On 2018年11月22日 14:56, Sharma, Deepak wrote:
when returned fence is not valid mostly due to userspace ignored
previous error causes NULL pointer dereference.
Signed-off-by: Deepak Sharma <Deepak.Sharma@xxxxxxx>
Reviewed-by: Chunming Zhou <david1.zhou@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 024dfbd87f11..14166cd8a12f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1403,6 +1403,8 @@ static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
fence = amdgpu_ctx_get_fence(ctx, entity, user->seq_no);
amdgpu_ctx_put(ctx);
+ if(!fence)
+ return ERR_PTR(-EINVAL);
return fence;
}
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