Riskcovery

CVE-2022-49849

btrfs: fix match incorrectly in dev_args_match_device

State
Published
Severity
Not scored
Published
May 1, 2025
Updated
May 23, 2026
Reserved
May 1, 2025

Read the record on cve.org

Description

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

btrfs: fix match incorrectly in dev_args_match_device

syzkaller found a failed assertion:

assertion failed: (args->devid != (u64)-1) || args->missing, in fs/btrfs/volumes.c:6921

This can be triggered when we set devid to (u64)-1 by ioctl. In this case, the match of devid will be skipped and the match of device may succeed incorrectly.

Patch 562d7b1512f7 introduced this function which is used to match device. This function contains two matching scenarios, we can distinguish them by checking the value of args->missing rather than check whether args->devid and args->uuid is default value.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 5578b681fbf2b22d61189a2539efd3009518b328 to before c9fe4719c662e0af17eea723cf345e37719fd3c9Affected
  • 562d7b1512f7369a19bca2883e2e8672d78f0481 to before bc6c127c377010f136360552ebf91c2723081c1bAffected
  • 562d7b1512f7369a19bca2883e2e8672d78f0481 to before 0fca385d6ebc3cabb20f67bcf8a71f1448bdc001Affected
  • 5.15.54 to before 5.15.79Affected
LinuxLinux
  • 5.16Affected
  • before 5.16Not affected
  • 5.15.79 through 5.15.*Not affected
  • 6.0.9 through 6.0.*Not affected
  • 6.1 and laterNot affected

References

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