Index: drivers/filesystems/btrfs/reparse.c
===================================================================
--- drivers/filesystems/btrfs/reparse.c	(revision 72017)
+++ drivers/filesystems/btrfs/reparse.c	(working copy)
@@ -243,6 +243,7 @@
 static NTSTATUS set_symlink(PIRP Irp, fcb* fcb, REPARSE_DATA_BUFFER* rdb, ULONG buflen, LIST_ENTRY* rollback) {
     NTSTATUS Status;
     ULONG minlen;
+    ULONG tlength;
     UNICODE_STRING subname;
     ANSI_STRING target;
     KEY searchkey;
@@ -410,7 +411,8 @@
     }
     
     offset.QuadPart = 0;
-    Status = write_file2(fcb->Vcb, Irp, offset, target.Buffer, (ULONG*)&target.Length, Irp->Flags & IRP_PAGING_IO, Irp->Flags & IRP_NOCACHE, rollback);
+    tlength = target.Length;
+    Status = write_file2(fcb->Vcb, Irp, offset, target.Buffer, &tlength, Irp->Flags & IRP_PAGING_IO, Irp->Flags & IRP_NOCACHE, rollback);
     
     ExFreePool(target.Buffer);