MFC r344103:
In r335015 PCB destroing was made deferred using epoch_call(). But ipsec_delete_pcbpolicy() uses some VNET-virtualized variables, and thus it needs VNET context, that is missing during gtaskqueue executing. Use inp_vnet context to set curvnet in in_pcbfree_deferred(). PR: [[ https://bugs.freebsd.org/235684 | 235684 ]]