x1f0
  [464.566]  ? _raw_spin_unlock+0x23/0x40
  [464.573]  ? wbc_attach_and_unlock_inode+0x3da/0x7d0
  [464.580]  filemap_fdatawrite_wbc+0x113/0x180
  [464.587]  ? prepare_pages.constprop.0+0x13c/0x5c0 [btrfs]
  [464.596]  __filemap_fdatawrite_range+0xaf/0xf0
  [464.603]  ? __pfx___filemap_fdatawrite_range+0x10/0x10
  [464.611]  ? trace_irq_enable.constprop.0+0xce/0x110
  [464.618]  ? kasan_quarantine_put+0xd7/0x1e0
  [464.625]  btrfs_start_ordered_extent+0x46f/0x570 [btrfs]
  [464.633]  ? __pfx_btrfs_start_ordered_extent+0x10/0x10 [btrfs]
  [464.642]  ? __clear_extent_bit+0x2c0/0x9d0 [btrfs]
  [464.650]  btrfs_lock_and_flush_ordered_range+0xc6/0x180 [btrfs]
  [464.659]  ? __pfx_btrfs_lock_and_flush_ordered_range+0x10/0x10 [btrfs]
  [464.669]  btrfs_read_folio+0x12a/0x1d0 [btrfs]
  [464.676]  ? __pfx_btrfs_read_folio+0x10/0x10 [btrfs]
  [464.684]  ? __pfx_filemap_add_folio+0x10/0x10
  [464.691]  ? __pfx___might_resched+0x10/0x10
  [464.698]  ? __filemap_get_folio+0x1c5/0x450
  [464.705]  prepare_uptodate_page+0x12e/0x4d0 [btrfs]
  [464.713]  prepare_pages.constprop.0+0x13c/0x5c0 [btrfs]
  [464.721]  ? fault_in_iov_iter_readable+0xd2/0x240
  [464.729]  btrfs_buffered_write+0x5bd/0x12f0 [btrfs]
  [464.737]  ? __pfx_btrfs_buffered_write+0x10/0x10 [btrfs]
  [464.745]  ? __pfx_lock_release+0x10/0x10
  [464.752]  ? generic_write_checks+0x275/0x400
  [464.759]  ? down_write+0x118/0x1f0
  [464.765]  ? up_write+0x19b/0x500
  [464.770]  btrfs_direct_write+0x731/0xba0 [btrfs]
  [464.778]  ? __pfx_btrfs_direct_write+0x10/0x10 [btrfs]
  [464.785]  ? __pfx___might_resched+0x10/0x10
  [464.792]  ? lock_acquire+0x435/0x500
  [464.798]  ? lock_acquire+0x435/0x500
  [464.804]  btrfs_do_write_iter+0x494/0x640 [btrfs]
  [464.811]  ? __pfx_btrfs_do_write_iter+0x10/0x10 [btrfs]
  [464.819]  ? __pfx___might_resched+0x10/0x10
  [464.825]  ? rw_verify_area+0x6d/0x590
  [464.831]  vfs_write+0x5d7/0xf50
  [464.837]  ? __might_fault+0x9d/0x120
  [464.843]  ? __pfx_vfs_write+0x10/0x10
  [464.849]  ? btrfs_file_llseek+0xb1/0xfb0 [btrfs]
  [464.856]  ? lock_release+0x567/0x790
  [464.862]  ksys_write+0xfb/0x1d0
  [464.867]  ? __pfx_ksys_write+0x10/0x10
  [464.873]  ? _raw_spin_unlock+0x23/0x40
  [464.879]  ? btrfs_getattr+0x4af/0x670 [btrfs]
  [464.886]  ? vfs_getattr_nosec+0x79/0x340
  [464.892]  do_syscall_64+0x95/0x180
  [464.898]  ? __do_sys_newfstat+0xde/0xf0
  [464.904]  ? __pfx___do_sys_newfstat+0x10/0x10
  [464.911]  ? trace_irq_enable.constprop.0+0xce/0x110
  [464.918]  ? syscall_exit_to_user_mode+0xac/0x2a0
  [464.925]  ? do_syscall_64+0xa1/0x180
  [464.931]  ? trace_irq_enable.constprop.0+0xce/0x110
  [464.939]  ? trace_irq_enable.constprop.0+0xce/0x110
  [464.946]  ? syscall_exit_to_user_mode+0xac/0x2a0
  [464.953]  ? btrfs_file_llseek+0xb1/0xfb0 [btrfs]
  [464.960]  ? do_syscall_64+0xa1/0x180
  [464.966]  ? btrfs_file_llseek+0xb1/0xfb0 [btrfs]
  [464.973]  ? trace_irq_enable.constprop.0+0xce/0x110
  [464.980]  ? syscall_exit_to_user_mode+0xac/0x2a0
  [464.987]  ? __pfx_btrfs_file_llseek+0x10/0x10 [btrfs]
  [464.995]  ? trace_irq_enable.constprop.0+0xce/0x110
  [465.002]  ? __pfx_btrfs_file_llseek+0x10/0x10 [btrfs]
  [465.010]  ? do_syscall_64+0xa1/0x180
  [465.016]  ? lock_release+0x567/0x790
  [465.022]  ? __pfx_lock_acquire+0x10/0x10
  [465.028]  ? __pfx_lock_release+0x10/0x10
  [465.034]  ? trace_irq_enable.constprop.0+0xce/0x110
  [465.042]  ? syscall_exit_to_user_mode+0xac/0x2a0
  [465.049]  ? do_syscall_64+0xa1/0x180
  [465.055]  ? syscall_exit_to_user_mode+0xac/0x2a0
  [465.062]  ? do_syscall_64+0xa1/0x180
  [465.068]  ? syscall_exit_to_user_mode+0xac/0x2a0
  [465.075]  ? do_syscall_64+0xa1/0x180
  [465.081]  ? clear_bhb_loop+0x25/0x80
  [465.087]  ? clear_bhb_loop+0x25/0x80
  [465.093]  ? clear_bhb_loop+0x25/0x80
  [465.099]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
  [465.106] RIP: 0033:0x7f093b8ee784
  [465.111] RSP: 002b:00007ffc29d31b28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
  [465.122] RAX: ffffffffffffffda RBX: 0000000000006000 RCX: 00007f093b8ee784
  [465.131] RDX: 000000000001de00 RSI: 00007f093b6ed200 RDI: 0000000000000003
  [465.141] RBP: 000000000001de00 R08: 0000000000006000 R09: 0000000000000000
  [465.150] R10: 0000000000023e00 R11: 0000000000000202 R12: 0000000000006000
  [465.160] R13: 0000000000023e00 R14: 0000000000023e00 R15: 0000000000000001
  [465.170]  </TASK>
  [465.174] INFO: lockdep is turned off.
Reported-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Fixes: 97713b1a ("btrfs: do not clear page dirty inside extent_write_locked_range()")
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

