Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Disable DMCUB timeout for DCN35 [Why] DMCUB can intermittently take longer than expected to process commands. Old ASIC policy was to continue while logging a diagnostic error - which works fine for ASIC without IPS, but with IPS this could lead to a race condition where we attempt to access DCN state while it's inaccessible, leading to a system hang when the NIU port is not disabled or register accesses that timeout and the display configuration in an undefined state. [How] We need to investigate why these accesses take longer than expected, but for now we should disable the timeout on DCN35 to avoid this race condition. Since the waits happen only at lower interrupt levels the risk of taking too long at higher IRQ and causing a system watchdog timeout are minimal.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before 31c254c9cd4b122a10db297124f867107a696d83; affected 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c before 7c70e60fbf4bff1123f0e8d5cb1ae71df6164d7f |
| Linux / Linux | affected 4.15; unaffected 0 before 4.15; unaffected 6.10.9 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/31c254c9cd4b122a10db297124f867107a696d83
- https://git.kernel.org/stable/c/7c70e60fbf4bff1123f0e8d5cb1ae71df6164d7f
ADP enrichment
No English description supplied.
No references supplied.