From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Tue, 11 May 2021 14:47:17 +0000 (+0200)
Subject: conn: windows: set count=0 on retry
X-Git-Tag: 0.0.20211016~30
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5846b622837e04dbc35b153d9ceda7fd66397520;p=thirdparty%2Fwireguard-go.git

conn: windows: set count=0 on retry

When retrying, if count is not 0, we forget to dequeue another request,
and so the ring fills up and errors out.

Reported-by: Sascha Dierberg <dierberg@dresearch-fe.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---

diff --git a/conn/bind_windows.go b/conn/bind_windows.go
index 42208b1..d744987 100644
--- a/conn/bind_windows.go
+++ b/conn/bind_windows.go
@@ -357,6 +357,7 @@ func (bind *afWinRingBind) Receive(buf []byte, isOpen *uint32) (int, Endpoint, e
 	var count uint32
 	var results [1]winrio.Result
 retry:
+	count = 0
 	for tries := 0; count == 0 && tries < receiveSpins; tries++ {
 		if tries > 0 {
 			if atomic.LoadUint32(isOpen) != 1 {