From 43f189b0032fbce67fc0c0f4e122e917cd232670 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20B=C3=ADlka?= <neleai@seznam.cz>
Date: Sat, 11 Jul 2015 17:44:10 +0200
Subject: [PATCH 37/65] Handle overflow in __hcreate_r

Hi,

As in bugzilla entry there is overflow in hsearch when looking for prime
number as SIZE_MAX - 1 is divisible by 5. We fix that by rejecting large
inputs before looking for prime.

	* misc/hsearch_r.c (__hcreate_r): Handle overflow.

(cherry picked from commit 2f5c1750558fe64bac361f52d6827ab1bcfe52bc)
---
 ChangeLog        | 5 +++++
 misc/hsearch_r.c | 9 ++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 9740c89..e818995 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-08-25  Ondřej Bílka  <neleai@seznam.cz>
+
+	[BZ #18240]
+	* misc/hsearch_r.c (__hcreate_r): Handle overflow.
+
 2015-10-27  Ludovic Courtès  <ludo@gnu.org>
 
 	* locale/loadlocale.c (_nl_intern_locale_data): Change assertion
diff --git a/misc/hsearch_r.c b/misc/hsearch_r.c
index 9f55e84..559df29 100644
--- a/misc/hsearch_r.c
+++ b/misc/hsearch_r.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include <malloc.h>
 #include <string.h>
-
+#include <stdint.h>
 #include <search.h>
 
 /* [Aho,Sethi,Ullman] Compilers: Principles, Techniques and Tools, 1986
@@ -73,6 +73,13 @@ __hcreate_r (nel, htab)
       return 0;
     }
 
+  if (nel >= SIZE_MAX / sizeof (_ENTRY))
+    {
+      __set_errno (ENOMEM);
+      return 0;
+    }
+
+
   /* There is still another table active. Return with error. */
   if (htab->table != NULL)
     return 0;
-- 
2.7.4