If we a find that an extent is shared but its end offset is not sector
size aligned, then we don't clone it and issue write operations instead.
This is because the reflink (remap_file_range) operation does not allow
to clone unaligned ranges, except if the end offset of the range matches
the i_size of the source and destination files (and the start offset is
sector size aligned).

While this is not incorrect because send can only guarantee that a file
has the same data in the source and destination snapshots, it's not
optimal and generates confusion and surprising behaviour for users.

For example, running this test:

  $ cat test.sh
  #!/bin/bash

  DEV=/dev/sdi
  MNT=/mnt/sdi

  mkfs.btrfs -f $DEV
  mount $DEV $MNT

  # Use a file size not aligned to any possible sector size.
  file_size=$((1 * 1024 * 1024 + 5)) # 1MB + 5 bytes
  dd if=/dev/random of=$MNT/foo bs=$file_size count=1
  cp --reflink=always $MNT/foo $MNT/bar

  btrfs subvolume snapshot -r $MNT/ $MNT/snap
  rm -f /tmp/send-test
  btrfs send -f /tmp/send-test $MNT/snap

  umount $MNT
  mkfs.btrfs -f $DEV
  mount $DEV $MNT

  btrfs receive -vv -f /tmp/send-test $MNT

  xfs_io -r -c "fiemap -v" $MNT/snap/bar

  umount $MNT

Gives the following result:

  (...)
  mkfile o258-7-0
  rename o258-7-0 -> bar
  write bar - offset=0 length=49152
  write bar - offset=49152 length=49152
  write bar - offset=98304 length=49152
  write bar - offset=147456 length=49152
  write bar - offset=196608 length=49152
  write bar - offset=245760 length=49152
  write bar - offset=294912 length=49152
  write bar - offset=344064 length=49152
  write bar - offset=393216 length=49152
  write bar - offset=442368 length=49152
  write bar - offset=491520 length=49152
  write bar - offset=540672 length=49152
  write bar - offset=589824 length=49152
  write bar - offset=638976 length=49152
  write bar - offset=688128 length=49152
  write bar - offset=737280 length=49152
  write bar - offset=786432 length=49152
  write bar - offset=835584 length=49152
  write bar - offset=884736 length=49152
  write bar - offset=933888 length=49152
  write bar - offset=983040 length=49152
  write bar - offset=1032192 length=16389
  chown bar - uid=0, gid=0
  chmod bar - mode=0644
  utimes bar
  utimes
  BTRFS_IOC_SET_RECEIVED_SUBVOL uuid=06d640da-9ca1-604c-b87c-3375175a8eb3, stransid=7
  /mnt/sdi/snap/bar:
   EXT: FILE-OFFSET      BLOCK-RANGE      TOTAL FLAGS
     0: [0..2055]:       26624..28679      2056   0x1

There's no clone operation to clone extents from the file foo into file
bar and fiemap confirms there's no shared flag (0x2000).

So update send_write_or_clone() so that it proceeds with cloning if the
source and destination ranges end at the i_size of the respective files.

After this changes the result of the test is:

  (...)
  mkfile o258-7-0
  rename o258-7-0 -> bar
  clone bar - source=foo source offset=0 offset=0 length=1048581
  chown bar - uid=0, gid=0
  chmod bar - mode=0644
  utimes bar
  utimes
  BTRFS_IOC_SET_RECEIVED_SUBVOL uuid=582420f3-ea7d-564e-bbe5-ce440d622190, stransid=7
  /mnt/sdi/snap/bar:
   EXT: FILE-OFFSET      BLOCK-RANGE      TOTAL FLAGS
     0: [0..2055]:       26624..28679      2056 0x2001

A test case for fstests will also follow up soon.

Link: https://github.com/kdave/btrfs-progs/issues/572#issuecomment-2282841416
CC: stable@vger.kernel.org # 5.10+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Currently the extent map shrinker can be run by any task when attempting
to allocate memory and there's enough memory pressure to trigger it.

To avoid too much latency we stop iterating over extent maps and removing
them once the task needs to reschedule. This logic was introduced in commit
b3ebb9b7 ("btrfs: stop extent map shrinker if reschedule is needed").

While that solved high latency problems for some use cases, it's still
not enough because with a too high number of tasks entering the extent map
shrinker code, either due to memory allocations or because they are a
kswapd task, we end up having a very high level of contention on some
spin locks, namely:

1) The fs_info->fs_roots_radix_lock spin lock, which we need to find
   roots to iterate over their inodes;

2) The spin lock of the xarray used to track open inodes for a root
   (struct btrfs_root::inodes) - on 6.10 kernels and below, it used to
   be a red black tree and the spin lock was root->inode_lock;

3) The fs_info->delayed_iput_lock spin lock since the shrinker adds
   delayed iputs (calls btrfs_add_delayed_iput()).

Instead of allowing the extent map shrinker to be run by any task, make
it run only by kswapd tasks. This still solves the problem of running
into OOM situations due to an unbounded extent map creation, which is
simple to trigger by direct IO writes, as described in the changelog
of commit 956a17d9 ("btrfs: add a shrinker for extent maps"), and
by a similar case when doing buffered IO on files with a very large
number of holes (keeping the file open and creating many holes, whose
extent maps are only released when the file is closed).
Reported-by: kzd <kzd@56709.net>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=219121Reported-by: Octavia Togami <octavia.togami@gmail.com>
Link: https://lore.kernel.org/linux-btrfs/CAHPNGSSt-a4ZZWrtJdVyYnJFscFjP9S7rMcvEMaNSpR556DdLA@mail.gmail.com/
Fixes: 956a17d9 ("btrfs: add a shrinker for extent maps")
CC: stable@vger.kernel.org # 6.10+
Tested-by: kzd <kzd@56709.net>
Tested-by: Octavia Togami <octavia.togami@gmail.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

[REPORT]
There is a bug report that kernel is rejecting a mismatching inode mode
and its dir item:

  [ 1881.553937] BTRFS critical (device dm-0): inode mode mismatch with
  dir: inode mode=040700 btrfs type=2 dir type=0

[CAUSE]
It looks like the inode mode is correct, while the dir item type
0 is BTRFS_FT_UNKNOWN, which should not be generated by btrfs at all.

This may be caused by a memory bit flip.

[ENHANCEMENT]
Although tree-checker is not able to do any cross-leaf verification, for
this particular case we can at least reject any dir type with
BTRFS_FT_UNKNOWN.

So here we enhance the dir type check from [0, BTRFS_FT_MAX), to
(0, BTRFS_FT_MAX).
Although the existing corruption can not be fixed just by such enhanced
checking, it should prevent the same 0x2->0x0 bitflip for dir type to
reach disk in the future.
Reported-by: Kota <nospam@kota.moe>
Link: https://lore.kernel.org/linux-btrfs/CACsxjPYnQF9ZF-0OhH16dAx50=BXXOcP74MxBc3BG+xae4vTTw@mail.gmail.com/
CC: stable@vger.kernel.org # 5.4+
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

In the patch 78c52d9e ("btrfs: check for refs on snapshot delete
resume") I added some code to handle file systems that had been
corrupted by a bug that incorrectly skipped updating the drop progress
key while dropping a snapshot.  This code would check to see if we had
already deleted our reference for a child block, and skip the deletion
if we had already.

Unfortunately there is a bug, as the check would only check the on-disk
references.  I made an incorrect assumption that blocks in an already
deleted snapshot that was having the deletion resume on mount wouldn't
be modified.

If we have 2 pending deleted snapshots that share blocks, we can easily
modify the rules for a block.  Take the following example

subvolume a exists, and subvolume b is a snapshot of subvolume a.  They
share references to block 1.  Block 1 will have 2 full references, one
for subvolume a and one for subvolume b, and it belongs to subvolume a
(btrfs_header_owner(block 1) == subvolume a).

When deleting subvolume a, we will drop our full reference for block 1,
and because we are the owner we will drop our full reference for all of
block 1's children, convert block 1 to FULL BACKREF, and add a shared
reference to all of block 1's children.

