blk-mq: fix possible memleak when register 'hctx' failed
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 v5.15.86 by commit eff45bfbc25a2509a6362dea6e699e14083c693c. For more details please see the references link.