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$NetBSD: patch-ac,v 1.1 2009/08/15 06:01:13 snj Exp $
--- net.c.orig 2009-08-14 22:29:07.000000000 -0700
+++ net.c 2009-08-14 22:30:17.000000000 -0700
@@ -91,7 +91,7 @@ client has: sender_server 1, recipient m
r=p[8]+(p[9]<<8)+(p[10]<<16)+(p[11]<<24);
mem_free(p);
if (retval==-1)return -1;
- if (crc!=crc32(packet,retval-12))return -1;
+ if (retval < 12 || crc!=crc32(packet,retval-12))return -1;
if (r!=recipient)return -1;
if (sender_server&&s)return -1;
return retval-12;
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