Description
In the Linux kernel, the following vulnerability has been resolved: drm/i915: mark requests for GuC virtual engines to avoid use-after-free References to i915_requests may be trapped by userspace inside a sync_file or dmabuf (dma-resv) and held indefinitely across different proceses. To counter-act the memory leaks, we try to not to keep references from the request past their completion. On the other side on fence release we need to know if rq->engine is valid and points to hw engine (true for non-virtual requests). To make it possible extra bit has been added to rq->execution_mask, for marking virtual engines. (cherry picked from commit 280410677af763f3871b93e794a199cfcf6fb580)
Product status
bcb9aa45d5a0e11ef91245330c53cde214d15e8d (git) before 8017a27cec32eac8c8f9430b0a3055840136b856
bcb9aa45d5a0e11ef91245330c53cde214d15e8d (git) before 7fb464d52fa41c31a6fd1ad82888e67c65935d94
bcb9aa45d5a0e11ef91245330c53cde214d15e8d (git) before 5eefc5307c983b59344a4cb89009819f580c84fa
6.0
Any version before 6.0
6.1.54 (semver)
6.5.4 (semver)
6.6 (original_commit_for_fix)
References
git.kernel.org/...c/8017a27cec32eac8c8f9430b0a3055840136b856
git.kernel.org/...c/7fb464d52fa41c31a6fd1ad82888e67c65935d94
git.kernel.org/...c/5eefc5307c983b59344a4cb89009819f580c84fa
