CVE-2022-49033

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < 89840b12c8fad7200eb6478525c13261512c01be; >= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < 3c98e91be6aea4c7acf09da6eb0c107ea9186bb5; >= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < f4b930a1602b05e77fee31f9616599b25e910a86; >= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < 8eb912af525042a7365295eb62f6d5270c2a6462; >= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < 01d7c41eac9129fba80d8aed0060caab4a7dbe09; >= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < 044da1a371a0da579e805e89c96865f62d8f6f69; >= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < 588ae4fdd8b11788a797776b10d6c44ae12bc133; >= e8c8541ac379709db8d2339e1cb720469fc2cd8f, < f7e942b5bb35d8e3af54053d19a6bf04143a3955
LinuxLinux4.1

References

Timeline

Published
Oct 21, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2022-49033: Medium severity, CVSS 5.5 | Vulnix