From: Victor Stinner <victor.stinner@gmail.com>
Date: Mon, 14 Mar 2016 17:07:53 +0000 (+0100)
Subject: posix_getcwd(): limit to INT_MAX on Windows
X-Git-Tag: v3.6.0a1~479
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c44f70770bf629469a5a179b643e53dfeca884ad;p=thirdparty%2FPython%2Fcpython.git

posix_getcwd(): limit to INT_MAX on Windows

It's more to fix a conversion warning during compilation, I don't think that
Windows support current working directory larger than 2 GB ...
---

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 6e0081d0dff0..7e8987845bb6 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -3320,12 +3320,22 @@ posix_getcwd(int use_bytes)
     Py_BEGIN_ALLOW_THREADS
     do {
         buflen += chunk;
+#ifdef MS_WINDOWS
+        if (buflen > INT_MAX) {
+            PyErr_NoMemory();
+            break;
+        }
+#endif
         tmpbuf = PyMem_RawRealloc(buf, buflen);
         if (tmpbuf == NULL)
             break;
 
         buf = tmpbuf;
+#ifdef MS_WINDOWS
+        cwd = getcwd(buf, (int)buflen);
+#else
         cwd = getcwd(buf, buflen);
+#endif
     } while (cwd == NULL && errno == ERANGE);
     Py_END_ALLOW_THREADS