devname is passed to scanf which will fill in a string of up
to 20 bytes + trailing '\0'. So make devname 21 bytes long accordingly.

Index: heartbeat-ipv6addr/resources/OCF/IPv6addr.c
===================================================================
--- heartbeat-ipv6addr.orig/resources/OCF/IPv6addr.c    2007-04-13 
15:47:41.000000000 +0900
+++ heartbeat-ipv6addr/resources/OCF/IPv6addr.c 2007-04-13 15:51:04.000000000 
+0900
@@ -433,7 +433,7 @@
 {
        FILE *f;
        char addr6[40];
-       static char devname[20]="";
+       static char devname[21]="";
        struct in6_addr addr;
        struct in6_addr mask;
        unsigned int plen, scope, dad_status, if_idx;

--

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/

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