3 files changed, 10 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index 9f8d1e5992..317315da38 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sun Jan 12 15:33:11 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* util.c (ruby_qsort): fix potential stack overflow on a large
+	  machine.  based on the patch by Conrad Irwin <conrad.irwin AT
+	  gmail.com> at [ruby-core:51816].  [Bug #7772]
+
 Sun Jan 12 15:17:00 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/tk/tkutil/tkutil.c: use rb_sprintf(), rb_id2str(), and
diff --git a/util.c b/util.c
index 8ffa24acdc..5bb0c512bf 100644
--- a/util.c
+++ b/util.c
@@ -309,7 +309,9 @@ ruby_qsort(void* base, const size_t nel, const size_t size, cmpfunc_t *cmp, void
   char *L = base;                    	/* left end of current region */
   char *R = (char*)base + size*(nel-1); /* right end of current region */
   size_t chklim = 63;                   /* threshold of ordering element check */
-  stack_node stack[32], *top = stack;   /* 32 is enough for 32bit CPU */
+  enum {size_bits = sizeof(size) * CHAR_BIT};
+  stack_node stack[size_bits];          /* enough for size_t size */
+  stack_node *top = stack;
   int mmkind;
   size_t high, low, n;
 
diff --git a/version.h b/version.h
index 1e1af27f37..7f5487b50d 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.0.0"
 #define RUBY_RELEASE_DATE "2014-01-12"
-#define RUBY_PATCHLEVEL 379
+#define RUBY_PATCHLEVEL 380
 
 #define RUBY_RELEASE_YEAR 2014
 #define RUBY_RELEASE_MONTH 1