drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

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This issue takes place in an error path in
amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into
default case, the function simply returns -EINVAL, forgetting to
decrement the reference count of a dma_fence obj, which is bumped
earlier by amdgpu_cs_get_fence(). This may result in reference count
leaks.

Fix it by decreasing the refcount of specific object before returning
the error code.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Xin Xiong <xiongx18@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Xin Xiong 2022-01-21 15:46:23 -05:00 • committed by Alex Deucher

parent 0fc2549d55

commit dfced44f12

1 changed files with 1 additions and 0 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

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