Then we will start the snapshot deletion of subvolume b.  We look up the
extent info for block 1, which checks delayed refs and tells us that
FULL BACKREF is set, so sets parent to the bytenr of block 1.  However
because this is a resumed snapshot deletion, we call into
check_ref_exists().  Because check_ref_exists() only looks at the disk,
it doesn't find the shared backref for the child of block 1, and thus
returns 0 and we skip deleting the reference for the child of block 1
and continue.  This orphans the child of block 1.

The fix is to lookup the delayed refs, similar to what we do in
btrfs_lookup_extent_info().  However we only care about whether the
reference exists or not.  If we fail to find our reference on disk, go
look up the bytenr in the delayed refs, and if it exists look for an
existing ref in the delayed ref head.  If that exists then we know we
can delete the reference safely and carry on.  If it doesn't exist we
know we have to skip over this block.

This bug has existed since I introduced this fix, however requires
having multiple deleted snapshots pending when we unmount.  We noticed
this in production because our shutdown path stops the container on the
system, which deletes a bunch of subvolumes, and then reboots the box.
This gives us plenty of opportunities to hit this issue.  Looking at the
history we've seen this occasionally in production, but we had a big
spike recently thanks to faster machines getting jobs with multiple
subvolumes in the job.

Chris Mason wrote a reproducer which does the following

mount /dev/nvme4n1 /btrfs
btrfs subvol create /btrfs/s1
simoop -E -f 4k -n 200000 -z /btrfs/s1
while(true) ; do
	btrfs subvol snap /btrfs/s1 /btrfs/s2
	simoop -f 4k -n 200000 -r 10 -z /btrfs/s2
	btrfs subvol snap /btrfs/s2 /btrfs/s3
	btrfs balance start -dusage=80 /btrfs
	btrfs subvol del /btrfs/s2 /btrfs/s3
	umount /btrfs
	btrfsck /dev/nvme4n1 || exit 1
	mount /dev/nvme4n1 /btrfs
done

On the second loop this would fail consistently, with my patch it has
been running for hours and hasn't failed.

I also used dm-log-writes to capture the state of the failure so I could
debug the problem.  Using the existing failure case to test my patch
validated that it fixes the problem.

Fixes: 78c52d9e ("btrfs: check for refs on snapshot delete resume")
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Pull x86 fixes from Thomas Gleixner:

 - Fix 32-bit PTI for real.

   pti_clone_entry_text() is called twice, once before initcalls so that
   initcalls can use the user-mode helper and then again after text is
   set read only. Setting read only on 32-bit might break up the PMD
   mapping, which makes the second invocation of pti_clone_entry_text()
   find the mappings out of sync and failing.

   Allow the second call to split the existing PMDs in the user mapping
   and synchronize with the kernel mapping.

 - Don't make acpi_mp_wake_mailbox read-only after init as the mail box
   must be writable in the case that CPU hotplug operations happen after
   boot. Otherwise the attempt to start a CPU crashes with a write to
   read only memory.

 - Add a missing sanity check in mtrr_save_state() to ensure that the
   fixed MTRR MSRs are supported.

   Otherwise mtrr_save_state() ends up in a #GP, which is fixed up, but
   the WARN_ON() can bring systems down when panic on warn is set.

* tag 'x86-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mtrr: Check if fixed MTRRs exist before saving them
  x86/paravirt: Fix incorrect virt spinlock setting on bare metal
  x86/acpi: Remove __ro_after_init from acpi_mp_wake_mailbox
  x86/mm: Fix PTI for i386 some more

Pull time keeping fixes from Thomas Gleixner:

 - Fix a couple of issues in the NTP code where user supplied values are
   neither sanity checked nor clamped to the operating range. This
   results in integer overflows and eventualy NTP getting out of sync.

   According to the history the sanity checks had been removed in favor
   of clamping the values, but the clamping never worked correctly under
   all circumstances. The NTP people asked to not bring the sanity
   checks back as it might break existing applications.

   Make the clamping work correctly and add it where it's missing

 - If adjtimex() sets the clock it has to trigger the hrtimer subsystem
   so it can adjust and if the clock was set into the future expire
   timers if needed. The caller should provide a bitmask to tell
   hrtimers which clocks have been adjusted.

   adjtimex() uses not the proper constant and uses CLOCK_REALTIME
   instead, which is 0. So hrtimers adjusts only the clocks, but does
   not check for expired timers, which might make them expire really
   late. Use the proper bitmask constant instead.

* tag 'timers-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timekeeping: Fix bogus clock_was_set() invocation in do_adjtimex()
  ntp: Safeguard against time_constant overflow
  ntp: Clamp maxerror and esterror to operating range

Pull irq fixes from Thomas Gleixner:
 "Three small fixes for interrupt core and drivers:

   - The interrupt core fails to honor caller supplied affinity hints
     for non-managed interrupts and uses the system default affinity on
     startup instead. Set the missing flag in the descriptor to tell the
     core to use the provided affinity.

