GSD-2021-1002757 btrfs: fix memory leak in __add_inode_ref()

btrfs: fix memory leak in addinoderef This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.11 by commit 493ff661d434d6bdf02e3a21adae04d7a0b4265...