2 files changed, 6 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 0d30d1bc6a..9c1914d18e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 Wed Sep  5 22:02:27 2007  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
+	* array.c (rb_ary_fill): need integer overflow check.
+	  [ruby-dev:31738]
+
 	* string.c (rb_str_splice): integer overflow for length.
 	  [ruby-dev:31739]
 
diff --git a/array.c b/array.c
index 0ead0812fb..bb793278a2 100644
--- a/array.c
+++ b/array.c
@@ -2264,6 +2264,9 @@ rb_ary_fill(argc, argv, ary)
     }
     rb_ary_modify(ary);
     end = beg + len;
+    if (end < 0) {
+	rb_raise(rb_eArgError, "argument too big");
+    }
     if (end > RARRAY(ary)->len) {
 	if (end >= RARRAY(ary)->aux.capa) {
 	    REALLOC_N(RARRAY(ary)->ptr, VALUE, end);