netdev - [PATCH] mptcp: fix uninit-value in mptcp_incoming

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Date: Thu, 23 Nov 2023 09:23:39 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+b834a6b2decad004cfa1@...kaller.appspotmail.com
Cc: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	linux-kernel@...r.kernel.org,
	martineau@...nel.org,
	matthieu.baerts@...sares.net,
	matttbe@...nel.org,
	mptcp@...ts.linux.dev,
	netdev@...r.kernel.org,
	pabeni@...hat.com,
	syzkaller-bugs@...glegroups.com
Subject: [PATCH] mptcp: fix uninit-value in mptcp_incoming_options

Added initialization use_ack to mptcp_parse_option().

Reported-by: syzbot+b834a6b2decad004cfa1@...kaller.appspotmail.com
Signed-off-by: Edward Adam Davis <eadavis@...com>
---
 net/mptcp/options.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index cd15ec73073e..c53914012d01 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -108,6 +108,7 @@ 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;
 		}
-- 
2.25.1