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-rw-r--r--sys/netinet/tcp_subr.c2
-rw-r--r--sys/netinet/tcp_timewait.c2
2 files changed, 4 insertions, 0 deletions
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c
index f960fc4..fb6bd8be 100644
--- a/sys/netinet/tcp_subr.c
+++ b/sys/netinet/tcp_subr.c
@@ -347,6 +347,8 @@ tcp_respond(tp, ipgen, th, m, ack, seq, flags)
#endif /* INET6 */
int ipflags = 0;
+ KASSERT(tp != NULL || m != NULL, ("tcp_respond: tp and m both NULL"));
+
#ifdef INET6
isipv6 = IP_VHL_V(((struct ip *)ipgen)->ip_vhl) == 6;
ip6 = ipgen;
diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c
index f960fc4..fb6bd8be 100644
--- a/sys/netinet/tcp_timewait.c
+++ b/sys/netinet/tcp_timewait.c
@@ -347,6 +347,8 @@ tcp_respond(tp, ipgen, th, m, ack, seq, flags)
#endif /* INET6 */
int ipflags = 0;
+ KASSERT(tp != NULL || m != NULL, ("tcp_respond: tp and m both NULL"));
+
#ifdef INET6
isipv6 = IP_VHL_V(((struct ip *)ipgen)->ip_vhl) == 6;
ip6 = ipgen;
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