[Python-checkins] bpo-38822: Check specifically for a drive, not just a colon (GH-25540)

[zooba]

https://github.com/python/cpython/commit/9f0b3a9c8eedf694377d8638365fb9f385daa581
commit: 9f0b3a9c8eedf694377d8638365fb9f385daa581
branch: 3.8
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: zooba <steve.dower at microsoft.com>
date: 2021-04-23T00:48:42+01:00
summary:

bpo-38822: Check specifically for a drive, not just a colon (GH-25540)

(cherry picked from commit e07d8098892e85ecc56969d2c9a5afb3ea33ce8f)

Co-authored-by: Steve Dower <steve.dower at python.org>

files:
M Modules/posixmodule.c

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index e821f1a59bde8..d7edabe5da08d 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -1660,8 +1660,8 @@ attributes_from_dir(LPCWSTR pszFile, BY_HANDLE_FILE_INFORMATION *info, ULONG *re
         while (--n > 0 && (filename[n] == L'\\' || filename[n] == L'/')) {
             ((LPWSTR)filename)[n] = L'\0';
         }
-        if (!n || filename[n] == L':') {
-            // Nothing left te query
+        if (!n || (n == 1 && filename[1] == L':')) {
+            // Nothing left to query
             free((void *)filename);
             return FALSE;
         }