[PATCH 6.1 091/131] drm/amdgpu: add missing NULL check

Greg Kroah-Hartman
2023-10-16T09:05:04Z

From: Christian König <christian.koenig@amd.com>

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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- 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_visi
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);