drm/amdgpu: force complete the MES ring fences on reset

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Summary

CVECVE-2026-89812
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:16:46 UTC
Updated2026-09-17 10:17:04 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: force complete the MES ring fences on reset The MES scheduler ring has no drm scheduler (no_scheduler = true), so it is skipped by the force-completion loop in amdgpu_device_pre_asic_reset(). It uses a polling fence whose hw value lives in wb (GTT) memory and survives a MODE1 reset, while fence_drv.sync_seq keeps advancing for every packet. When the reset is triggered because MES itself stopped responding, the timed-out packets advance sync_seq past the last hw fence value MES wrote. After resume the first MES submission polls forever on a seq that is never written back, failing the resume and wedging the box on a second reset: amdgpu: MES ring buffer is full. amdgpu: *ERROR* ring gfx_0.0.0 test failed (-110) amdgpu: resume of IP block <gfx_v11_0> failed -110 amdgpu: GPU reset end with ret = -110 Force complete the MES scheduler ring fences together with the scheduler rings so their hw fence is realigned to sync_seq. v2: cover all XCCs (one scheduler ring each), not just mes.ring[0].

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 34e087e8920e635c62e2ed6a758b0cd27f836d13 ebe7542553d008e2285e0fbba0c63f0295a7e694 git Not specified
CNA Linux Linux affected 34e087e8920e635c62e2ed6a758b0cd27f836d13 48dc279c3010ac8f91b1845b2abb3a1e9943a0f5 git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ebe7542553d008e2285e0fbba0c63f0295a7e694 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/48dc279c3010ac8f91b1845b2abb3a1e9943a0f5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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