xen/xenbus: don't let xenbusgrantring() remove grants in error case
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 v4.14.271 by commit 67d21d5bddef88c1977378e4aca2b9c6a4af9edc. For more details please see the references link.