Bug#345159: nstxd segfaults on "normal" DNS traffic

[christian mock]

Package: nstx
Version: 1.1-beta6-3
Tags: patch

nstxd is dying with SEGV when it receives "normal" (i.e. non-nstx) 
DNS traffic (can be tested e.g. with fpdns); this comes from freeing
a the NULL pointer "buf" (which is malloced in some code paths,
but not in all); patch attached.

cm.

-- 
Hat irgendwer schlechte Schwingungen in seiner globalen
Eierkuchen-Aura bekommen weil man ihm gesagt hat er soll bitte nicht
andauernd mit Vollquotes in 10 Gruppen gleichzeitig crossposten?
 Albert Koellner in at.usenet

--- nstx-1.1-beta6/nstx_dns.c   2005-12-29 13:38:11.000000000 +0100
+++ nstx-1.1-beta6.patched/nstx_dns.c   2005-12-28 20:52:51.000000000 +0100
@@ -105,8 +105,10 @@
         ptr += chunklen + 1;
       }
    }
-   buf[buflen] = 0;
-   buflen++;
+   if(buf) {
+      buf[buflen] = 0;
+      buflen++;
+   }
    return buf;
 }