ghsa-x9qw-9cw3-55vf
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
drm/imagination: avoid deadlock on fence release
Do scheduler queue fence release processing on a workqueue, rather than in the release function itself.
Fixes deadlock issues such as the following:
[ 607.400437] ============================================ [ 607.405755] WARNING: possible recursive locking detected [ 607.415500] -------------------------------------------- [ 607.420817] weston:zfq0/24149 is trying to acquire lock: [ 607.426131] ffff000017d041a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: pvr_gem_object_vunmap+0x40/0xc0 [powervr] [ 607.436728] but task is already holding lock: [ 607.442554] ffff000017d105a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: dma_buf_ioctl+0x250/0x554 [ 607.451727] other info that might help us debug this: [ 607.458245] Possible unsafe locking scenario:
[ 607.464155] CPU0 [ 607.466601] ---- [ 607.469044] lock(reservation_ww_class_mutex); [ 607.473584] lock(reservation_ww_class_mutex); [ 607.478114] *** DEADLOCK ***
{
"affected": [],
"aliases": [
"CVE-2025-21911"
],
"database_specific": {
"cwe_ids": [
"CWE-667"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-01T16:15:21Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/imagination: avoid deadlock on fence release\n\nDo scheduler queue fence release processing on a workqueue, rather\nthan in the release function itself.\n\nFixes deadlock issues such as the following:\n\n[ 607.400437] ============================================\n[ 607.405755] WARNING: possible recursive locking detected\n[ 607.415500] --------------------------------------------\n[ 607.420817] weston:zfq0/24149 is trying to acquire lock:\n[ 607.426131] ffff000017d041a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: pvr_gem_object_vunmap+0x40/0xc0 [powervr]\n[ 607.436728]\n but task is already holding lock:\n[ 607.442554] ffff000017d105a0 (reservation_ww_class_mutex){+.+.}-{3:3}, at: dma_buf_ioctl+0x250/0x554\n[ 607.451727]\n other info that might help us debug this:\n[ 607.458245] Possible unsafe locking scenario:\n\n[ 607.464155] CPU0\n[ 607.466601] ----\n[ 607.469044] lock(reservation_ww_class_mutex);\n[ 607.473584] lock(reservation_ww_class_mutex);\n[ 607.478114]\n *** DEADLOCK ***",
"id": "GHSA-x9qw-9cw3-55vf",
"modified": "2025-04-15T18:31:42Z",
"published": "2025-04-01T18:30:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21911"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9bd8b8d34cf4efba18766d64f817c819ed1bbde7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d993ae7360923efd6ade43a32043459a121c28c1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/df1a1ed5e1bdd9cc13148e0e5549f5ebcf76cf13"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.