From 9e7f30563677fbeff62d368d5d2a5ac7aaa9746a Mon Sep 17 00:00:00 2001 From: Matthew Brost Date: Tue, 20 Aug 2024 13:23:09 -0700 Subject: [PATCH] drm/xe: Free job before xe_exec_queue_put Free job depends on job->vm being valid, the last xe_exec_queue_put can destroy the VM. Prevent UAF by freeing job before xe_exec_queue_put. Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs") Signed-off-by: Matthew Brost Reviewed-by: Nirmoy Das Reviewed-by: Jagmeet Randhawa Link: https://patchwork.freedesktop.org/patch/msgid/20240820202309.1260755-1-matthew.brost@intel.com (cherry picked from commit 32a42c93b74c8ca6d0915ea3eba21bceff53042f) Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/xe/xe_sched_job.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/xe/xe_sched_job.c b/drivers/gpu/drm/xe/xe_sched_job.c index 44d534e362cd..9628f9deb3c0 100644 --- a/drivers/gpu/drm/xe/xe_sched_job.c +++ b/drivers/gpu/drm/xe/xe_sched_job.c @@ -171,12 +171,13 @@ void xe_sched_job_destroy(struct kref *ref) struct xe_sched_job *job = container_of(ref, struct xe_sched_job, refcount); struct xe_device *xe = job_to_xe(job); + struct xe_exec_queue *q = job->q; xe_sched_job_free_fences(job); - xe_exec_queue_put(job->q); dma_fence_put(job->fence); drm_sched_job_cleanup(&job->drm); job_free(job); + xe_exec_queue_put(q); xe_pm_runtime_put(xe); } -- 2.49.0