[PATCH 2/2] ntoskrnl.exe: Don't try to copy back data in buffered mode when we don't expect any in process_ioctl.

[Christian Costa]

In that cas out_buff is NULL. The driver don't even update out data size (irp.IoStatus.Information) in my case.
---
 dlls/ntoskrnl.exe/ntoskrnl.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 3c5dd62..8481e2b 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -197,7 +197,8 @@ 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;