ghsa-m2jr-hqxr-7x3f
Vulnerability from github
Published
2024-05-01 06:31
Modified
2024-05-01 06:31
Details

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

nouveau/dmem: handle kcalloc() allocation failure

The kcalloc() in nouveau_dmem_evict_chunk() will return null if the physical memory has run out. As a result, if we dereference src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs will happen.

Moreover, the GPU is going away. If the kcalloc() fails, we could not evict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL flag in kcalloc().

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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-26943"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T06:15:09Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnouveau/dmem: handle kcalloc() allocation failure\n\nThe kcalloc() in nouveau_dmem_evict_chunk() will return null if\nthe physical memory has run out. As a result, if we dereference\nsrc_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs\nwill happen.\n\nMoreover, the GPU is going away. If the kcalloc() fails, we could not\nevict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL\nflag in kcalloc().\n\nFinally, as there is no need to have physically contiguous memory,\nthis patch switches kcalloc() to kvcalloc() in order to avoid\nfailing allocations.",
  "id": "GHSA-m2jr-hqxr-7x3f",
  "modified": "2024-05-01T06:31:41Z",
  "published": "2024-05-01T06:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26943"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16e87fe23d4af6df920406494ced5c0f4354567b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a84744a037b8a511d6a9055f3defddc28ff4a4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e82f7383e0b82a835e6b6b06a348b2bc4e2c2ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e81773757a95fc298e96cfd6d4700f07b6192a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9acfd8b083a0ffbd387566800d89f55058a68af2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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