fkie_cve-2025-38659
Vulnerability from fkie_nvd
Published
2025-08-22 16:15
Modified
2025-08-22 18:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: gfs2: No more self recovery When a node withdraws and it turns out that it is the only node that has the filesystem mounted, gfs2 currently tries to replay the local journal to bring the filesystem back into a consistent state. Not only is that a very bad idea, it has also never worked because gfs2_recover_func() will refuse to do anything during a withdraw. However, before even getting to this point, gfs2_recover_func() dereferences sdp->sd_jdesc->jd_inode. This was a use-after-free before commit 04133b607a78 ("gfs2: Prevent double iput for journal on error") and is a NULL pointer dereference since then. Simply get rid of self recovery to fix that.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1a91ba12abef628b43cada87478328274d988e88
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6784367b2f3cd7b89103de35764f37f152590dbd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97c94c7dbddc34d353c83b541b3decabf98d04af
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/deb016c1669002e48c431d6fd32ea1c20ef41756
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5426ffbec971a8f7346a57392d3a901bdee5a9b
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\ngfs2: No more self recovery\n\nWhen a node withdraws and it turns out that it is the only node that has\nthe filesystem mounted, gfs2 currently tries to replay the local journal\nto bring the filesystem back into a consistent state.  Not only is that\na very bad idea, it has also never worked because gfs2_recover_func()\nwill refuse to do anything during a withdraw.\n\nHowever, before even getting to this point, gfs2_recover_func()\ndereferences sdp-\u003esd_jdesc-\u003ejd_inode.  This was a use-after-free before\ncommit 04133b607a78 (\"gfs2: Prevent double iput for journal on error\")\nand is a NULL pointer dereference since then.\n\nSimply get rid of self recovery to fix that."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: gfs2: No m\u00e1s autorrecuperaci\u00f3n. Cuando un nodo se retira y resulta ser el \u00fanico que tiene montado el sistema de archivos, gfs2 intenta reproducir el diario local para restablecer la consistencia del sistema de archivos. Esto no solo es una p\u00e9sima idea, sino que nunca ha funcionado, ya que gfs2_recover_func() se niega a hacer nada durante una retirada. Sin embargo, incluso antes de llegar a este punto, gfs2_recover_func() desreferencia sdp-\u0026gt;sd_jdesc-\u0026gt;jd_inode. Esto era un use-after-free antes del commit 04133b607a78 (\"gfs2: Evitar doble entrada para el diario en caso de error\") y, desde entonces, es una desreferencia de puntero nulo. Simplemente elimine la autorrecuperaci\u00f3n para solucionarlo."
    }
  ],
  "id": "CVE-2025-38659",
  "lastModified": "2025-08-22T18:08:51.663",
  "metrics": {},
  "published": "2025-08-22T16:15:41.053",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1a91ba12abef628b43cada87478328274d988e88"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6784367b2f3cd7b89103de35764f37f152590dbd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/97c94c7dbddc34d353c83b541b3decabf98d04af"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/deb016c1669002e48c431d6fd32ea1c20ef41756"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f5426ffbec971a8f7346a57392d3a901bdee5a9b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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