CVE-2023-53116

In the Linux kernel, the following vulnerability has been resolved:

nvmet: avoid potential UAF in nvmetreqcomplete()

An nvme target ->queueresponse() operation implementation may free the request passed as argument. Such implementation potentially could result in a use after free of the request pointer when percpurefput() is called in nvmetreq_complete().

Avoid such problem by using a local variable to save the sq pointer before calling _nvmetreq_complete(), thus avoiding dereferencing the req pointer after that function call.