diff options
| -rw-r--r-- | sys/net/if_spppsubr.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/net/if_spppsubr.c b/sys/net/if_spppsubr.c index 1c745073c65..c79a8e2f7b9 100644 --- a/sys/net/if_spppsubr.c +++ b/sys/net/if_spppsubr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_spppsubr.c,v 1.167 2017/08/11 13:23:27 reyk Exp $ */ +/* $OpenBSD: if_spppsubr.c,v 1.168 2017/08/11 15:12:32 reyk Exp $ */ /* * Synchronous PPP link level subroutines. * @@ -586,6 +586,9 @@ sppp_output(struct ifnet *ifp, struct mbuf *m, if (dst->sa_family == AF_INET) { struct ip *ip = NULL; + if (m->m_len >= sizeof(struct ip)) + ip = mtod(m, struct ip *); + /* * When using dynamic local IP address assignment by using * 0.0.0.0 as a local address, the first TCP session will |