From: Chris Hofstaedtler <chris.hofstaedtler@deduktiva.com>
Date: Mon, 27 Nov 2017 14:32:05 +0000 (+0100)
Subject: sdig: avoid segfault when ednssubnet is given with no arg
X-Git-Tag: dnsdist-1.3.0~152^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f359e10f6799d0ba99abdd760ae28b46e409230f;p=thirdparty%2Fpdns.git

sdig: avoid segfault when ednssubnet is given with no arg
---

diff --git a/pdns/sdig.cc b/pdns/sdig.cc
index bcd2bbeb0c..61a954a595 100644
--- a/pdns/sdig.cc
+++ b/pdns/sdig.cc
@@ -71,7 +71,12 @@ try
       if (strcmp(argv[i], "tcp") == 0)
         tcp=true;
       if (strcmp(argv[i], "ednssubnet") == 0) {
-        ednsnm=Netmask(argv[++i]);
+        i++;
+        if (argc == i) {
+          usage();
+          exit(EXIT_FAILURE);
+        }
+        ednsnm=Netmask(argv[i]);
       }
     }
   }