From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (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 EB5D933F7 for ; Fri, 13 Sep 2024 02:49:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726195766; cv=none; b=j4YHj/vrgKHU9n+bVn5QesYqOb4EnwCFMCgL0Mm/im5jHVzHseU19MmWD95SlV+zLt0uDbjbZ0lsLBWhY0UOKuRTm5pQ+mrfmec2HqCJ9XAg2PcMpJepTcj50oqcrmBGSxitsBj2xqcDDY0A1Mbdp52LkaoFef9me4JewH00ZsI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726195766; c=relaxed/simple; bh=x0KX85Eni+Rh0AeFH72GXX5ZhraHqy9hmgGncDVv670=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=n2++NN1gsWIG0hrX5HBmRL87hIAoqGK+BuoaglGVaBn33iCrOJqXWQIHTZNVdoA7gS455Aeg7kHctdIUPXATu0rXLDCc1gZ1GeL7QZ9402zhg0oStYVlxH04bwCeyCsFgyLrwcXR/hvET70LzT7yoGK9DKQe6gQmMg5YdnTyeWA= 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=209.85.166.198 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-f198.google.com with SMTP id e9e14a558f8ab-3a05311890bso6953285ab.1 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=t22w64/S+rsS73MkNSVB69okkVbo14NOX6n4Du+1ledt25Umqxlbf3/3xyKzlF7sIW +qtN6PuFMScmYQ/akQ4/XAWLHXBLTjBYeUxPBYdcxV1ZLXQnxjqgVIhYTrn1vAIhd2Hr YGsu+mqvgtp1ApG8GCbatZZW86DGCSJwQzffXhsze5osFqeVXfwGSnI2mvYUm12pt3UP ZEWPduD9Tg/3IgKGfCeRmT7kNYX9C9QXz1gnplk2pOPUxSt7qcfk/hBUCrO0zl0q/Y8X ozpEBBDdmDmfFGNmSxBSu7PQzjSLoEqygKEk3UtDcHBvIZUKq7Acxt8Ad/9xNXE4vTdr VvYA== X-Forwarded-Encrypted: i=1; AJvYcCXnMXpfYj6rXef/lECC3TYMCNIGaKpTfVLOy3JdYfW9IdQuWbZmD8erbcbb3WmkuWzwYvUmchWUZUp0mJ8=@vger.kernel.org X-Gm-Message-State: AOJu0YxwMXcCnQ8b+DPbvTkrYbi6MjVlIzzMZhsyWp6eQv2PIzNI85kw Wby+qFKnfMQtIS/Ht4g1q/rPN+7AwEOrhRurzsYyZzeiUI2u9yP9VCbPqEPBwQlVyQ+CFHGhXvx zpKuDwMau+9BDQWf3Mo4pPrSaqZ9ljnIWbBgHzqxxUoaAn0WlcVR/eSA= X-Google-Smtp-Source: AGHT+IEMwLeBLn/bi1hN9EaKEyCRvg7Lt9GQuvkQvyAiSzkZf2HaVtbmBgbaTOWMgTrIWFo6OCpUCj70YNfh+u+LtnUHeVzU6uGV Precedence: bulk X-Mailing-List: linux-kernel@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