From 350147b5cacee7a288875007cddf1f7a321a21e2 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@haypocalc.com>
Date: Sat, 16 Oct 2010 22:52:09 +0000
Subject: [PATCH] _Py_wreadlink(): catch _Py_char2wchar() failure

---
 Python/fileutils.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Python/fileutils.c b/Python/fileutils.c
index cfafd865c54..147636f2c78 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -326,6 +326,10 @@ _Py_wreadlink(const wchar_t *path, wchar_t *buf, size_t bufsiz)
     }
     cbuf[res] = '\0'; /* buf will be null terminated */
     wbuf = _Py_char2wchar(cbuf);
+    if (wbuf == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
     r1 = wcslen(wbuf);
     if (bufsiz <= r1) {
         PyMem_Free(wbuf);