about summary refs log tree commit diff
path: root/misc/hsearch_r.c
diff options
context:
space:
mode:
authorOndřej Bílka <neleai@seznam.cz>2015-07-11 17:44:10 +0200
committerOndřej Bílka <neleai@seznam.cz>2015-08-25 15:08:23 +0200
commit2f5c1750558fe64bac361f52d6827ab1bcfe52bc (patch)
treeb7c2c8d0b85b54bf84228e64f805465cc188d25d /misc/hsearch_r.c
parent0d0325ed4b1052f32069eb3a51f7e16485a73568 (diff)
downloadglibc-2f5c1750558fe64bac361f52d6827ab1bcfe52bc.tar.gz
glibc-2f5c1750558fe64bac361f52d6827ab1bcfe52bc.tar.xz
glibc-2f5c1750558fe64bac361f52d6827ab1bcfe52bc.zip
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.
Diffstat (limited to 'misc/hsearch_r.c')
-rw-r--r--misc/hsearch_r.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/misc/hsearch_r.c b/misc/hsearch_r.c
index 9f55e845cf..559df29cf7 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;