Christian Costa : ntoskrnl.exe: Don' t try to copy back data in buffered mode when we don' t expect any in process_ioctl.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 6643f07d2bf8df70490fe6692de1bdf356b4db1e
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=6643f07d2bf8df70490fe6692de1bdf356b4db1e

Author: Christian Costa <titan.costa at gmail.com>
Date:   Wed Oct  3 08:55:14 2012 +0200

ntoskrnl.exe: Don't try to copy back data in buffered mode when we don't expect any in process_ioctl.

---

 dlls/ntoskrnl.exe/ntoskrnl.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 06993ee..03e932c 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -197,7 +197,7 @@ static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff,
     *out_size = (irp.IoStatus.u.Status >= 0) ? irp.IoStatus.Information : 0;
     if ((code & 3) == METHOD_BUFFERED)
     {
-        memcpy( out_buff, irp.AssociatedIrp.SystemBuffer, *out_size );
+        if (out_buff) memcpy( out_buff, irp.AssociatedIrp.SystemBuffer, *out_size );
         HeapFree( GetProcessHeap(), 0, irp.AssociatedIrp.SystemBuffer );
     }
     return irp.IoStatus.u.Status;