btrfs: fix ulist leaks in error paths of qgroup self tests
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 v4.14.299 by commit 3f58283d83a588ff5da62fc150de19e798ed2ec2, it was introduced in version v4.2 by commit 442244c9633292a147ab2b29e7007a7c8a3909b2. For more details please see the references link.