compile.c (iseq_set_sequence): check for multiplication overflow

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47292 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Wed Aug 27 07:59:17 2014  Eric Wong  <e@80x24.org>
+
+	* compile.c (iseq_set_sequence): check for multiplication overflow
+
 Tue Aug 26 22:07:42 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* test/ruby/test_complex.rb: cherry-picked working assertions from r47251.

compile.c

@@ -1649,7 +1649,7 @@ iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *anchor)
     iseq->iseq_size = pos;
     iseq->stack_max = stack_max;
 
-    line_info_table = ruby_xrealloc(line_info_table, k * sizeof(struct iseq_line_info_entry));
+    line_info_table = REALLOC_N(line_info_table, struct iseq_line_info_entry, k);
     iseq->line_info_table = line_info_table;
     iseq->line_info_size = k;