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>
---
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..c85bb313e6df 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1420,6 +1420,8 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
if (IS_ERR(fence))
return PTR_ERR(fence);
+ if (!fence)
+ return -EINVAL;
switch (info->in.what) {
case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
--
2.15.1
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