[PATCH] drm/amdgpu: fix use-after-free issue

[Jack Xiao]

Delete fence fallback timer to fix the ramdom
use-after-free issue.

Signed-off-by: Jack Xiao <Jack.Xiao at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 06f0a6534a94..93ab9faa2d72 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -390,6 +390,7 @@ void amdgpu_ring_fini(struct amdgpu_ring *ring)
 				      &ring->gpu_addr,
 				      (void **)&ring->ring);
 	} else {
+		del_timer_sync(&ring->fence_drv.fallback_timer);
 		kfree(ring->fence_drv.fences);
 	}
 
-- 
2.41.0