b2b8af21fe
The drm_sched_job_unschedulable trace point can access
entity->dependency after it was cleared by the callback
installed in drm_sched_entity_add_dependency_cb, causing:
BUG: kernel NULL pointer dereference, address: 0000000000000020
[...]
Workqueue: comp_1.1.0 drm_sched_run_job_work [gpu_sched]
RIP: 0010:trace_event_raw_event_drm_sched_job_unschedulable+0x70/0xd0 [gpu_sched]
To fix this we either need to keep a reference to the fence before
setting up the callbacks, or move the trace_drm_sched_job_unschedulable
calls into drm_sched_entity_add_dependency_cb where they can be
done earlier.
Fixes:
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|---|---|---|
| .. | ||
| tests | ||
| .kunitconfig | ||
| Makefile | ||
| gpu_scheduler_trace.h | ||
| sched_entity.c | ||
| sched_fence.c | ||
| sched_internal.h | ||
| sched_main.c | ||