netdev - [PATCH net 1/3] tcp: fix off-by-one bug on aborting window-probing socket

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Message-Id: <20181129000645.163425-2-ycheng@google.com>
Date:   Wed, 28 Nov 2018 16:06:43 -0800
From:   Yuchung Cheng <ycheng@...gle.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, ncardwell@...gle.com,
        Yuchung Cheng <ycheng@...gle.com>
Subject: [PATCH net 1/3] tcp: fix off-by-one bug on aborting window-probing socket

Previously there is an off-by-one bug on determining when to abort
a stalled window-probing socket. This patch fixes that so it is
consistent with tcp_write_timeout().

Signed-off-by: Yuchung Cheng <ycheng@...gle.com>
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: Neal Cardwell <ncardwell@...gle.com>
---
 net/ipv4/tcp_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 5f8b6d3cd855..94d858c604f6 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -376,7 +376,7 @@ static void tcp_probe_timer(struct sock *sk)
 			return;
 	}
 
-	if (icsk->icsk_probes_out > max_probes) {
+	if (icsk->icsk_probes_out >= max_probes) {
 abort:		tcp_write_err(sk);
 	} else {
 		/* Only send another probe if we didn't close things up. */
-- 
2.20.0.rc0.387.gc7a69e6b6c-goog