ghsa-3wr8-w2fq-6q7v
Vulnerability from github
Published
2025-04-16 15:34
Modified
2025-11-03 18:31
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:

md/raid1,raid10: don't ignore IO flags

If blk-wbt is enabled by default, it's found that raid write performance is quite bad because all IO are throttled by wbt of underlying disks, due to flag REQ_IDLE is ignored. And turns out this behaviour exist since blk-wbt is introduced.

Other than REQ_IDLE, other flags should not be ignored as well, for example REQ_META can be set for filesystems, clearing it can cause priority reverse problems; And REQ_NOWAIT should not be cleared as well, because io will wait instead of failing directly in underlying disks.

Fix those problems by keep IO flags from master bio.

Fises: f51d46d0e7cb ("md: add support for REQ_NOWAIT")

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22125"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:16:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1,raid10: don\u0027t ignore IO flags\n\nIf blk-wbt is enabled by default, it\u0027s found that raid write performance\nis quite bad because all IO are throttled by wbt of underlying disks,\ndue to flag REQ_IDLE is ignored. And turns out this behaviour exist since\nblk-wbt is introduced.\n\nOther than REQ_IDLE, other flags should not be ignored as well, for\nexample REQ_META can be set for filesystems, clearing it can cause priority\nreverse problems; And REQ_NOWAIT should not be cleared as well, because\nio will wait instead of failing directly in underlying disks.\n\nFix those problems by keep IO flags from master bio.\n\nFises: f51d46d0e7cb (\"md: add support for REQ_NOWAIT\")",
  "id": "GHSA-3wr8-w2fq-6q7v",
  "modified": "2025-11-03T18:31:15Z",
  "published": "2025-04-16T15:34:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22125"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73506e581c0b1814cdfd2229d589f30751d7de26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a0adf3d778c4a0893c6d34a9e1b0082a6f1c495"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e879a0d9cb086c8e52ce6c04e5bfa63825a6213c"
    }
  ],
  "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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