Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b2ef9f5a5cb37643ca5def3516c546457074b882 before 1a21fdeea502658e315bd939409b755974f4fb64; affected b2ef9f5a5cb37643ca5def3516c546457074b882 before 65e528a69cb3ed4a286c45b4afba57461c8b5b33; affected b2ef9f5a5cb37643ca5def3516c546457074b882 before ce47e8ead9a72834cc68431d53f8092ce69bebb7; affected b2ef9f5a5cb37643ca5def3516c546457074b882 before 3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc; affected b2ef9f5a5cb37643ca5def3516c546457074b882 before c2af060d1c18beaec56351cf9c9bcbbc5af341a3 |
| Linux / Linux | affected 5.8; unaffected 0 before 5.8; unaffected 6.1.93 through 6.1.*; unaffected 6.6.33 through 6.6.*; unaffected 6.8.12 through 6.8.*; unaffected 6.9.3 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64
- https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33
- https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7
- https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc
- https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64
- https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33
- https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7
- https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc
- https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3
No English description supplied.
No references supplied.