diff --git a/src/sys/fsctl.c b/src/sys/fsctl.c
index 676b0731..6bab9dd9 100644
--- a/src/sys/fsctl.c
+++ b/src/sys/fsctl.c
@@ -134,12 +134,16 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
 
     if (IsWrite)
     {
-        if (0 == InputBuffer || 0 == InputBufferLength ||
-            0 != OutputBuffer || 0 != OutputBufferLength ||
-            FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMAX - (FileNode->FileName.Length + sizeof(WCHAR)) <
-                InputBufferLength)
+        if (0 == InputBuffer || 0 == InputBufferLength)
+            return STATUS_INVALID_BUFFER_SIZE;
+
+        if (0 != OutputBuffer || 0 != OutputBufferLength)
             return STATUS_INVALID_PARAMETER;
 
+        if (FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMAX - (FileNode->FileName.Length + sizeof(WCHAR)) <
+                InputBufferLength)
+            return STATUS_IO_REPARSE_DATA_INVALID;
+
         Result = FsRtlValidateReparsePointBuffer(InputBufferLength, InputBuffer);
         if (!NT_SUCCESS(Result))
             return Result;