Riskcovery

CVE-2024-38543

lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure

State
Published
Severity
Not scored
Published
Jun 19, 2024
Updated
May 11, 2026
Reserved
Jun 18, 2024

Read the record on cve.org

Description

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

lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure

The kcalloc() in dmirror_device_evict_chunk() will return null if the physical memory has run out. As a result, if src_pfns or dst_pfns is dereferenced, the null pointer dereference bug will happen.

Moreover, the device is going away. If the kcalloc() fails, the pages mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in kcalloc().

Finally, as there is no need to have physically contiguous memory, Switch kcalloc() to kvcalloc() in order to avoid failing allocations.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • b2ef9f5a5cb37643ca5def3516c546457074b882 to before 1a21fdeea502658e315bd939409b755974f4fb64Affected
  • b2ef9f5a5cb37643ca5def3516c546457074b882 to before 65e528a69cb3ed4a286c45b4afba57461c8b5b33Affected
  • b2ef9f5a5cb37643ca5def3516c546457074b882 to before ce47e8ead9a72834cc68431d53f8092ce69bebb7Affected
  • b2ef9f5a5cb37643ca5def3516c546457074b882 to before 3b20d18f475bd17309db640dbe7d7c7ebb5bc2bcAffected
  • b2ef9f5a5cb37643ca5def3516c546457074b882 to before c2af060d1c18beaec56351cf9c9bcbbc5af341a3Affected
LinuxLinux
  • 5.8Affected
  • before 5.8Not affected
  • 6.1.93 through 6.1.*Not affected
  • 6.6.33 through 6.6.*Not affected
  • 6.8.12 through 6.8.*Not affected
  • 6.9.3 through 6.9.*Not affected
  • 6.10 and laterNot affected

References

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