ntdll: Make NtWriteFile explicitly check for negative offset and fail.

b314a253 · Dmitry Timoshkov · Alexandre Julliard · 9e50cc54 · b314a253
Commit b314a253 authored Sep 13, 2013 by Dmitry Timoshkov Committed by Alexandre Julliard Sep 13, 2013
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file.c dlls/ntdll/file.c +5 -0

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--- a/dlls/ntdll/file.c
+++ b/dlls/ntdll/file.c
@@ -982,6 +982,11 @@ NTSTATUS WINAPI NtWriteFile(HANDLE hFile, HANDLE hEvent,
                }
                off = st.st_size;
            }
+            else if (offset->QuadPart < 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)