CVE-2022-49033

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

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.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.04%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/89840b12c8fad7200eb6478525c13261512c01be	patch
https://git.kernel.org/stable/c/3c98e91be6aea4c7acf09da6eb0c107ea9186bb5	patch
https://git.kernel.org/stable/c/f4b930a1602b05e77fee31f9616599b25e910a86	patch
https://git.kernel.org/stable/c/8eb912af525042a7365295eb62f6d5270c2a6462	patch
https://git.kernel.org/stable/c/01d7c41eac9129fba80d8aed0060caab4a7dbe09	patch
https://git.kernel.org/stable/c/044da1a371a0da579e805e89c96865f62d8f6f69	patch
https://git.kernel.org/stable/c/588ae4fdd8b11788a797776b10d6c44ae12bc133	patch
https://git.kernel.org/stable/c/f7e942b5bb35d8e3af54053d19a6bf04143a3955	patch

Frequently Asked Questions

What is the severity of CVE-2022-49033?: CVE-2022-49033 has been scored as a medium severity vulnerability.
How to fix CVE-2022-49033?: To fix CVE-2022-49033, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49033 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49033 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49033?: CVE-2022-49033 affects Linux Linux, Linux Linux.