CVE-2023-52983

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bic_set_bfqq() After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"),bic->bfqq will be accessed in bic_set_bfqq(), however, in some contextbic->bfqq will be freed, and b...