Riskcovery

CVE-2021-47498

dm rq: don't queue request to blk-mq during DM suspend

State
Published
Severity
5.5 Medium
Published
May 22, 2024
Updated
May 11, 2026
Reserved
May 22, 2024

Read the record on cve.org

Description

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

dm rq: don't queue request to blk-mq during DM suspend

DM uses blk-mq's quiesce/unquiesce to stop/start device mapper queue.

But blk-mq's unquiesce may come from outside events, such as elevator switch, updating nr_requests or others, and request may come during suspend, so simply ask for blk-mq to requeue it.

Fixes one kernel panic issue when running updating nr_requests and dm-mpath suspend/resume stress test.

Scores

CVSSScoreVectorSource
3.15.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCISA-ADP

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 7b17c2f7292ba1f3f98dae3f7077f9e569653276 to before 8050652810bf38241edec8717393d2446e8036f1Affected
  • 7b17c2f7292ba1f3f98dae3f7077f9e569653276 to before 8ca9745efe3528feb06ca4e117188038eea2d351Affected
  • 7b17c2f7292ba1f3f98dae3f7077f9e569653276 to before b4459b11e84092658fa195a2587aff3b9637f0e7Affected
LinuxLinux
  • 4.10Affected
  • before 4.10Not affected
  • 5.10.241 through 5.10.*Not affected
  • 5.14.14 through 5.14.*Not affected
  • 5.15 and laterNot affected

References

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