CVE-2024-44956
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-44956
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-44956.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-44956
- Downstream
- Published
- 2024-09-04T18:35:55Z
- Modified
- 2025-10-15T13:53:16.967055Z
- Summary
- drm/xe/preempt_fence: enlarge the fence critical section
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/xe/preempt_fence: enlarge the fence critical section
It is really easy to introduce subtle deadlocks in preemptfencework_func() since we operate on single global ordered-wq for signalling our preempt fences behind the scenes, so even though we signal a particular fence, everything in the callback should be in the fence critical section, since blocking in the callback will prevent other published fences from signalling. If we enlarge the fence critical section to cover the entire callback, then lockdep should be able to understand this better, and complain if we grab a sensitive lock like vm->lock, which is also held when waiting on preempt fences.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd08ebf6c3525a7ea2186e636df064ea47281987Fixed458bb83119dfee5d14c677f7846dd9363817006f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd08ebf6c3525a7ea2186e636df064ea47281987Fixed3cd1585e57908b6efcd967465ef7685f40b2a294
Affected versions
v6.*
v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.10.1
v6.10.2
v6.10.3
v6.10.4
v6.7
v6.7-rc4
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7
Database specific
{
"vanir_signatures": [
{
"signature_version": "v1",
"target": {
"file": "drivers/gpu/drm/xe/xe_preempt_fence.c"
},
"signature_type": "Line",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@3cd1585e57908b6efcd967465ef7685f40b2a294",
"deprecated": false,
"digest": {
"line_hashes": [
"15535060908781466996393896778372475476",
"322726708907518246103975734395116045215",
"172205857295110071488799415216538581964",
"309683934479351928644797732749296862446",
"236548087879029124628237262084640238147",
"104562511984612160086969714502452567341"
],
"threshold": 0.9
},
"id": "CVE-2024-44956-39f06d02"
},
{
"signature_version": "v1",
"target": {
"function": "preempt_fence_work_func",
"file": "drivers/gpu/drm/xe/xe_preempt_fence.c"
},
"signature_type": "Function",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@3cd1585e57908b6efcd967465ef7685f40b2a294",
"deprecated": false,
"digest": {
"length": 366.0,
"function_hash": "311149263541003934641459739540474978976"
},
"id": "CVE-2024-44956-53b5c2b9"
},
{
"signature_version": "v1",
"target": {
"function": "preempt_fence_work_func",
"file": "drivers/gpu/drm/xe/xe_preempt_fence.c"
},
"signature_type": "Function",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@458bb83119dfee5d14c677f7846dd9363817006f",
"deprecated": false,
"digest": {
"length": 366.0,
"function_hash": "311149263541003934641459739540474978976"
},
"id": "CVE-2024-44956-d1104a7d"
},
{
"signature_version": "v1",
"target": {
"file": "drivers/gpu/drm/xe/xe_preempt_fence.c"
},
"signature_type": "Line",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@458bb83119dfee5d14c677f7846dd9363817006f",
"deprecated": false,
"digest": {
"line_hashes": [
"15535060908781466996393896778372475476",
"322726708907518246103975734395116045215",
"172205857295110071488799415216538581964",
"309683934479351928644797732749296862446",
"236548087879029124628237262084640238147",
"104562511984612160086969714502452567341"
],
"threshold": 0.9
},
"id": "CVE-2024-44956-f4664d03"
}
]
}