CVE-2023-53557 fprobe: Release rethook after the ftrace_ops is unregistered

In the Linux kernel, the following vulnerability has been resolved: fprobe: Release rethook after the ftraceops is unregistered While running bpf selftests it's possible to get following fault: general protection fault, probably for non-canonical address \ 0x6b6b6b6b6b6b6b6b: 0000 1 PREEMPT SMP...