Description: drm/syncobj: Fix drm_syncobj_handle_to_fd refcount leak
References:
 https://source.android.com/security/bulletin/pixel/2021-06-01
Notes:
Bugs:
upstream: N/A "Vulnerability specific to backport issue to the 4.14.y branch"
5.10-upstream-stable: N/A "Vulnerability specific to backport issue to the 4.14.y branch"
4.19-upstream-stable: N/A "Vulnerability specific to backport issue to the 4.14.y branch"
4.9-upstream-stable: N/A "Vulnerability specific to backport issue to the 4.14.y branch"
sid: N/A "Vulnerability specific to backport issue to the 4.14.y branch"
4.19-buster-security: N/A "Vulnerability specific to backport issue to the 4.14.y branch"
4.9-stretch-security: N/A "Vulnerability specific to backport issue to the 4.14.y branch"