Unchecked function return value

[Loganaden Velvindron <logan%elandsys.com@localhost>]

Hi All,

In ip6_input.c:

in6_setscope() returns 0 on success.

This was checked at other places:

  472         if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
  473             in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
  474                 IP6_STATINC(IP6_STAT_BADSCOPE);
  475                 goto bad;
  476         }
  477 

Index: src/sys/netinet6/ip6_input.c
===================================================================
RCS file: /cvsroot/src/sys/netinet6/ip6_input.c,v
retrieving revision 1.143
diff -u -p -r1.143 ip6_input.c
--- src/sys/netinet6/ip6_input.c        29 Jun 2013 21:06:58 -0000      1.143
+++ src/sys/netinet6/ip6_input.c        4 Oct 2013 06:19:52 -0000
@@ -812,7 +812,9 @@ ip6_setdstifaddr(struct mbuf *m, const s
                struct ip6aux *ip6a;
 
                ip6a = (struct ip6aux *)(mtag + 1);
-               in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id);
+               if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, 
&ip6a->ip6a_scope_id)) {
+                       return NULL;
+               }
                ip6a->ip6a_src = ia->ia_addr.sin6_addr;
                ip6a->ip6a_flags = ia->ia6_flags;
        }