From 141b9912e80a92faa6fd57ba037c062c69707892 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
 <marmarek@invisiblethingslab.com>
Date: Mon, 20 Nov 2017 13:58:39 +0100
Subject: [PATCH] Initialize pad field in filecopy final response

Do not leak 4 bytes from the receiver stack.

Reported by @cfcs
---
 qrexec-lib/unpack.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/qrexec-lib/unpack.c b/qrexec-lib/unpack.c
index c7513e8..171885a 100644
--- a/qrexec-lib/unpack.c
+++ b/qrexec-lib/unpack.c
@@ -77,6 +77,7 @@ void send_status_and_crc(int code, const char *last_filename) {
 
     saved_errno = errno;
     hdr.error_code = code;
+    hdr._pad = 0;
     hdr.crc32 = crc32_sum;
     if (!write_all(1, &hdr, sizeof(hdr)))
         perror("write status");