In the Linux kernel, the following vulnerability has been resolved:

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

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.

https://git.kernel.org/stable/c/3edd8646cb7c11b57c90e026bda6f21076223f5b

https://git.kernel.org/stable/c/4009f104b02b223d1a11d74b36b1cc083bc37028

https://git.kernel.org/stable/c/72d77ddb2224ebc00648f4f78f8a9a259dccbdf7

https://git.kernel.org/stable/c/927beb05aaa429c883cc0ec6adc48964b187e291

https://git.kernel.org/stable/c/b6d1f7d97c81ebaf2cda9c4c943ee2e484fffdcf

https://git.kernel.org/stable/c/bc2d5c0775c839e2b072884f4ee6a93ba410f107

https://git.kernel.org/stable/c/dfced44f122c500004a48ecc8db516bb6a295a1b