GHSA-HR43-3HQ8-GGG4

Vulnerability from github – Published: 2025-03-06 18:31 – Updated: 2025-11-03 21:33
VLAI?
Details

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

tomoyo: don't emit warning in tomoyo_write_control()

syzbot is reporting too large allocation warning at tomoyo_write_control(), for one can write a very very long line without new line character. To fix this warning, I use __GFP_NOWARN rather than checking for KMALLOC_MAX_SIZE, for practically a valid line should be always shorter than 32KB where the "too small to fail" memory-allocation rule applies.

One might try to write a valid line that is longer than 32KB, but such request will likely fail with -ENOMEM. Therefore, I feel that separately returning -EINVAL when a line is longer than KMALLOC_MAX_SIZE is redundant. There is no need to distinguish over-32KB and over-KMALLOC_MAX_SIZE.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-58085"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-06T17:15:21Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntomoyo: don\u0027t emit warning in tomoyo_write_control()\n\nsyzbot is reporting too large allocation warning at tomoyo_write_control(),\nfor one can write a very very long line without new line character. To fix\nthis warning, I use __GFP_NOWARN rather than checking for KMALLOC_MAX_SIZE,\nfor practically a valid line should be always shorter than 32KB where the\n\"too small to fail\" memory-allocation rule applies.\n\nOne might try to write a valid line that is longer than 32KB, but such\nrequest will likely fail with -ENOMEM. Therefore, I feel that separately\nreturning -EINVAL when a line is longer than KMALLOC_MAX_SIZE is redundant.\nThere is no need to distinguish over-32KB and over-KMALLOC_MAX_SIZE.",
  "id": "GHSA-hr43-3hq8-ggg4",
  "modified": "2025-11-03T21:33:08Z",
  "published": "2025-03-06T18:31:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-58085"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3df7546fc03b8f004eee0b9e3256369f7d096685"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/414705c0303350d139b1dc18f329fe47dfb642dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a01c200fa7eb59da4d2dbbb48b61f4a0d196c09f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2bd5857a0d6973ebbcb4d9831ddcaebbd257be1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c67efabddc73171c7771d3ffe4ffa1e503ee533e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9382f380e8d09209b8e5c0def0545852168be25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6b37b3e12de638753bce79a2858070b9c4a4ad3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe1c021eb03dae0dc9dce55e81f77a60e419a27a"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    }
  ],
  "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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