CVE-2024-26754 gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp()

In the Linux kernel, the following vulnerability has been resolved: gtp: fix use-after-free and null-ptr-deref in gtpgenldumppdp The gtpnetops pernet operations structure for the subsystem must be registered before registering the generic netlink family. Syzkaller hit 'general protection fault in...