CVE-2021-47498

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7b17c2f7292ba1f3f98dae3f7077f9e569653276 < 8050652810bf38241edec8717393d2446e8036f1affected
LinuxLinux7b17c2f7292ba1f3f98dae3f7077f9e569653276 < 8ca9745efe3528feb06ca4e117188038eea2d351affected
LinuxLinux7b17c2f7292ba1f3f98dae3f7077f9e569653276 < b4459b11e84092658fa195a2587aff3b9637f0e7affected
LinuxLinux4.10affected
LinuxLinux0 < 4.10unaffected
LinuxLinux5.10.241 <= 5.10.*unaffected
LinuxLinux5.14.14 <= 5.14.*unaffected
LinuxLinux5.15 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References