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

jira LE-3201
cve CVE-2024-38581
Rebuild_History Non-Buildable kernel-rt-4.18.0-553.22.1.rt7.363.el8_10
commit-author Jack Xiao <Jack.Xiao@amd.com>
commit 9482552

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>
(cherry picked from commit 9482552)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c

@@ -1083,6 +1083,7 @@ 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);
 }