Author: glebius
Date: Wed Jul 9 07:48:05 2014
New Revision: 268450
URL: http://svnweb.freebsd.org/changeset/base/268450
Log:
In several cases in ip_output() we obtain reference on ifa. Do not
leak it.
Together with: asomers, np
Sponsored by: Nginx, Inc.
Modified:
head/sys/netinet/ip_output.c
Modified: head/sys/netinet/ip_output.c
==============================================================================
--- head/sys/netinet/ip_output.c Wed Jul 9 05:51:59 2014
(r268449)
+++ head/sys/netinet/ip_output.c Wed Jul 9 07:48:05 2014
(r268450)
@@ -136,6 +136,7 @@ ip_output(struct mbuf *m, struct mbuf *o
struct rtentry *rte; /* cache for ro->ro_rt */
struct in_addr odst;
struct m_tag *fwd_tag = NULL;
+ int have_ia_ref;
#ifdef IPSEC
int no_route_but_check_spd = 0;
#endif
@@ -202,6 +203,7 @@ ip_output(struct mbuf *m, struct mbuf *o
gw = dst = (struct sockaddr_in *)&ro->ro_dst;
again:
ia = NULL;
+ have_ia_ref = 0;
/*
* If there is a cached route, check that it is to the same
* destination and is still up. If not, free it and try again.
@@ -238,6 +240,7 @@ again:
error = ENETUNREACH;
goto bad;
}
+ have_ia_ref = 1;
ip->ip_dst.s_addr = INADDR_BROADCAST;
dst->sin_addr = ip->ip_dst;
ifp = ia->ia_ifp;
@@ -250,6 +253,7 @@ again:
error = ENETUNREACH;
goto bad;
}
+ have_ia_ref = 1;
ifp = ia->ia_ifp;
ip->ip_ttl = 1;
isbroadcast = in_broadcast(dst->sin_addr, ifp);
@@ -261,6 +265,8 @@ again:
*/
ifp = imo->imo_multicast_ifp;
IFP_TO_IA(ifp, ia);
+ if (ia)
+ have_ia_ref = 1;
isbroadcast = 0; /* fool gcc */
} else {
/*
@@ -552,8 +558,11 @@ sendit:
#endif
error = netisr_queue(NETISR_IP, m);
goto done;
- } else
+ } else {
+ if (have_ia_ref)
+ ifa_free(&ia->ia_ifa);
goto again; /* Redo the routing table lookup. */
+ }
}
/* See if local, if yes, send it to netisr with IP_FASTFWD_OURS. */
@@ -582,6 +591,8 @@ sendit:
m->m_flags |= M_SKIP_FIREWALL;
m->m_flags &= ~M_IP_NEXTHOP;
m_tag_delete(m, fwd_tag);
+ if (have_ia_ref)
+ ifa_free(&ia->ia_ifa);
goto again;
}
@@ -694,6 +705,8 @@ passout:
done:
if (ro == &iproute)
RO_RTFREE(ro);
+ if (have_ia_ref)
+ ifa_free(&ia->ia_ifa);
return (error);
bad:
m_freem(m);
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
