Mercurial > cpython-lru_cache-weakref

diff Python/ast.c @ 47587:1c964ed35ef9 legacy-trunk

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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 Gregory P. Smith <greg@mad-scientist.com>
date Wed, 11 Jun 2008 07:41:16 +0000
parents 52294af4b663
children 80109d4044cd
line wrap: on
line diff
--- a/Python/ast.c	Wed Jun 11 07:10:43 2008 +0000
+++ b/Python/ast.c	Wed Jun 11 07:41:16 2008 +0000
@@ -3200,6 +3200,9 @@
                 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 = PyString_FromStringAndSize((char *)NULL, len * 4);
                 if (u == NULL)