commit 68c1c398f3534af16309a86ab815b61d2487e6db
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Fri Jun 28 09:23:06 2019 -0700
committer Victor Stinner <vstinner@redhat.com> Fri Jun 28 18:23:06 2019 +0200
tree 451e86328b35ad0ff0e0da07188b79ef223291ca
parent ad00640f936956c3a19834b6cd12b04edf53a776

bpo-37412: Fix os.getcwd() for long path on Windows (GH-14424) (GH-14451)

* Fix test for integer overflow.
* Add an unit test.
(cherry picked from commit ec3e20a2d1edddb0558f9d32e2b367904ccdde88)

Co-authored-by: Victor Stinner <vstinner@redhat.com>

Modules/posixmodule.c

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 4301e87..bceee89 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -3333,7 +3333,7 @@
        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 {