diff options
| author |   mpi <mpi@openbsd.org> | 2015-11-21 11:23:07 +0000 |
|---|---|---|
| committer | mpi <mpi@openbsd.org> | 2015-11-21 11:23:07 +0000 |
| commit | d082851a7c2cea78a7a735005f6fd25c3ff59ba4 (patch) | |
| tree | 1076dc479a5987fa2990ddd8bd12560681764844 /sys/netinet6/icmp6.c | |
| parent | Prevent disabling vmm mode if a VM is still running. (diff) | |
| download | wireguard-openbsd-d082851a7c2cea78a7a735005f6fd25c3ff59ba4.tar.xz wireguard-openbsd-d082851a7c2cea78a7a735005f6fd25c3ff59ba4.zip | |
Use if_get() rather than dereferencing rt_ifp directly.
ok sthen@, visa@, sashan@, florian@
Diffstat (limited to 'sys/netinet6/icmp6.c')
| -rw-r--r-- | sys/netinet6/icmp6.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/sys/netinet6/icmp6.c b/sys/netinet6/icmp6.c index 90405ccb4c9..01613b8e320 100644 --- a/sys/netinet6/icmp6.c +++ b/sys/netinet6/icmp6.c @@ -1,4 +1,4 @@ -/* $OpenBSD: icmp6.c,v 1.177 2015/11/03 21:39:34 chl Exp $ */ +/* $OpenBSD: icmp6.c,v 1.178 2015/11/21 11:23:07 mpi Exp $ */ /* $KAME: icmp6.c,v 1.217 2001/06/20 15:03:29 jinmei Exp $ */ /* @@ -1018,16 +1018,19 @@ icmp6_mtudisc_update(struct ip6ctlparam *ip6cp, int validated) rt = icmp6_mtudisc_clone(sin6tosa(&sin6), m->m_pkthdr.ph_rtableid); - if (rt && (rt->rt_flags & RTF_HOST) && + if (rt != NULL && ISSET(rt->rt_flags, RTF_HOST) && !(rt->rt_rmx.rmx_locks & RTV_MTU) && (rt->rt_rmx.rmx_mtu > mtu || rt->rt_rmx.rmx_mtu == 0)) { - if (mtu < rt->rt_ifp->if_mtu) { + struct ifnet *ifp; + + ifp = if_get(rt->rt_ifidx); + if (ifp != NULL && mtu < ifp->if_mtu) { icmp6stat.icp6s_pmtuchg++; rt->rt_rmx.rmx_mtu = mtu; } + if_put(ifp); } - if (rt) - rtfree(rt); + rtfree(rt); /* * Notify protocols that the MTU for this destination @@ -1549,7 +1552,7 @@ icmp6_redirect_input(struct mbuf *m, int off) void icmp6_redirect_output(struct mbuf *m0, struct rtentry *rt) { - struct ifnet *ifp; /* my outgoing interface */ + struct ifnet *ifp = NULL; struct in6_addr *ifp_ll6; struct in6_addr *nexthop; struct ip6_hdr *sip6; /* m0 as struct ip6_hdr */ @@ -1569,7 +1572,10 @@ icmp6_redirect_output(struct mbuf *m0, struct rtentry *rt) /* sanity check */ if (m0 == NULL || !rtisvalid(rt)) goto fail; - ifp = rt->rt_ifp; + + ifp = if_get(rt->rt_ifidx); + if (ifp == NULL) + goto fail; /* * Address check: @@ -1795,9 +1801,11 @@ noredhdropt: icmp6stat.icp6s_outhist[ND_REDIRECT]++; + if_put(ifp); return; fail: + if_put(ifp); m_freem(m); m_freem(m0); } |