In drm_sched_job_init(), commit 56e449603f0a ("drm/sched: Convert the
GPU scheduler to variable number of run-queues") implemented a call to
drm_err(), which uses the job's scheduler pointer as a parameter.
job->sched, however, is not yet valid as it gets set by
drm_sched_job_arm(), which is always called after drm_sched_job_init().Since the scheduler code has no control over how the API-User has allocated or set 'job', the pointer's dereference is undefined behavior. Fix the UB by replacing drm_err() with pr_err(). Cc: <[email protected]> # 6.7+ Fixes: 56e449603f0a ("drm/sched: Convert the GPU scheduler to variable number of run-queues") Reported-by: Danilo Krummrich <[email protected]> Closes: https://lore.kernel.org/lkml/[email protected]/ Signed-off-by: Philipp Stanner <[email protected]> --- drivers/gpu/drm/scheduler/sched_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 7e90c9f95611..356c30fa24a8 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -797,7 +797,7 @@ int drm_sched_job_init(struct drm_sched_job *job, * or worse--a blank screen--leave a trail in the * logs, so this can be debugged easier. */ - drm_err(job->sched, "%s: entity has no rq!\n", __func__); + pr_err("*ERROR* %s: entity has no rq!\n", __func__); return -ENOENT; } -- 2.46.0
