CVEvulnerability
CVE-2026-89813
- Status
- Received
- Published
- 2026-09-16
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: force complete the KIQ ring fences on reset
Like the MES scheduler ring, the KIQ ring sets no_scheduler = true and uses a
polling fence, so it is skipped by the force-completion loop in
amdgpu_device_pre_asic_reset(). Its hw fence value lives in wb (GTT) memory and
survives a MODE1 reset while fence_drv.sync_seq keeps advancing, so after a
reset the first KIQ submission can poll forever on a seq that is never written
back.
Force complete the KIQ ring fences too so their hw fence is realigned to
sync_seq.
References
- https://git.kernel.org/stable/c/11adb2bae30a3155395594e5c9bc0daf0c4ffa15 git.kernel.org
- https://git.kernel.org/stable/c/9944329e409b04d71fa22f39b38a4bd78b75bcd9 git.kernel.org
- https://git.kernel.org/stable/c/bdd6a58743e00ebc6d52b9cdf9aafb4e535e0b71 git.kernel.org
- https://git.kernel.org/stable/c/c26cbd5c33cd72daa03079235de60688a3c97c52 git.kernel.org
- https://git.kernel.org/stable/c/fd65d1742992361fc2201ecb4e43411e6e417fcb git.kernel.org