   - Fix a shift out of bounds error in the Xilinx driver

   - Handle switching to level trigger correctly in the RISCV APLIC
     driver. It failed to retrigger the interrupt which causes it to
     become stale"

* tag 'irq-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/riscv-aplic: Retrigger MSI interrupt on source configuration
  irqchip/xilinx: Fix shift out of bounds
  genirq/irqdesc: Honor caller provided affinity in alloc_desc()

Pull USB fixes from Greg KH:
 "Here are a number of small USB driver fixes for reported issues for
  6.11-rc3. Included in here are:

   - usb serial driver MODULE_DESCRIPTION() updates

   - usb serial driver fixes

   - typec driver fixes

   - usb-ip driver fix

   - gadget driver fixes

   - dt binding update

  All of these have been in linux-next with no reported issues"

* tag 'usb-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: typec: ucsi: Fix a deadlock in ucsi_send_command_common()
  usb: typec: tcpm: avoid sink goto SNK_UNATTACHED state if not received source capability message
  usb: gadget: f_fs: pull out f->disable() from ffs_func_set_alt()
  usb: gadget: f_fs: restore ffs_func_disable() functionality
  USB: serial: debug: do not echo input by default
  usb: typec: tipd: Delete extra semi-colon
  usb: typec: tipd: Fix dereferencing freeing memory in tps6598x_apply_patch()
  usb: gadget: u_serial: Set start_delayed during suspend
  usb: typec: tcpci: Fix error code in tcpci_check_std_output_cap()
  usb: typec: fsa4480: Check if the chip is really there
  usb: gadget: core: Check for unset descriptor
  usb: vhci-hcd: Do not drop references before new references are gained
  usb: gadget: u_audio: Check return codes from usb_ep_enable and config_ep_by_speed.
  usb: gadget: midi2: Fix the response for FB info with block 0xff
  dt-bindings: usb: microchip,usb2514: Add USB2517 compatible
  USB: serial: garmin_gps: use struct_size() to allocate pkt
  USB: serial: garmin_gps: annotate struct garmin_packet with __counted_by
  USB: serial: add missing MODULE_DESCRIPTION() macros
  USB: serial: spcp8x5: remove unused struct 'spcp8x5_usb_ctrl_arg'

Pull tty / serial driver fixes from Greg KH:
 "Here are some small tty and serial driver fixes for reported problems
  for 6.11-rc3. Included in here are:

   - sc16is7xx serial driver fixes

   - uartclk bugfix for a divide by zero issue

   - conmakehash userspace build issue fix

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: vt: conmakehash: cope with abs_srctree no longer in env
  serial: sc16is7xx: fix invalid FIFO access with special register set
  serial: sc16is7xx: fix TX fifo corruption
  serial: core: check uartclk for zero to avoid divide by zero

Merge tag 'driver-core-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core / documentation fixes from Greg KH:
 "Here are some small fixes, and some documentation updates for
  6.11-rc3. Included in here are:

   - embargoed hardware documenation updates based on a lot of review by
     legal-types in lots of companies to try to make the process a _bit_
     easier for us to manage over time.

   - rust firmware documentation fix

   - driver detach race fix for the fix that went into 6.11-rc1

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'driver-core-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  driver core: Fix uevent_show() vs driver detach race
  Documentation: embargoed-hardware-issues.rst: add a section documenting the "early access" process
  Documentation: embargoed-hardware-issues.rst: minor cleanups and fixes
  rust: firmware: fix invalid rustdoc link

Pull char/misc fixes from Greg KH:
 "Here are some small char/misc/other driver fixes for 6.11-rc3 for
  reported issues. Included in here are:

   - binder driver fixes

   - fsi MODULE_DESCRIPTION() additions (people seem to love them...)

   - eeprom driver fix

   - Kconfig dependency fix to resolve build issues

   - spmi driver fixes

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'char-misc-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  spmi: pmic-arb: add missing newline in dev_err format strings
  spmi: pmic-arb: Pass the correct of_node to irq_domain_add_tree
  binder_alloc: Fix sleeping function called from invalid context
  binder: fix descriptor lookup for context manager
  char: add missing NetWinder MODULE_DESCRIPTION() macros
  misc: mrvl-cn10k-dpi: add PCI_IOV dependency
  eeprom: ee1004: Fix locking issues in ee1004_probe()
  fsi: add missing MODULE_DESCRIPTION() macros

Pull SCSI fixes from James Bottomley:
 "Two core fixes: one to prevent discard type changes (seen on iSCSI)
  during intermittent errors and the other is fixing a lockdep problem
  caused by the queue limits change.

