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drm/amdgpu: Fix possible null pointer dereference

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abo->tbo.resource may be NULL in amdgpu_vm_bo_update.

Fixes: 1802537820 ("drm/ttm: stop allocating dummy resources during BO creation")
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Felix Kuehling
2023-10-19 18:56:50 -04:00
committed by Alex Deucher
parent 58720809f5
commit 51b79f3381
1 changed files with 2 additions and 1 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+2 -1
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@@ -1090,7 +1090,8 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va,
struct drm_gem_object *gobj = dma_buf->priv;
struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
if (abo->tbo.resource->mem_type == TTM_PL_VRAM)
if (abo->tbo.resource &&
abo->tbo.resource->mem_type == TTM_PL_VRAM)
bo = gem_to_amdgpu_bo(gobj);
}
mem = bo->tbo.resource;