ghsa-wfjg-crvw-f25h
Vulnerability from github
Published
2025-12-30 15:30
Modified
2025-12-30 15:30
Details

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

debugobjects: Don't wake up kswapd from fill_pool()

syzbot is reporting a lockdep warning in fill_pool() because the allocation from debugobjects is using GFP_ATOMIC, which is (__GFP_HIGH | __GFP_KSWAPD_RECLAIM) and therefore tries to wake up kswapd, which acquires kswapd_wait::lock.

Since fill_pool() might be called with arbitrary locks held, fill_pool() should not assume that acquiring kswapd_wait::lock is safe.

Use __GFP_HIGH instead and remove __GFP_NORETRY as it is pointless for !__GFP_DIRECT_RECLAIM allocation.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54268"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-30T13:16:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Don\u0027t wake up kswapd from fill_pool()\n\nsyzbot is reporting a lockdep warning in fill_pool() because the allocation\nfrom debugobjects is using GFP_ATOMIC, which is (__GFP_HIGH | __GFP_KSWAPD_RECLAIM)\nand therefore tries to wake up kswapd, which acquires kswapd_wait::lock.\n\nSince fill_pool() might be called with arbitrary locks held, fill_pool()\nshould not assume that acquiring kswapd_wait::lock is safe.\n\nUse __GFP_HIGH instead and remove __GFP_NORETRY as it is pointless for\n!__GFP_DIRECT_RECLAIM allocation.",
  "id": "GHSA-wfjg-crvw-f25h",
  "modified": "2025-12-30T15:30:34Z",
  "published": "2025-12-30T15:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54268"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c088d30a72d9b8f9c6ae9362222942e4075cb00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aee97eec77029270866c704f66cdf2881cbd2fe1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be646802b3dc408c4dc72a3ac32c3f4a0282414d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7fff52c99d52f180d8bef95d8ed8fec6343889c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb799279fb1f9c63c520fe8c1c41cb9154252db6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd673079749bac97bb30f1461df079e6c8e86511"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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