linux-kernel - Re: [PATCH net-next] mptcp: fix for setting remote ipv4mapped address

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Message-ID: <20250115132142.53db10b2@kernel.org>
Date: Wed, 15 Jan 2025 13:21:42 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
Cc: mptcp@...ts.linux.dev, Mat Martineau <martineau@...nel.org>, Geliang
 Tang <geliang@...nel.org>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Simon
 Horman <horms@...nel.org>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] mptcp: fix for setting remote ipv4mapped
 address

On Tue, 14 Jan 2025 19:06:22 +0100 Matthieu Baerts (NGI0) wrote:
> From: Geliang Tang <tanggeliang@...inos.cn>
> 
> Commit 1c670b39cec7 ("mptcp: change local addr type of subflow_destroy")
> introduced a bug in mptcp_pm_nl_subflow_destroy_doit().
> 
> ipv6_addr_set_v4mapped() should be called to set the remote ipv4 address
> 'addr_r.addr.s_addr' to the remote ipv6 address 'addr_r.addr6', not
> 'addr_l.addr.addr6', which is the local ipv6 address.

Wasn't there a syzbot report for this? Just curious.