Check that rt_mask(rt) is non-NULL before dereferencing it, in the

RTM_ADD case, thus avoiding a panic. Submitted by: Iasen Kostov
2004-10-26 03:31:58 +00:00 · 2004-10-26 03:31:58 +00:00 · d6fa5d2806
commit d6fa5d2806
parent b0258eb606
1 changed files with 1 additions and 0 deletions
--- a/sys/netinet/if_ether.c
+++ b/sys/netinet/if_ether.c
@ -178,6 +178,7 @@ arp_rtrequest(req, rt, info)
 		 * restore cloning bit.
 		 */
 		if ((rt->rt_flags & RTF_HOST) == 0 &&
+		    rt_mask(rt) != NULL &&
 		    SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff)
 			rt->rt_flags |= RTF_CLONING;
 		if (rt->rt_flags & RTF_CLONING) {