drm/v3d: Associate BOs with every job that accesses them

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Summary

CVECVE-2026-93047
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:57 UTC
Updated2026-09-17 17:17:57 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/v3d: Associate BOs with every job that accesses them A submission can expand into a chain of jobs (e.g. bin + render + cache clean). Implicit synchronization in v3d_submit_lock_reservations() is gated on each job's bo[], but the BO list was only ever attached to the last job of the chain. When that last job is a trailing CACHE_CLEAN job, the job that actually consumes the BOs (that is, a RENDER or CSD job) was left with bo_count == 0 and picked up no implicit dependencies. It could therefore be dispatched to the hardware and read a BO while another context was still writing it, leading to data corruption. Attach the BOs to the job that consumes them, so (1) it acquires the correct implicit dependencies during reservation locking and (2) they are kept mapped until the end of the submission. Give it references to all consuming job's BOs through v3d_job_reference_bos() instead of looking the handles up a second time; that avoids a redundant lookup and guarantees both jobs reference the exact same objects. As the CACHE_CLEAN job now carries a BO array as well, add a per-job `has_implicit_dep` flag so that only the consuming jobs take implicit dependencies. The CACHE_CLEAN job (a global flush) and the BIN job (binning waiting on another context is not a realistic scenario) are excluded.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected dffa9b7a78c4361e55e21b3acb54e0d34ad15ea0 7244dd0f12629484a1936dc5c5837670d8d9f80c git Not specified
CNA Linux Linux affected dffa9b7a78c4361e55e21b3acb54e0d34ad15ea0 fa98563ab00dbe62fcedfef6bdd34ded7a860d9f git Not specified
CNA Linux Linux affected 5.3 Not specified
CNA Linux Linux unaffected 5.3 semver Not specified
CNA Linux Linux unaffected 7.2.6 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/fa98563ab00dbe62fcedfef6bdd34ded7a860d9f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7244dd0f12629484a1936dc5c5837670d8d9f80c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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