[UDFS]
authorPierre Schweitzer <pierre@reactos.org>
Sun, 4 Jun 2017 16:59:25 +0000 (16:59 +0000)
committerPierre Schweitzer <pierre@reactos.org>
Sun, 4 Jun 2017 16:59:25 +0000 (16:59 +0000)
Fix broken implementation of UDFGetFullNameInformation().
Always return full name length so that caller can allocate a big-enough buffer for later call.

CORE-4375

svn path=/trunk/; revision=74914

reactos/drivers/filesystems/udfs/fileinfo.cpp

index a4dadde..fa6b3e1 100644 (file)
@@ -831,20 +831,22 @@ UDFGetFullNameInformation(
  IN OUT PLONG                      PtrReturnedLength
     )
 {
+    ULONG BytesToCopy;
     NTSTATUS RC = STATUS_SUCCESS;
 
 
     AdPrint(("UDFGetFullNameInformation\n"));
 
     PtrBuffer->FileNameLength = FileObject->FileName.Length;
+    BytesToCopy = FileObject->FileName.Length;
 
     if (PtrBuffer->FileNameLength + sizeof( ULONG ) > (ULONG)(*PtrReturnedLength)) {
 
-        PtrBuffer->FileNameLength = *PtrReturnedLength - sizeof( ULONG );
+        BytesToCopy = *PtrReturnedLength - sizeof( ULONG );
         RC = STATUS_BUFFER_OVERFLOW;
     }
 
-    RtlCopyMemory( PtrBuffer->FileName, FileObject->FileName.Buffer, PtrBuffer->FileNameLength );
+    RtlCopyMemory( PtrBuffer->FileName, FileObject->FileName.Buffer, BytesToCopy );
 
     //  Reduce the available bytes by the amount stored into this buffer.
     *PtrReturnedLength -= sizeof( ULONG ) + PtrBuffer->FileNameLength;