Author: np
Date: Thu Jan 21 10:12:21 2010
New Revision: 202739
URL: http://svn.freebsd.org/changeset/base/202739
Log:
MFC r201416:
Avoid NULL dereference in arpresolve.
Requested by: kib@
Modified:
stable/8/sys/netinet/if_ether.c
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
stable/8/sys/dev/xen/xenpci/ (props changed)
Modified: stable/8/sys/netinet/if_ether.c
==============================================================================
--- stable/8/sys/netinet/if_ether.c Thu Jan 21 10:09:19 2010
(r202738)
+++ stable/8/sys/netinet/if_ether.c Thu Jan 21 10:12:21 2010
(r202739)
@@ -366,8 +366,8 @@ retry:
if (la->la_asked < V_arp_maxtries)
error = EWOULDBLOCK; /* First request. */
else
- error =
- (rt0->rt_flags & RTF_GATEWAY) ? EHOSTUNREACH :
EHOSTDOWN;
+ error = rt0 != NULL && (rt0->rt_flags & RTF_GATEWAY) ?
+ EHOSTUNREACH : EHOSTDOWN;
if (renew) {
LLE_ADDREF(la);
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