From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8BBF92BB09 for ; Fri, 13 Sep 2024 02:49:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726195767; cv=none; b=kKypYFpqit2u6Z8m1JnXtLMWOOxlcT+8iBsWfE5gtGcLy/p7Z5de85mIOzYCKxpf53DouZkpvjxyZD/2+fDBTUfoLSP9fZQpS3vhbTlD9WtBTyyY70GPMRsdjPlXVvavwlvxBaCqeSZ1R70EXE3/SG/IYu65BAFnRNID18nGsj4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726195767; c=relaxed/simple; bh=x0KX85Eni+Rh0AeFH72GXX5ZhraHqy9hmgGncDVv670=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Ssu8MjO/kP3lPzX3mROK5TwaSb7n7aUbj5XZT5r0BS+wSB9N0Cy3DHdwWEzPeY+i8LcNhOL9yu8kEpA5sozyQ3qrP/1OoB3w02s+2aDMOhxxm6PRM7IXsAIReEVvN5XynGhxOAqzbNfFP0z9nJUbDqeSSoTJXgG9Irq0wvhdLSw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f200.google.com with SMTP id e9e14a558f8ab-3a04c905651so4599305ab.2 for ; Thu, 12 Sep 2024 19:49:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726195764; x=1726800564; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=jylXtxP5F5Cw039rfiu+ue6c4TyiJIjw+s934NPOJXs=; b=ObY+U7NrDH1cvvXGbvQTunYxcXafiow4ZpdTDd7+c38UTPE7krjF7nbj+SFE/RwyCk a6fMGDvVzMQVp8hy5kqNJSjKJ9DdWxykUdgjlRPpWYJ+7OXoPIiClthzBelgSRlgNCN2 LtZO9bbQxc8+EbUUGwFoRhKDrJTLDu0J2aPN5rlrnFAeZcM/schRCzKygNfu3c1qzH3Z 9gOYyZ5xbeR8l0gXtMnjarYIhXSV9AUBdhXpJ2lO1o6V4V3NDN9EdyzS1dVueRBscuHk GU+MmX1soTx5CKN7sro0b7SW91y4SvLPJcE0QSerWGnXChmRAc1FV6MPKh5cuI39dGKB u1gw== X-Forwarded-Encrypted: i=1; AJvYcCVx5O2soVXVQJG+7K7QrUY3lWQH0MZBbvkWf5ZRK7Xux5S1hEUQTrB1YPXlYydYLdgfzUAZ3+I=@vger.kernel.org X-Gm-Message-State: AOJu0Yx5nPJOt7Qfz2opKde9bprk3luoUPrQCTbhboUr/8KWfCBksKgg M7Uk4cLHOFy48bBml0dSF1v6znMv3k9IYGdwlWGRMYC4fxU0u1mDdhBktJ/cMxH2HoeRvpIEoVO d+c8HzjBxneu4R+Ik45nGHi9TRZ6daZdsKwMSvLWiCxTSAZ1mgEY+/xA= X-Google-Smtp-Source: AGHT+IEMwLeBLn/bi1hN9EaKEyCRvg7Lt9GQuvkQvyAiSzkZf2HaVtbmBgbaTOWMgTrIWFo6OCpUCj70YNfh+u+LtnUHeVzU6uGV Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20c6:b0:3a0:4b2d:6a7c with SMTP id e9e14a558f8ab-3a08b78971dmr11417985ab.20.1726195764038; Thu, 12 Sep 2024 19:49:24 -0700 (PDT) Date: Thu, 12 Sep 2024 19:49:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000005423e30621f745ff@google.com> Subject: [syzbot] [net?] WARNING in l2tp_exit_net From: syzbot To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f3b6129b7d25 Merge branch '100GbE' of git://git.kernel.org.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=144ba477980000 kernel config: https://syzkaller.appspot.com/x/.config?x=37742f4fda0d1b09 dashboard link: https://syzkaller.appspot.com/bug?extid=332fe1e67018625f63c9 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a742e7b2e0d2/disk-f3b6129b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6982186745fb/vmlinux-f3b6129b.xz kernel image: https://storage.googleapis.com/syzbot-assets/5fd38b217bb5/bzImage-f3b6129b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+332fe1e67018625f63c9@syzkaller.appspotmail.com bond0 (unregistering): (slave dummy0): Releasing backup interface bond0 (unregistering): Released all slaves tipc: Disabling bearer tipc: Disabling bearer tipc: Left network mode ------------[ cut here ]------------ WARNING: CPU: 0 PID: 17026 at net/l2tp/l2tp_core.c:1881 l2tp_exit_net+0x165/0x170 net/l2tp/l2tp_core.c:1881 Modules linked in: CPU: 0 UID: 0 PID: 17026 Comm: kworker/u8:36 Not tainted 6.11.0-rc6-syzkaller-01324-gf3b6129b7d25 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: netns cleanup_net RIP: 0010:l2tp_exit_net+0x165/0x170 net/l2tp/l2tp_core.c:1881 Code: 0f 0b 90 e9 3b ff ff ff e8 48 a4 b0 f6 eb 05 e8 41 a4 b0 f6 90 0f 0b 90 e9 7a ff ff ff e8 33 a4 b0 f6 eb 05 e8 2c a4 b0 f6 90 <0f> 0b 90 eb b5 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000ae07a98 EFLAGS: 00010293 RAX: ffffffff8ae2e87d RBX: ffff8880797c0888 RCX: ffff88806dbbda00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffffc9000ae07bb0 R08: ffffffff8bb2ce16 R09: 1ffffffff2031025 R10: dffffc0000000000 R11: fffffbfff2031026 R12: dffffc0000000000 R13: 1ffffffff1fd274c R14: ffff8880797c0930 R15: ffff8880797c0840 FS: 0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3831d6 CR3: 000000000e734000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x802/0xcc0 net/core/net_namespace.c:626 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd10 kernel/workqueue.c:3389 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup