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smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eoLdi4St; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eoLdi4St" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 444E0C116C6; Fri, 13 Feb 2026 11:01:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770980478; bh=O8wM9o9jaxRKe7Tiam8Z/rkhWEXGulI51Shgv0HO4ns=; h=Date:Subject:To:References:From:Cc:In-Reply-To:From; b=eoLdi4StQSVyv6YfrnOLlPuT6Fv4mfyBPyywLSJDToOzqBDOkYaKIlzrMarvpHtOY Piu/cigMt869GgDsDTd2AF05U8llCsW/73K7Iv8uBpnwKLMFFRzj2crM0R5/FCLUhd HbSC9eegxwnkT84/iH8OfKmBtC3/4wVhDnd8+l6HrUTaZRp2f47BwIjU+UqHBSdgzE 5DHZ+oSNSUzxQtbI+BBgER3dPYWkjE5PKcuwwRFECnX7I7Vq9LA4lH2kwmavk4KEsn /0neDp+CmcQnl/wVTTLubDLSkBQy/Srn/OPHaBuap57aHtUQGqHNRQbrn/UzWoB0wj UocqffkZXeO1g== Message-ID: <12774ad8-6d81-4dc1-b3af-e62f623b467a@kernel.org> Date: Fri, 13 Feb 2026 12:01:15 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Subject: Re: [syzbot] [mptcp?] WARNING in __mptcp_move_skbs_from_subflow (2) Content-Language: en-GB, fr-BE To: syzbot References: <692056f6.a70a0220.2ea503.004e.GAE@google.com> From: Matthieu Baerts Cc: geliang@kernel.org, linux-kernel@vger.kernel.org, martineau@kernel.org, mptcp@lists.linux.dev, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Hello, -cc netdev & maintainers On 21/11/2025 13:11, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: fd95357fd8c6 Merge tag 'sched_ext-for-6.18-rc6-fixes-2' of.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17220e92580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=1cd7f786c0f5182f > dashboard link: https://syzkaller.appspot.com/bug?extid=9475dcc0b42355ded022 > compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > userspace arch: i386 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-fd95357f.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/9301ea2e80a9/vmlinux-fd95357f.xz > kernel image: https://storage.googleapis.com/syzbot-assets/13592a9d2a74/bzImage-fd95357f.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+9475dcc0b42355ded022@syzkaller.appspotmail.com This bug has not been seen for quite a while, and we didn't find anything wrong when looking at the related code. We then think it was induced by a previous memory corruption. It can be re-opened if needed. #syz invalid Ref on our side: https://github.com/multipath-tcp/mptcp_net-next/issues/608 Cheers, Matt -- Sponsored by the NGI0 Core fund.