cve-2024-44956
Vulnerability from cvelistv5
Published
2024-09-04 18:35
Modified
2024-12-19 09:19
Severity ?
Summary
drm/xe/preempt_fence: enlarge the fence critical section
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3cd1585e57908b6efcd967465ef7685f40b2a294Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006fPatch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/preempt_fence: enlarge the fence critical section\n\nIt is really easy to introduce subtle deadlocks in\npreempt_fence_work_func() since we operate on single global ordered-wq\nfor signalling our preempt fences behind the scenes, so even though we\nsignal a particular fence, everything in the callback should be in the\nfence critical section, since blocking in the callback will prevent\nother published fences from signalling. If we enlarge the fence critical\nsection to cover the entire callback, then lockdep should be able to\nunderstand this better, and complain if we grab a sensitive lock like\nvm-\u003elock, which is also held when waiting on preempt fences."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-44956",
    "datePublished": "2024-09-04T18:35:55.140Z",
    "dateReserved": "2024-08-21T05:34:56.666Z",
    "dateUpdated": "2024-12-19T09:19:04.986Z",
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