From d0bd2170bd06942f355771b4d52ebe95cca294b5 Mon Sep 17 00:00:00 2001
From: Bill Zissimopoulos <billziss@navimatics.com>
Date: Tue, 28 Jul 2026 19:02:09 +0300
Subject: [PATCH] dll: FspCreateDirectoryFileW: handle trailing backslash

Fixes #674
---
 src/dll/util.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/dll/util.c b/src/dll/util.c
index 8ac7f784..2fee90e9 100644
--- a/src/dll/util.c
+++ b/src/dll/util.c
@@ -127,6 +127,11 @@ HANDLE FspCreateDirectoryFileW(
     Length = GetFullPathNameW(FileName, Length + 1, FullFileName, &FilePart);
     if (0 == Length)
         goto exit;
+    if (0 == FilePart)
+    {
+        SetLastError(ERROR_INVALID_NAME);
+        goto exit;
+    }
 
     FilePartChar = *FilePart;
     *FilePart = L'\0';