drm/amdgpu/mes: fix use-after-free issue

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

v2: move to amdgpu_mes.c

Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Acked-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
index a00cf4756ad0e2f371742e760183882773a80243..1569bef030eac166ea6194427ca9c8489cc62796 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
@@ -1132,6 +1132,7 @@ void amdgpu_mes_remove_ring(struct amdgpu_device *adev,
                return;
 
        amdgpu_mes_remove_hw_queue(adev, ring->hw_queue_id);
+       del_timer_sync(&ring->fence_drv.fallback_timer);
        amdgpu_ring_fini(ring);
        kfree(ring);
 }