Commit 25650307 authored by Felix Kuehling's avatar Felix Kuehling Committed by Alex Deucher
Browse files

drm/amdgpu: Fix possible null pointer dereference 



mem = bo->tbo.resource may be NULL in amdgpu_vm_bo_update.

Fixes: 18025378 ("drm/ttm: stop allocating dummy resources during BO creation")
Signed-off-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 037b98a2

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

+2 −2
Original line number Diff line number Diff line
@@ -1098,8 +1098,8 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va, 
				bo = gem_to_amdgpu_bo(gobj);

		}

		mem = bo->tbo.resource;

		if (mem->mem_type == TTM_PL_TT ||

		    mem->mem_type == AMDGPU_PL_PREEMPT)

		if (mem && (mem->mem_type == TTM_PL_TT ||

			    mem->mem_type == AMDGPU_PL_PREEMPT))

			pages_addr = bo->tbo.ttm->dma_address;

	}