ghsa-jgm3-v9g7-rfc3
Vulnerability from github
Published
2025-05-01 15:31
Modified
2025-05-01 15:31
Details
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.
{
"affected": [],
"aliases": [
"CVE-2022-49914"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-01T15:16:16Z",
"severity": null
},
"details": "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.",
"id": "GHSA-jgm3-v9g7-rfc3",
"modified": "2025-05-01T15:31:52Z",
"published": "2025-05-01T15:31:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49914"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2c0329406bb28109c07c6e23e5e3e0fa618a95d7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/396515db923ad5cbeb179d6b88927870b4cbebb7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a52e24c7fcc3c5ce3588a14e3663c00868d36623"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b1dc9019bb5f89abae85645de1a2dd4830c1f8e9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cded2c89774b99b67c98147ae103ea878c92a206"
}
],
"schema_version": "1.4.0",
"severity": []
}
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