ghsa-pv8w-5hmg-8mf4
Vulnerability from github
Published
2024-05-17 15:31
Modified
2024-05-17 15:31
Details
In the Linux kernel, the following vulnerability has been resolved:
debugfs: fix wait/cancellation handling during remove
Ben Greear further reports deadlocks during concurrent debugfs remove while files are being accessed, even though the code in question now uses debugfs cancellations. Turns out that despite all the review on the locking, we missed completely that the logic is wrong: if the refcount hits zero we can finish (and need not wait for the completion), but if it doesn't we have to trigger all the cancellations. As written, we can never get into the loop triggering the cancellations. Fix this, and explain it better while at it.
{
"affected": [],
"aliases": [
"CVE-2024-35793"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-17T13:15:59Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: fix wait/cancellation handling during remove\n\nBen Greear further reports deadlocks during concurrent debugfs\nremove while files are being accessed, even though the code in\nquestion now uses debugfs cancellations. Turns out that despite\nall the review on the locking, we missed completely that the\nlogic is wrong: if the refcount hits zero we can finish (and\nneed not wait for the completion), but if it doesn\u0027t we have\nto trigger all the cancellations. As written, we can _never_\nget into the loop triggering the cancellations. Fix this, and\nexplain it better while at it.",
"id": "GHSA-pv8w-5hmg-8mf4",
"modified": "2024-05-17T15:31:08Z",
"published": "2024-05-17T15:31:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35793"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3d08cca5fd0aabb62b7015067ab40913b33da906"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/952c3fce297f12c7ff59380adb66b564e2bc9b64"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e88b5ae01901c4a655a53158397746334778a57b"
}
],
"schema_version": "1.4.0",
"severity": []
}
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