CVE-2022-50086 block: don't allow the same type rq_qos add more than once

In the Linux kernel, the following vulnerability has been resolved: block: don't allow the same type rqqos add more than once In our test of iocost, we encountered some list add/del corruptions of innerwalk list in ioctimerfn. The reason can be described as follows: cpu 0 cpu 1 iocqoswrite...

GSD-2022-1005181 block: don't allow the same type rq_qos add more than once

block: don't allow the same type rqqos add more than once 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 v5.19.2 by commit...