ghsa-3q6x-gxwh-88p9
Vulnerability from github
Published
2024-06-19 15:30
Modified
2024-08-29 03:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-38543"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-19T14:15:14Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib/test_hmm.c: handle src_pfns and dst_pfns allocation failure\n\nThe kcalloc() in dmirror_device_evict_chunk() will return null if the\nphysical memory has run out.  As a result, if src_pfns or dst_pfns is\ndereferenced, the null pointer dereference bug will happen.\n\nMoreover, the device is going away.  If the kcalloc() fails, the pages\nmapping a chunk could not be evicted.  So add a __GFP_NOFAIL flag in\nkcalloc().\n\nFinally, as there is no need to have physically contiguous memory, Switch\nkcalloc() to kvcalloc() in order to avoid failing allocations.",
  "id": "GHSA-3q6x-gxwh-88p9",
  "modified": "2024-08-29T03:30:48Z",
  "published": "2024-06-19T15:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38543"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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