commit 9101e23ff6006d9ede7d46e8c9e7d39e23c2a3c3
author Serhiy Storchaka <storchaka@gmail.com> Sat Jan 19 12:41:45 2013 +0200
committer Serhiy Storchaka <storchaka@gmail.com> Sat Jan 19 12:41:45 2013 +0200
tree c61aebdba4dddc8f10c9460ca33b0fa3f2e1495d
parent bd8f29028eab752e8e5c73703218a701028c1a9a
parent 441d30fac7f4037e4a79e4ada873de3b6f6e5a26

Issue #15989: Fix several occurrences of integer overflow
when result of PyLong_AsLong() narrowed to int without checks.

This is a backport of changesets 13e2e44db99d and 525407d89277.

Modules/_io/textio.c

diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index 83437d6..a93049f 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -881,7 +881,7 @@
             }
         }
         else {
-            int fd = (int) PyLong_AsLong(fileno);
+            int fd = _PyLong_AsInt(fileno);
             Py_DECREF(fileno);
             if (fd == -1 && PyErr_Occurred()) {
                 goto error;