From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f69.google.com (mail-oo1-f69.google.com [209.85.161.69]) (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 46C16302163 for ; Wed, 18 Feb 2026 12:26:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771417592; cv=none; b=MARfVkRIRA6sqm3jsTMN5a4X5I0S41ONXmKzXSXfMFsYbY/lDMM7rAxnVUp7HWWH8RxEO77vHxSLPqWNPrPStBMzpQ1/Nv2fRJ0vKTelQ9BBx9rWY1x1tAkoHF8570Tf1S8adCYGlVUqaJ2ya1h+6bcmisIoxQ4VKx1Dmlc6okQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771417592; c=relaxed/simple; bh=tR+orXm+QpSEbpPmDkmO5MhxYeOlH5Awe1VFFJj+aLk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Ph+gzU9JtwK0hzXFVsfCNRqhYmWS+InqIDk6enuu4kdRrgGfpeFic1IaQ2O5yl+M9PzV0uNwDVaAZPq8sL/LgtTpgQhJdH/T8cxTlpaA+0Blieuppm1ZU0yNlWb7qC0EFN+To5miwbrNlEHpn8HrdI4qyeNnwgMRo4SSnVHR6TQ= 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=209.85.161.69 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-oo1-f69.google.com with SMTP id 006d021491bc7-67951b29107so31242771eaf.2 for ; Wed, 18 Feb 2026 04:26:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771417590; x=1772022390; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=MpnbwtwHTnmSiRy508Y4HKeHxUD2rHJYwm+SdOQF/PM=; b=aNFED62s+9HTS9RQEUQz0mnK6KN9f7Qfa14ZmpVQREjwZLQ3O5UdcGO6xxP5zDG2OL XqW+oo6CuR23oBW19HuMykw8k4kd+fE/sWnxMGp43yCkZ/5fCiKCM5TH0/E26UTSN30b ikYL2b3+QodixIgGf1MVN7e4iHHZk0QbZB4MAxd/XpvTFdn7zfiSN2XNaA5STfPU7+yQ WzMZ2WdaQ8AsbVSI1NbngA2o8sZN3Ix89/eOqqj1rin8cONr0tVUN+/T79aN7Sg7eWIk jAVhgKFTgNaKXipvrxrCbv+haEP576QAGS8RaQ/wN5C+xOFHofq842npiZH9We40UY0i NT+A== X-Forwarded-Encrypted: i=1; AJvYcCXsbGQzdxPHemBWU85QbuENXFklxLIeSwW9+ANvbGir4IMgAdCT7NDcrXfoWyMZ+cFpOV5TLrk=@vger.kernel.org X-Gm-Message-State: AOJu0YyIU0shi24avg25CowyjFk/RdJBOBJdwcmqMiFJA+xXkTvxB6eA f9EIb58QSfgNjrCR0dhVDvj5HUcxU+4yBwOy6uLsRoYRJZWRgF5FXVJNr3ajm86T925kNomtl6V K2+mzNiSE/JHnCGiKkFLqYmhYauL++NAE6m2VZO9Ec8lcQSsL91U8IZ6pkO4= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4912:b0:677:5e0a:a92d with SMTP id 006d021491bc7-679a7487a67mr691583eaf.73.1771417590173; Wed, 18 Feb 2026 04:26:30 -0800 (PST) Date: Wed, 18 Feb 2026 04:26:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6995aff6.050a0220.2eeac1.014e.GAE@google.com> Subject: [syzbot] [net?] WARNING in ops_undo_list From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, 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: 77c5e3fdd279 Merge branch 'selftests-forwarding-fix-br_net.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=14b07652580000 kernel config: https://syzkaller.appspot.com/x/.config?x=17f5c46dd78c01cf dashboard link: https://syzkaller.appspot.com/bug?extid=5a287bcdc08104bc3132 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/90a57d114c3a/disk-77c5e3fd.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f0cb3d6cda5d/vmlinux-77c5e3fd.xz kernel image: https://storage.googleapis.com/syzbot-assets/ad4ef00f313f/bzImage-77c5e3fd.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5a287bcdc08104bc3132@syzkaller.appspotmail.com ip6erspan0 (unregistering): left allmulticast mode bond7 (unregistering): (slave ip6gretap1): Releasing active interface bond12 (unregistering): (slave geneve2): Releasing active interface bond0 (unregistering): Released all slaves bond1 (unregistering): Error: No native XDP support for the current bonding mode ------------[ cut here ]------------ dev_xdp_install(dev, mode, bpf_op, NULL, 0, NULL) WARNING: net/core/dev.c:10361 at dev_xdp_uninstall net/core/dev.c:10361 [inline], CPU#0: kworker/u8:22/11031 WARNING: net/core/dev.c:10361 at unregister_netdevice_many_notify+0x1efd/0x2370 net/core/dev.c:12393, CPU#0: kworker/u8:22/11031 Modules linked in: CPU: 0 UID: 0 PID: 11031 Comm: kworker/u8:22 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: netns cleanup_net RIP: 0010:dev_xdp_uninstall net/core/dev.c:10361 [inline] RIP: 0010:unregister_netdevice_many_notify+0x1efd/0x2370 net/core/dev.c:12393 Code: 0f b9 3a e9 00 ff ff ff e8 50 51 52 f8 90 0f 0b 90 e9 1d ff ff ff e8 42 51 52 f8 90 0f 0b 90 e9 a0 f3 ff ff e8 34 51 52 f8 90 <0f> 0b 90 e9 f1 f4 ff ff e8 26 51 52 f8 90 0f 0b 90 e9 4e f6 ff ff RSP: 0018:ffffc90003b2f7c0 EFLAGS: 00010293 RAX: ffffffff8971e99c RBX: ffff888052f84c40 RCX: ffff88807896bc80 RDX: 0000000000000000 RSI: 00000000ffffffa1 RDI: 0000000000000000 RBP: ffffc90003b2f930 R08: ffffc90003b2f207 R09: 1ffff92000765e40 R10: dffffc0000000000 R11: fffff52000765e41 R12: 00000000ffffffa1 R13: ffff888052f84c38 R14: 1ffff1100a5f0988 R15: ffffc9000df67000 FS: 0000000000000000(0000) GS:ffff8881254ae000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f60871d5d58 CR3: 000000006c41c000 CR4: 00000000003526f0 Call Trace: ops_exit_rtnl_list net/core/net_namespace.c:187 [inline] ops_undo_list+0x3d3/0x940 net/core/net_namespace.c:248 cleanup_net+0x56b/0x800 net/core/net_namespace.c:704 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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