ghsa-7qcg-gp93-223m
Vulnerability from github
Published
2024-05-22 09:31
Modified
2024-11-05 18:31
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Details

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

kunit: fix reference count leak in kfree_at_end

The reference counting issue happens in the normal path of kfree_at_end(). When kunit_alloc_and_get_resource() is invoked, the function forgets to handle the returned resource object, whose refcount increased inside, causing a refcount leak.

Fix this issue by calling kunit_alloc_resource() instead of kunit_alloc_and_get_resource().

Fixed the following when applying: Shuah Khan skhan@linuxfoundation.org

CHECK: Alignment should match open parenthesis + kunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL, (void *)to_free);

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47467"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-22T07:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkunit: fix reference count leak in kfree_at_end\n\nThe reference counting issue happens in the normal path of\nkfree_at_end(). When kunit_alloc_and_get_resource() is invoked, the\nfunction forgets to handle the returned resource object, whose refcount\nincreased inside, causing a refcount leak.\n\nFix this issue by calling kunit_alloc_resource() instead of\nkunit_alloc_and_get_resource().\n\nFixed the following when applying:\nShuah Khan \u003cskhan@linuxfoundation.org\u003e\n\nCHECK: Alignment should match open parenthesis\n+\tkunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL,\n \t\t\t\t     (void *)to_free);",
  "id": "GHSA-7qcg-gp93-223m",
  "modified": "2024-11-05T18:31:59Z",
  "published": "2024-05-22T09:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47467"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bbdd158b40b66a9403391a517f24ef6613573446"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f62314b1ced25c58b86e044fc951cd6a1ea234cf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}


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