  And one driver fix in ufs"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sd: Keep the discard mode stable
  scsi: sd: Move sd_read_cpr() out of the q->limits_lock region
  scsi: ufs: core: Fix hba->last_dme_cmd_tstamp timestamp updating logic

Pull nfsd fixes from Chuck Lever:

 - Two minor fixes for recent changes

* tag 'nfsd-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: don't set SVC_SOCK_ANONYMOUS when creating nfsd sockets
  sunrpc: avoid -Wformat-security warning

Pull i2c fixes from Wolfram Sang:

 - Two fixes for SMBusAlert handling in the I2C core: one to avoid an
   endless loop when scanning for handlers and one to make sure handlers
   are always called even if HW has broken behaviour

 - I2C header build fix for when ACPI is enabled but I2C isn't

 - The testunit gets a rename in the code to match the documentation

 - Two fixes for the Qualcomm GENI I2C controller are cleaning up the
   error exit patch in the runtime_resume() function. The first is
   disabling the clock, the second disables the icc on the way out

* tag 'i2c-for-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: testunit: match HostNotify test name with docs
  i2c: qcom-geni: Add missing geni_icc_disable in geni_i2c_runtime_resume
  i2c: qcom-geni: Add missing clk_disable_unprepare in geni_i2c_runtime_resume
  i2c: Fix conditional for substituting empty ACPI functions
  i2c: smbus: Send alert notifications to all devices if source not found
  i2c: smbus: Improve handling of stuck alerts

Pull dma-mapping fix from Christoph Hellwig:

 - avoid a deadlock with dma-debug and netconsole (Rik van Riel)

* tag 'dma-mapping-6.11-2024-08-10' of git://git.infradead.org/users/hch/dma-mapping:
  dma-debug: avoid deadlock between dma debug vs printk and netconsole

Pull more bcachefs fixes from Kent Overstreet:
 "A couple last minute fixes for the new disk accounting

   - fix a bug that was causing ACLs to seemingly "disappear"

   - new on disk format version, bcachefs_metadata_version_disk_accounting_v3

     bcachefs_metadata_version_disk_accounting_v2 accidentally included
     padding in disk_accounting_key; fortunately, 6.11 isn't out yet so
     we can fix this with another version bump"

* tag 'bcachefs-2024-08-10' of git://evilpiepirate.org/bcachefs:
  bcachefs: bcachefs_metadata_version_disk_accounting_v3
  bcachefs: improve bch2_dev_usage_to_text()
  bcachefs: bch2_accounting_invalid()
  bcachefs: Switch to .get_inode_acl()

The section 4.5.2 of the RISC-V AIA specification says that "any write
to a sourcecfg register of an APLIC might (or might not) cause the
corresponding interrupt-pending bit to be set to one if the rectified
input value is high (= 1) under the new source mode."

When the interrupt type is changed in the sourcecfg register, the APLIC
device might not set the corresponding pending bit, so the interrupt might
never become pending.

To handle sourcecfg register changes for level-triggered interrupts in MSI
mode, manually set the pending bit for retriggering interrupt so it gets
retriggered if it was already asserted.

Fixes: ca8df97f ("irqchip/riscv-aplic: Add support for MSI-mode")
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20240809071049.2454-1-yongxuan.wang@sifive.com

The device tree property 'xlnx,kind-of-intr' is sanity checked that the
bitmask contains only set bits which are in the range of the number of
interrupts supported by the controller.

The check is done by shifting the mask right by the number of supported
interrupts and checking the result for zero.

The data type of the mask is u32 and the number of supported interrupts is
up to 32. In case of 32 interrupts the shift is out of bounds, resulting in
a mismatch warning. The out of bounds condition is also reported by UBSAN:

  UBSAN: shift-out-of-bounds in irq-xilinx-intc.c:332:22
  shift exponent 32 is too large for 32-bit type 'unsigned int'

Fix it by promoting the mask to u64 for the test.

Fixes: d50466c9 ("microblaze: intc: Refactor DT sanity check")
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/1723186944-3571957-1-git-send-email-radhey.shyam.pandey@amd.com

Pull smb client fixes from Steve French:

 - DFS fix

 - fix for security flags for requiring encryption

 - minor cleanup

* tag '6.11-rc2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: cifs_inval_name_dfs_link_error: correct the check for fullpath
  Fix spelling errors in Server Message Block
  smb3: fix setting SecurityFlags when encryption is required

Pull spi fixes from Mark Brown:
 "A few SPI fixes: clock rate calculation fixes for the Kunpeng and lpsi
  drivers and a missing registration of a device ID for spidev (which
  had only been updated for DT cases, causing warnings)"

* tag 'spi-fix-v6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spi-fsl-lpspi: Fix scldiv calculation
  spi: spidev: Add missing spi_device_id for bh2228fv
  spi: hisi-kunpeng: Add verification for the max_frequency provided by the firmware
  spi: hisi-kunpeng: Add validation for the minimum value of speed_hz

bcachefs_metadata_version_disk_accounting_v2 erroneously had padding
bytes in disk_accounting_key, which is a problem because we have to
guarantee that all unused bytes in disk_accounting_key are zeroed.

