Fix out-of-bounds error when incorporating email from stdin

[mmh] / sbr / concat.c

diff --git a/sbr/concat.c b/sbr/concat.c
index 4c3fcff..9efe731 100644 (file)
--- a/sbr/concat.c
+++ b/sbr/concat.c
@@ -9,6 +9,18 @@
 
 #include <h/mh.h>
 #include <h/utils.h>
+#include <stdarg.h>
+
+
+static char *
+copy(char *from, char *to)
+{
+        while ((*to = *from)) {
+                to++;
+                from++;
+        }
+        return (to);
+}
 
 
 char *
@@ -24,7 +36,7 @@ concat(char *s1, ...)
                len += strlen(cp);
        va_end(list);
 
-       dp = sp = mh_xmalloc(len);
+       dp = sp = mh_xcalloc(len, sizeof(char));
 
        sp = copy(s1, sp);