linux-kernel - [PATCH net 7/7] mptcp: avoid setting TCP

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Message-Id: <20230227-upstream-net-20230227-mptcp-fixes-v1-7-070e30ae4a8e@tessares.net>
Date:   Mon, 27 Feb 2023 18:29:30 +0100
From:   Matthieu Baerts <matthieu.baerts@...sares.net>
To:     mptcp@...ts.linux.dev, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Menglong Dong <imagedong@...cent.com>,
        Mengen Sun <mengensun@...cent.com>,
        Shuah Khan <shuah@...nel.org>, Florian Westphal <fw@...len.de>,
        Jiang Biao <benbjiang@...cent.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        stable@...r.kernel.org
Subject: [PATCH net 7/7] mptcp: avoid setting TCP_CLOSE state twice

tcp_set_state() is called from tcp_done() already.

There is then no need to first set the state to TCP_CLOSE, then call
tcp_done().

Fixes: d582484726c4 ("mptcp: fix fallback for MP_JOIN subflows")
Cc: stable@...r.kernel.org
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/362
Acked-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@...sares.net>
---
 net/mptcp/subflow.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index f6b4511b09b0..b865ba911bc4 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -406,7 +406,6 @@ void mptcp_subflow_reset(struct sock *ssk)
 	/* must hold: tcp_done() could drop last reference on parent */
 	sock_hold(sk);
 
-	tcp_set_state(ssk, TCP_CLOSE);
 	tcp_send_active_reset(ssk, GFP_ATOMIC);
 	tcp_done(ssk);
 	if (!test_and_set_bit(MPTCP_WORK_CLOSE_SUBFLOW, &mptcp_sk(sk)->flags) &&

-- 
2.38.1