Mercurial > cpython-lru_cache-weakref

diff Python/ast.c @ 48330:ac854cde3135

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Merged revisions 64114 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r64114 | gregory.p.smith | 2008-06-11 09:41:16 +0200 (mer., 11 juin 2008) | 6 lines Merge in release25-maint r60793: Added checks for integer overflows, contributed by Google. Some are only available if asserts are left in the code, in cases where they can't be triggered from Python code. ........
author Amaury Forgeot d'Arc <amauryfa@gmail.com>
date Wed, 18 Jun 2008 00:47:36 +0000
parents 23ab586c427a
children 42309437f1ca
line wrap: on
line diff
--- a/Python/ast.c	Tue Jun 17 23:16:28 2008 +0000
+++ b/Python/ast.c	Wed Jun 18 00:47:36 2008 +0000
@@ -3145,6 +3145,9 @@
         buf = (char *)s;
         u = NULL;
     } else {
+        /* check for integer overflow */
+        if (len > PY_SIZE_MAX / 4)
+            return NULL;
         /* "\XX" may become "\u005c\uHHLL" (12 bytes) */
         u = PyBytes_FromStringAndSize((char *)NULL, len * 4);
         if (u == NULL)