Fortunately 6.11 isn't out yet, so it's cheap to fix this by spinning a
new version.
Reported-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Pull drm fixes from Dave Airlie:
 "Weekly regular fixes, mostly amdgpu with i915/xe having a few each,
  and then some misc bits across the board, seems about right for rc3
  time.

  client:
   - fix null ptr deref

  bridge:
   - connector: fix double free

  atomic:
   - fix async flip update

  panel:
   - document panel

  omap:
   - add config dependency

  tests:
   - fix gem shmem test

  drm buddy:
   - Add start address to trim function

  amdgpu:
   - DMCUB fix
   - Fix DET programming on some DCNs
   - DCC fixes
   - DCN 4.0.1 fixes
   - SMU 14.0.x update
   - MMHUB fix
   - DCN 3.1.4 fix
   - GC 12.0 fixes
   - Fix soft recovery error propogation
   - SDMA 7.0 fixes
   - DSC fix

  xe:
   - Fix off-by-one when processing RTP rules
   - Use dma_fence_chain_free in chain fence unused as a sync
   - Fix PL1 disable flow in xe_hwmon_power_max_write
   - Take ref to VM in delayed dump snapshot

  i915:
   - correct dual pps handling for MTL_PCH+ [display]
   - Adjust vma offset for framebuffer mmap offset [gem]
   - Fix Virtual Memory mapping boundaries calculation [gem]
   - Allow evicting to use the requested placement
   - Attempt to get pages without eviction first"

* tag 'drm-fixes-2024-08-10' of https://gitlab.freedesktop.org/drm/kernel: (31 commits)
  drm/xe: Take ref to VM in delayed snapshot
  drm/xe/hwmon: Fix PL1 disable flow in xe_hwmon_power_max_write
  drm/xe: Use dma_fence_chain_free in chain fence unused as a sync
  drm/xe/rtp: Fix off-by-one when processing rules
  drm/amdgpu: Add DCC GFX12 flag to enable address alignment
  drm/amdgpu: correct sdma7 max dw
  drm/amdgpu: Add address alignment support to DCC buffers
  drm/amd/display: Skip Recompute DSC Params if no Stream on Link
  drm/amdgpu: change non-dcc buffer copy configuration
  drm/amdgpu: Forward soft recovery errors to userspace
  drm/amdgpu: add golden setting for gc v12
  drm/buddy: Add start address support to trim function
  drm/amd/display: Add missing program DET segment call to pipe init
  drm/amd/display: Add missing DCN314 to the DML Makefile
  drm/amdgpu: force to use legacy inv in mmhub
  drm/amd/pm: update powerplay structure on smu v14.0.2/3
  drm/amd/display: Add missing mcache registers
  drm/amd/display: Add dcc propagation value
  drm/amd/display: Add missing DET segments programming
  drm/amd/display: Replace dm_execute_dmub_cmd with dc_wake_and_execute_dmub_cmd
  ...

Add a line for capacity
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Implement bch2_accounting_invalid(); check for junk at the end, and
replicas accounting entries in particular need to be checked or we'll
pop asserts later.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Pull cpumask fix from Yury Norov:
 "Fix for cpumask merge"

[ Mea culpa, this was my mismerge due to too much cut-and-paste - Linus ]

* tag 'bitmap-6.11-rc' of https://github.com/norov/linux:
  cpumask: Fix crash on updating CPU enabled mask

Pull power management fix from Rafael Wysocki:
 "Change the default EPP (energy-performence preference) value for the
  Emerald Rapids processor in the intel_pstate driver.

  Thisshould improve both the performance and energy efficiency (Pedro
  Henrique Kopper)"

* tag 'pm-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: intel_pstate: Update Balance performance EPP for Emerald Rapids

Merge tag 'asm-generic-fixes-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic fixes from Arnd Bergmann:
 "There are two more changes to the syscall.tbl conversion: the
  '__NR_newfstat' in the previous bugfix was a mistake and gets reverted
  now, after triple-checking that the contents are now back to what they
  were on all architectures. The __NR_nfsservctl definition is not
  really needed but came up in the same discussion as it had previously
  been defined in uapi/asm-generic/unistd.h and tested for in user
  space.

  There are a few more symbols that used to be defined in the old
  unistd.h file, but that are never defined on any other architecture
  using syscall.tbl format. These used to be needed inside of the
  kernel:

     __NR_syscalls
     __NR_arch_specific_syscall
     __NR3264_*

  Searching for these on https://codesearch.debian.net/ shows a few
  packages (rustc, golang, clamav, libseccomp, librsvg, strace) that
  duplicate all the macros from asm/unistd.h, but nothing that actually
  uses the macros, so I concluded that they are fine to omit after all"

* tag 'asm-generic-fixes-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  syscalls: add back legacy __NR_nfsservctl macro
  syscalls: fix fstat() entry again

Pull ARM SoC fixes from Arnd Bergmann:
 "There are three sets of patches for the soc tree:

   - Marek Behún addresses multiple build time regressions caused by
     changes to the cznic turris-omnia support

   - Dmitry Torokhov fixes a regression in the legacy "gumstix" board
     code he cleaned up earlier

   - The TI K3 maintainers found multiple bugs in the in gpio, audio and
     pcie devicetree nodes"

