[cgutman] 52746: [RTL] - Fix a couple of potential null pointer accesses

Author: cgutman
Date: Wed Jul 20 18:38:13 2011
New Revision: 52746

URL: http://svn.reactos.org/svn/reactos?rev=52746&view=rev
Log:
[RTL]
- Fix a couple of potential null pointer accesses

Modified:
    trunk/reactos/lib/rtl/path.c

Modified: trunk/reactos/lib/rtl/path.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/path.c?rev=52746&am...
==============================================================================
--- trunk/reactos/lib/rtl/path.c [iso-8859-1] (original)
+++ trunk/reactos/lib/rtl/path.c [iso-8859-1] Wed Jul 20 18:38:13 2011
@@ -210,6 +210,9 @@
     Path = PathString->Buffer;
     Chars = PathString->Length / sizeof(WCHAR);

+    /* Return if there are no characters */
+    if (!Chars) return RtlPathTypeUnknown;
+
     /*
      * The algorithm is similar to RtlDetermineDosPathNameType_U but here we
      * actually check for the path length before touching the characters
@@ -291,7 +294,8 @@

/* Handle initial path type and failure case */
     *PathType = RtlPathTypeUnknown;
-    if (!(Size) || !(Buffer) || !(FileName) || (FileName->Buffer[0] == UNICODE_NULL)) return 0;
+    if (!(Size) || !(Buffer) || !(FileName) ||
+        !(FileName->Length) || (FileName->Buffer[0] == UNICODE_NULL)) return 0;

/* Break filename into component parts */
     FileNameBuffer = FileName->Buffer;