fkie_cve-2022-49914
Vulnerability from fkie_nvd
Published
2025-05-01 15:16
Modified
2025-05-02 13:52
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix inode list leak during backref walking at resolve_indirect_refs() During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes. Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2c0329406bb28109c07c6e23e5e3e0fa618a95d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/396515db923ad5cbeb179d6b88927870b4cbebb7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a52e24c7fcc3c5ce3588a14e3663c00868d36623
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1dc9019bb5f89abae85645de1a2dd4830c1f8e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cded2c89774b99b67c98147ae103ea878c92a206
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix inode list leak during backref walking at resolve_indirect_refs()\n\nDuring backref walking, at resolve_indirect_refs(), if we get an error\nwe jump to the \u0027out\u0027 label and call ulist_free() on the \u0027parents\u0027 ulist,\nwhich frees all the elements in the ulist - however that does not free\nany inode lists that may be attached to elements, through the \u0027aux\u0027 field\nof a ulist node, so we end up leaking lists if we have any attached to\nthe unodes.\n\nFix this by calling free_leaf_list() instead of ulist_free() when we exit\nfrom resolve_indirect_refs(). The static function free_leaf_list() is\nmoved up for this to be possible and it\u0027s slightly simplified by removing\nunnecessary code."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: correcci\u00f3n de fuga de lista de inodos durante el recorrido de backref en resolve_indirect_refs() Durante el recorrido de backref, en resolve_indirect_refs(), si obtenemos un error saltamos a la etiqueta \u0027out\u0027 y llamamos a ulist_free() en la ulist \u0027parents\u0027, que libera todos los elementos en la ulist - sin embargo, eso no libera ninguna lista de inodos que pueda estar adjunta a elementos, a trav\u00e9s del campo \u0027aux\u0027 de un nodo ulist, por lo que terminamos filtrando listas si tenemos alguna adjunta a los unodes. Arregle esto llamando a free_leaf_list() en lugar de ulist_free() cuando salimos de resolve_indirect_refs(). La funci\u00f3n est\u00e1tica free_leaf_list() se mueve hacia arriba para que esto sea posible y se simplifica ligeramente eliminando c\u00f3digo innecesario."
    }
  ],
  "id": "CVE-2022-49914",
  "lastModified": "2025-05-02T13:52:51.693",
  "metrics": {},
  "published": "2025-05-01T15:16:16.593",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2c0329406bb28109c07c6e23e5e3e0fa618a95d7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/396515db923ad5cbeb179d6b88927870b4cbebb7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a52e24c7fcc3c5ce3588a14e3663c00868d36623"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1dc9019bb5f89abae85645de1a2dd4830c1f8e9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cded2c89774b99b67c98147ae103ea878c92a206"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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