kernel: calipso: Don't call calipso functions for AF_INET sk.

In the Linux kernel, the following vulnerability has been resolved: calipso: Don't call calipso functions for AFINET sk. syzkaller reported a null-ptr-deref in txoptget. 0 The offset 0x70 was of struct ipv6txoptions in struct ipv6pinfo, so struct ipv6pinfo was NULL there. However, this never...