Linux i915 GPU kernel driver (active barrier tracking): Non-idle barriers were misused as fence trackers, corrupting

Impact

Non-idle barriers were misused as fence trackers, corrupting kernel lists when i915 perf is in use. Users hit this as an oops on list corruption - node down, jobs lost.

Who can reach it

Any local user or container with a DRM render node - i.e. any tenant that was scheduled a GPU. No privileged capability needed.

What to do

Fix ships in the Linux kernel. Update the kernel and reboot the node - in practice this is a drain plus reboot because the accelerator driver cannot be unloaded while jobs hold device file descriptors. No BIOS or firmware update needed.

References