commit ec3e20a2d1edddb0558f9d32e2b367904ccdde88
author Victor Stinner <vstinner@redhat.com> Fri Jun 28 18:01:59 2019 +0200
committer GitHub <noreply@github.com> Fri Jun 28 18:01:59 2019 +0200
tree 4cb63b0ccbaf0d9cbdb0d6257b03b6337ae2823c
parent 3029035ef34c9bae0c8d965290cd9b273c8de1ea

bpo-37412: Fix os.getcwd() for long path on Windows (GH-14424)

* Fix test for integer overflow.
* Add an unit test.

Modules/posixmodule.c

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 197607c..b848710 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -3334,7 +3334,7 @@
        terminating \0. If the buffer is too small, len includes
        the space needed for the terminator. */
     if (len >= Py_ARRAY_LENGTH(wbuf)) {
-        if (len >= PY_SSIZE_T_MAX / sizeof(wchar_t)) {
+        if (len <= PY_SSIZE_T_MAX / sizeof(wchar_t)) {
             wbuf2 = PyMem_RawMalloc(len * sizeof(wchar_t));
         }
         else {