D28160.diff
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	Index: sys/netipsec/ipsec_output.c
	===================================================================
	--- sys/netipsec/ipsec_output.c
	+++ sys/netipsec/ipsec_output.c
	@@ -323,14 +323,22 @@
	* this is done in the normal processing path.
	*/
	if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
	+ m = mb_unmapped_to_ext(m);
	+ if (m == NULL) {
	+ IPSECSTAT_INC(ips_out_nomem);
	+ return (ENOBUFS);
	+ }
	in_delayed_cksum(m);
	m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
	}
	#if defined(SCTP) \|\| defined(SCTP_SUPPORT)
	if (m->m_pkthdr.csum_flags & CSUM_SCTP) {
	- struct ip ip = mtod(m, struct ip );
	-
	- sctp_delayed_cksum(m, (uint32_t)(ip->ip_hl << 2));
	+ m = mb_unmapped_to_ext(m);
	+ if (m == NULL) {
	+ IPSECSTAT_INC(ips_out_nomem);
	+ return (ENOBUFS);
	+ }
	+ sctp_delayed_cksum(m, mtod(m, struct ip *)->ip_hl << 2);
	m->m_pkthdr.csum_flags &= ~CSUM_SCTP;
	}
	#endif