In the Linux kernel, the following vulnerability has been resolved:

btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit()

Syzkaller reported BUG as follows:

  BUG: sleeping function called from invalid context at
       include/linux/sched/mm.h:274
  Call Trace:
   <TASK>
   dump_stack_lvl+0xcd/0x134
   __might_resched.cold+0x222/0x26b
   kmem_cache_alloc+0x2e7/0x3c0
   update_qgroup_limit_item+0xe1/0x390
   btrfs_qgroup_inherit+0x147b/0x1ee0
   create_subvol+0x4eb/0x1710
   btrfs_mksubvol+0xfe5/0x13f0
   __btrfs_ioctl_snap_create+0x2b0/0x430
   btrfs_ioctl_snap_create_v2+0x25a/0x520
   btrfs_ioctl+0x2a1c/0x5ce0
   __x64_sys_ioctl+0x193/0x200
   do_syscall_64+0x35/0x80

Fix this by calling qgroup_dirty() on @dstqgroup, and update limit item in
btrfs_run_qgroups() later outside of the spinlock context.

kernel.org https://git.kernel.org/stable/c/01d7c41eac9129fba80d8aed0060caab4a7dbe09 [No types assigned]

kernel.org https://git.kernel.org/stable/c/044da1a371a0da579e805e89c96865f62d8f6f69 [No types assigned]

kernel.org https://git.kernel.org/stable/c/3c98e91be6aea4c7acf09da6eb0c107ea9186bb5 [No types assigned]

kernel.org https://git.kernel.org/stable/c/588ae4fdd8b11788a797776b10d6c44ae12bc133 [No types assigned]

kernel.org https://git.kernel.org/stable/c/89840b12c8fad7200eb6478525c13261512c01be [No types assigned]

kernel.org https://git.kernel.org/stable/c/8eb912af525042a7365295eb62f6d5270c2a6462 [No types assigned]

kernel.org https://git.kernel.org/stable/c/f4b930a1602b05e77fee31f9616599b25e910a86 [No types assigned]

kernel.org https://git.kernel.org/stable/c/f7e942b5bb35d8e3af54053d19a6bf04143a3955 [No types assigned]