block: Fix possible memory leak for rqwb on adddisk failure
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 v6.0.8 by commit 528677d3b4af985445bd4ac667485ded1ed11220, it was introduced in version v5.15 by commit 83cbce9574462c6b4eed6797bdaf18fae6859ab3. For more details please see the references link.