avoid segfault (NULL pointer deref)

diff --git a/print-domain.c b/print-domain.c
index ed78574746c60fa619f81bf997c280421de2f331..1e7ea33131b50b18834e72db285f08c5af585e00 100644 (file)
--- a/print-domain.c
+++ b/print-domain.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.62 2000-12-31 07:12:18 itojun Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.63 2001-01-01 04:22:56 itojun Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -650,11 +650,15 @@ ns_print(register const u_char *bp, u_int length)
                if (qdcount--) {
                        cp = ns_qprint((const u_char *)(np + 1),
                                       (const u_char *)np);
+                       if (!cp)
+                               goto trunc;
                        if ((cp = ns_rprint(cp, bp)) == NULL)
                                goto trunc;
                        while (qdcount-- && cp < snapend) {
                                cp = ns_qprint((const u_char *)cp,
                                               (const u_char *)np);
+                               if (!cp)
+                                       goto trunc;
                                if ((cp = ns_rprint(cp, bp)) == NULL)
                                        goto trunc;
                        }