* tag 'arm-fixes-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: pxa/gumstix: fix attaching properties to vbus gpio device
  doc: platform: cznic: turris-omnia-mcu: Use double backticks for attribute value
  doc: platform: cznic: turris-omnia-mcu: Fix sphinx-build warning
  platform: cznic: turris-omnia-mcu: Make GPIO code optional
  platform: cznic: turris-omnia-mcu: Make poweroff and wakeup code optional
  platform: cznic: turris-omnia-mcu: Make TRNG code optional
  platform: cznic: turris-omnia-mcu: Make watchdog code optional
  arm64: dts: ti: k3-j784s4-main: Correct McASP DMAs
  arm64: dts: ti: k3-j722s: Fix gpio-range for main_pmx0
  arm64: dts: ti: k3-am62p: Fix gpio-range for main_pmx0
  arm64: dts: ti: k3-am62p: Add gpio-ranges for mcu_gpio0
  arm64: dts: ti: k3-am62-verdin-dahlia: Keep CTRL_SLEEP_MOCI# regulator on
  arm64: dts: ti: k3-j784s4-evm: Consolidate serdes0 references
  arm64: dts: ti: k3-j784s4-evm: Assign only lanes 0 and 1 to PCIe1

Merge tag 'probes-fixes-v6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull kprobe fixes from Masami Hiramatsu:

 - Fix misusing str_has_prefix() parameter order to check symbol prefix
   correctly

 - bpf: remove unused declaring of bpf_kprobe_override

* tag 'probes-fixes-v6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  kprobes: Fix to check symbol prefixes correctly
  bpf: kprobe: remove unused declaring of bpf_kprobe_override

Pull block fixes from Jens Axboe:
 "Just a set of cleanups for blk-throttle and nvme structures"

* tag 'block-6.11-20240809' of git://git.kernel.dk/linux:
  nvme: reorganize nvme_ns_head fields
  nvme: change data type of lba_shift
  nvme: remove a field from nvme_ns_head
  nvme: remove unused parameter
  blk-throttle: remove more latency dead-code

Pull io_uring fixes from Jens Axboe:
 "Nothing major in here, just two fixes for ensuring that bundle
  recv/send requests always get marked for cleanups, and a single fix to
  ensure that sends with provided buffers only pick a single buffer
  unless the bundle option has been enabled"

* tag 'io_uring-6.11-20240809' of git://git.kernel.dk/linux:
  io_uring/net: don't pick multiple buffers for non-bundle send
  io_uring/net: ensure expanded bundle send gets marked for cleanup
  io_uring/net: ensure expanded bundle recv gets marked for cleanup

Pull sound fixes from Takashi Iwai:
 "A collection of lots of small changes, almost all device-specific:

   - A series of fixes for ASoC Qualcomm stuff

   - Various fixes for Cirrus ASoC and HD-audio codecs

   - A few AMD ASoC quirks and usual HD-audio quirks

   - Other misc fixes, including a long-time regression in USB-audio"

* tag 'sound-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (39 commits)
  ASoC: cs35l56: Patch CS35L56_IRQ1_MASK_18 to the default value
  ASoC: meson: axg-fifo: fix irq scheduling issue with PREEMPT_RT
  MAINTAINERS: Update Cirrus Logic parts to linux-sound mailing list
  ASoC: dt-bindings: qcom,wcd939x: Correct reset GPIO polarity in example
  ASoC: dt-bindings: qcom,wcd938x: Correct reset GPIO polarity in example
  ASoC: dt-bindings: qcom,wcd934x: Correct reset GPIO polarity in example
  ASoC: dt-bindings: qcom,wcd937x: Correct reset GPIO polarity in example
  ASoC: amd: yc: Add quirk entry for OMEN by HP Gaming Laptop 16-n0xxx
  ASoC: codecs: ES8326: button detect issue
  ASoC: amd: yc: Support mic on Lenovo Thinkpad E14 Gen 6
  ALSA: usb-audio: Re-add ScratchAmp quirk entries
  ALSA: hda/realtek: Add Framework Laptop 13 (Intel Core Ultra) to quirks
  ALSA: hda/hdmi: Yet more pin fix for HP EliteDesk 800 G4
  ALSA: hda: Add HP MP9 G4 Retail System AMS to force connect list
  ASoC: cs35l56: Handle OTP read latency over SoundWire
  ASoC: codecs: lpass-macro: fix missing codec version
  ALSA: line6: Fix racy access to midibuf
  ASoC: cs-amp-lib: Fix NULL pointer crash if efi.get_variable is NULL
  ASoC: cs35l56: Stop creating ALSA controls for firmware coefficients
  ASoC: wm_adsp: Add control_add callback and export wm_adsp_control_add()
  ...

The recursive aes-arm-bs module load situation reported by Russell King
is getting fixed in the crypto layer, but this in the meantime fixes the
"recursive load hangs forever" by just making the waiting for the first
module load be interruptible.

This should now match the old behavior before commit 9b9879fc
("modules: catch concurrent module loads, treat them as idempotent"),
which used the different "wait for module to be ready" code in
module_patient_check_exists().

End result: a recursive module load will still block, but now a signal
will interrupt it and fail the second module load, at which point the
first module will successfully complete loading.

Fixes: 9b9879fc ("modules: catch concurrent module loads, treat them as idempotent")
Cc: Russell King <linux@armlinux.org.uk>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>