drm/amdgpu: add missing NULL check

commit ff89f064dca38e2203790bf876cc7756b8ab2961 upstream.

bo->tbo.resource can easily be NULL here.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2902
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 93207badf83f39ba8ae96779110a2f45b91dc5bc..6dcd7bab42fbb2c0a0c0e2448a203ce5ccbc4216 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -220,7 +220,7 @@ static inline bool amdgpu_bo_in_cpu_visible_vram(struct amdgpu_bo *bo)
        struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
        struct amdgpu_res_cursor cursor;
 
-       if (bo->tbo.resource->mem_type != TTM_PL_VRAM)
+       if (!bo->tbo.resource || bo->tbo.resource->mem_type != TTM_PL_VRAM)
                return false;
 
        amdgpu_res_first(bo->tbo.resource, 0, amdgpu_bo_size(bo), &cursor);