[4/5] make NtWriteFile explicitly check for negative offset and fail. Resend.

[Dmitry Timoshkov]

Currently it relies on pwrite to fail if negative offset is passed.
---
 dlls/ntdll/file.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dlls/ntdll/file.c b/dlls/ntdll/file.c
index 76a1a09..b9f875a 100644
--- a/dlls/ntdll/file.c
+++ b/dlls/ntdll/file.c
@@ -984,6 +984,11 @@ NTSTATUS WINAPI NtWriteFile(HANDLE hFile, HANDLE hEvent,
         }
         else if (off == (off_t)-2 /* FILE_USE_FILE_POINTER_POSITION */)
             off = lseek( unix_handle, 0, SEEK_CUR );
+        else if (off < 0)
+        {
+            status = STATUS_INVALID_PARAMETER;
+            goto done;
+        }
 
         /* async I/O doesn't make sense on regular files */
         while ((result = pwrite( unix_handle, buffer, length, off )) == -1)
-- 
1.8.3.4