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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2023-10-31 13:30:00 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-11-10 11:33:28 -0500 |
| commit | 256503071c2de2b5b5c20e06654aa9a44f13aa62 (patch) | |
| tree | 3ecae0f50ca30e7812239dbafc7c595e3e21303f | |
| parent | 037b98a2312e2587163de14afae8ae1b64b67dda (diff) | |
| download | lwn-256503071c2de2b5b5c20e06654aa9a44f13aa62.tar.gz lwn-256503071c2de2b5b5c20e06654aa9a44f13aa62.zip | |
drm/amdgpu: Fix possible null pointer dereference
mem = bo->tbo.resource may be NULL in amdgpu_vm_bo_update.
Fixes: 180253782038 ("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>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 904252456d25..100497cb19e6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -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; } |