block, bfq: fix uaf for bfqq in bfqexiticq_bfqq
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 v5.15.87 by commit 7949b0df3dd9f4817ed4a4e989fa9ee81df6205f, it was introduced in version v5.15.86 by commit 094f3d9314d67691cb21ba091c1b528f6e3c4893. For more details please see the references link.