[tfaber] 73921: [KMTESTS:IO] - Avoid a crash in IoFilesystem on Windows when using a free kernel with ntfs. Querying FileAllInformation with any size below sizeof(FILE_ALL_INFORMATION) is considere...

Author: tfaber
Date: Sun Feb 26 11:31:51 2017
New Revision: 73921

URL: http://svn.reactos.org/svn/reactos?rev=73921&view=rev
Log:
[KMTESTS:IO]
- Avoid a crash in IoFilesystem on Windows when using a free kernel with ntfs. Querying FileAllInformation with any size below sizeof(FILE_ALL_INFORMATION) is considered illegal, so only do it on checked builds (which have a size check).

Modified:
    trunk/rostests/kmtests/ntos_io/IoFilesystem.c

Modified: trunk/rostests/kmtests/ntos_io/IoFilesystem.c
URL: http://svn.reactos.org/svn/reactos/trunk/rostests/kmtests/ntos_io/IoFilesyst...
==============================================================================
--- trunk/rostests/kmtests/ntos_io/IoFilesystem.c	[iso-8859-1] (original)
+++ trunk/rostests/kmtests/ntos_io/IoFilesystem.c	[iso-8859-1] Sun Feb 26 11:31:51 2017
@@ -115,13 +115,24 @@
     ok_eq_size(Length, (ULONG_PTR)0x5555555555555555);
     if (FileAllInfo)
         KmtFreeGuarded(FileAllInfo);
+
+    /* No space for the name -- fastfat handles this gracefully, ntfs doesn't.
+     * But the Io manager makes it fail on checked builds, so it's
+     * technically illegal
+     */
+    Length = FIELD_OFFSET(FILE_ALL_INFORMATION, NameInformation.FileName);
+    Status = QueryFileInfo(FileHandle, (PVOID*)&FileAllInfo, &Length, FileAllInformation);
+    ok_eq_hex(Status, STATUS_INFO_LENGTH_MISMATCH);
+    ok_eq_size(Length, (ULONG_PTR)0x5555555555555555);
+    if (FileAllInfo)
+        KmtFreeGuarded(FileAllInfo);
     }

/* The minimum allowed */
-    Length = FIELD_OFFSET(FILE_ALL_INFORMATION, NameInformation.FileName);
+    Length = sizeof(FILE_ALL_INFORMATION);
     Status = QueryFileInfo(FileHandle, (PVOID*)&FileAllInfo, &Length, FileAllInformation);
     ok_eq_hex(Status, STATUS_BUFFER_OVERFLOW);
-    ok_eq_size(Length, FIELD_OFFSET(FILE_ALL_INFORMATION, NameInformation.FileName));
+    ok_eq_size(Length, sizeof(FILE_ALL_INFORMATION));
     if (FileAllInfo)
         KmtFreeGuarded(FileAllInfo);