CVE-2022-49033

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < 89840b12c8fad7200eb6478525c13261512c01beaffected
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < 3c98e91be6aea4c7acf09da6eb0c107ea9186bb5affected
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < f4b930a1602b05e77fee31f9616599b25e910a86affected
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < 8eb912af525042a7365295eb62f6d5270c2a6462affected
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < 01d7c41eac9129fba80d8aed0060caab4a7dbe09affected
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < 044da1a371a0da579e805e89c96865f62d8f6f69affected
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < 588ae4fdd8b11788a797776b10d6c44ae12bc133affected
LinuxLinuxe8c8541ac379709db8d2339e1cb720469fc2cd8f < f7e942b5bb35d8e3af54053d19a6bf04143a3955affected
LinuxLinux4.1affected
LinuxLinux0 < 4.1unaffected
LinuxLinux4.9.335 <= 4.9.*unaffected
LinuxLinux4.14.301 <= 4.14.*unaffected
LinuxLinux4.19.268 <= 4.19.*unaffected
LinuxLinux5.4.226 <= 5.4.*unaffected
LinuxLinux5.10.158 <= 5.10.*unaffected
LinuxLinux5.15.82 <= 5.15.*unaffected
LinuxLinux6.0.12 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References