CVE-2024-38543

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.

• linux linux kernel (>= 5.8 < 6.1.93) • linux linux kernel (>= 6.2 < 6.6.33) • linux linux kernel (>= 6.7 < 6.8.12) • linux linux kernel (>= 6.9 < 6.9.3)