CVE-2022-50654 bpf: Fix panic due to wrong pageattr of im->image

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix panic due to wrong pageattr of im-image In the scenario where livepatch and kretfunc coexist, the pageattr of im-image is rox after archpreparebpftrampoline in bpftrampolineupdate, and then modifyfentry or registerfentry...