cve/2024/CVE-2024-38543.md

### [CVE-2024-38543](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-38543)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=5.8%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=b2ef9f5a5cb37643ca5def3516c546457074b882%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=blue)

### Description

In the Linux kernel, the following vulnerability has been resolved:lib/test_hmm.c: handle src_pfns and dst_pfns allocation failureThe kcalloc() in dmirror_device_evict_chunk() will return null if thephysical memory has run out.  As a result, if src_pfns or dst_pfns isdereferenced, the null pointer dereference bug will happen.Moreover, the device is going away.  If the kcalloc() fails, the pagesmapping a chunk could not be evicted.  So add a __GFP_NOFAIL flag inkcalloc().Finally, as there is no need to have physically contiguous memory, Switchkcalloc() to kvcalloc() in order to avoid failing allocations.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds