fkie_cve-2025-22125
Vulnerability from fkie_nvd
Published
2025-04-16 15:16
Modified
2025-04-17 20:22
Severity ?
Summary
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")
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8a0adf3d778c4a0893c6d34a9e1b0082a6f1c495
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e879a0d9cb086c8e52ce6c04e5bfa63825a6213c
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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\")"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: md/raid1,raid10: no ignorar los indicadores de E/S. Si blk-wbt est\u00e1 habilitado por defecto, el rendimiento de escritura en RAID es bastante bajo, ya que todas las E/S son limitadas por wbt de los discos subyacentes, debido a que se ignora el indicador REQ_IDLE. Resulta que este comportamiento existe desde la introducci\u00f3n de blk-wbt. Adem\u00e1s de REQ_IDLE, tampoco se deben ignorar otros indicadores; por ejemplo, se puede configurar REQ_META para sistemas de archivos; borrarlo puede causar problemas de inversi\u00f3n de prioridad. REQ_NOWAIT tampoco se debe borrar, ya que la E/S esperar\u00e1 en lugar de fallar directamente en los discos subyacentes. Para solucionar estos problemas, mantenga los indicadores de E/S de la bios maestra. Fises: f51d46d0e7cb (\"md: a\u00f1adir soporte para REQ_NOWAIT\")"
    }
  ],
  "id": "CVE-2025-22125",
  "lastModified": "2025-04-17T20:22:16.240",
  "metrics": {},
  "published": "2025-04-16T15:16:06.630",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8a0adf3d778c4a0893c6d34a9e1b0082a6f1c495"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e879a0d9cb086c8e52ce6c04e5bfa63825a6213c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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