linux-kernel - [PATCH AUTOSEL 5.15 04/10] mptcp: fix uninit-value in mptcp_incoming

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Message-ID: <20231204203616.2094529-4-sashal@kernel.org>
Date:   Mon,  4 Dec 2023 15:36:01 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Edward Adam Davis <eadavis@...com>,
        syzbot+b834a6b2decad004cfa1@...kaller.appspotmail.com,
        Paolo Abeni <pabeni@...hat.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, matttbe@...nel.org,
        martineau@...nel.org, edumazet@...gle.com, kuba@...nel.org,
        netdev@...r.kernel.org, mptcp@...ts.linux.dev
Subject: [PATCH AUTOSEL 5.15 04/10] mptcp: fix uninit-value in mptcp_incoming_options

From: Edward Adam Davis <eadavis@...com>

[ Upstream commit 237ff253f2d4f6307b7b20434d7cbcc67693298b ]

Added initialization use_ack to mptcp_parse_option().

Reported-by: syzbot+b834a6b2decad004cfa1@...kaller.appspotmail.com
Signed-off-by: Edward Adam Davis <eadavis@...com>
Acked-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/mptcp/options.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index aa4b0cf7c6380..012e0e352276f 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -103,6 +103,7 @@ static void mptcp_parse_option(const struct sk_buff *skb,
 			mp_opt->suboptions |= OPTION_MPTCP_DSS;
 			mp_opt->use_map = 1;
 			mp_opt->mpc_map = 1;
+			mp_opt->use_ack = 0;
 			mp_opt->data_len = get_unaligned_be16(ptr);
 			ptr += 2;
 		}
-- 
2.42.0