From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 98644246787 for ; Sun, 4 May 2025 19:10:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746385836; cv=none; b=gZQs2CPInnbkqx4RFyZK0WQ/tbmBywsquFLNd5JEHnRjxB5KNsW8duApdXkH8bm4Z9pd7zWoj0POXrp3oLj1zLQQS3zR96jKlvKaVYWGX34t4XvCGXNcTQe9xOCPpDwF6etV/q51si58qb1G8WI+TO7vv34PZBv5FdIQLDF7sM8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746385836; c=relaxed/simple; bh=vjFaoOvRw1vrMa/9VjFzL1XNP2AXqEAp/jbnc4A5WnE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=WlU2HNHs0y8T7XQgyLyEIzSyVZ+GRXBNn+NguKIF1sEO+kinJj7CBuQNnpbFVYc2gKOfZevWylEvhH7rPpozOMkdIeF446xFeNNGyp/J1cC9qpuc6OkaWvZIGwvEit/4i/xJamqnf+BZtQInT8v45WIIjD/zxDlEBY73LUdgcOY= 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=209.85.166.205 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-f205.google.com with SMTP id e9e14a558f8ab-3d8a9b1c84eso48664285ab.2 for ; Sun, 04 May 2025 12:10:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746385834; x=1746990634; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=YXjH2/nIZgFObFxlaymemrJhwERcHzwr+S1weGC2s40=; b=VWBq8qH1v+SCuyABptX9GSMKpWBXTASfN6+oq3OyItB3YeWxxPS8XKJhXymWqpEUqo 5abmFT/svlRHPeu7PuPkNqV4O1Wga0fAcffbQPhOOv/L4+nZx9UsxCQtr4Yy+LdgF9yk T20/0SmQNjsKUM+Qz/nsyyc90Y/Vc96JRugiYMmEmaxMzaL7VT4FHw6qQmUDLKNd+muK la8SpH8MDOT9nELN9NxAOvpMq+qC6BSJRA6amXrLBXLKHdWneEOs6R309NtR2d7l2yV1 8kbVln9e+yAS9jSz+cRxERr0HTh1F2J9baTd9BruNrIjldFjjD6a6RjPH/SBnWp5t102 /A1A== X-Forwarded-Encrypted: i=1; AJvYcCUCtaMX6F/4cyJV/z9LTMjKLa+uXURJR70Ph2PYzfkdDti50NnTyNcWVZywr+2FYE5WDrHnV+vhi6Nr11Q=@vger.kernel.org X-Gm-Message-State: AOJu0YzicJ3jLUL4hxfMyX3/4x1yyi21O/vA0sVJhXwNGLxo8OWsRLjO zOZ6eD8G/SGfycep9WMWIW1jKpo11fI+EFY9U8TUcGFG8LBb6AyNRDibQ0D5M9L2iyIRyOpL/z8 TVDFDWGdvrizqcWvgn/wEmqmSrmkoA7ZbHznWwlZNBNw5blDH4gY29IM= X-Google-Smtp-Source: AGHT+IEGHAGSBDNNMdyt3lOlnWkJKKQSpukblnhOyv1hILPhcdGjYYox+zKB1++65898j2om5s110sORaVe1oa9OtaH75aLbWERp Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3982:b0:3d8:2032:ca67 with SMTP id e9e14a558f8ab-3da5b2733cemr44891425ab.9.1746385833759; Sun, 04 May 2025 12:10:33 -0700 (PDT) Date: Sun, 04 May 2025 12:10:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6817bba9.050a0220.11da1b.0037.GAE@google.com> Subject: [syzbot] [net?] kernel BUG in unregister_vlan_dev (3) 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: ac9c34d1e45a Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14de1db0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8f2f8fb6ad08b539 dashboard link: https://syzkaller.appspot.com/bug?extid=a8b046e462915c65b10b compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-ac9c34d1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/29bdb2b01967/vmlinux-ac9c34d1.xz kernel image: https://storage.googleapis.com/syzbot-assets/e12977e5724d/bzImage-ac9c34d1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a8b046e462915c65b10b@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at net/8021q/vlan.c:100! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 UID: 0 PID: 1143 Comm: kworker/u32:8 Not tainted 6.14.0-rc4-syzkaller-00052-gac9c34d1e45a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:unregister_vlan_dev+0x4b2/0x590 net/8021q/vlan.c:100 Code: 01 90 ba 61 00 00 00 48 c7 c6 a0 b0 bd 8c 48 c7 c7 e0 b0 bd 8c e8 3e 1d ed f6 90 0f 0b 90 90 e9 ec fb ff ff e8 8f ec 2c f7 90 <0f> 0b e8 27 01 90 f7 e9 ba fb ff ff 4c 89 f7 e8 4a 01 90 f7 e9 4d RSP: 0018:ffffc9000600f9e8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880436c4000 RCX: ffffffff8a8cf212 RDX: ffff888027142440 RSI: ffffffff8a8cf361 RDI: ffff88804b09a428 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000003 R12: ffff88804b09a000 R13: 0000000000000000 R14: ffff88804d8fdd30 R15: ffff88804d8fdac0 FS: 0000000000000000(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005584306fa000 CR3: 0000000024c3e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: default_device_exit_batch+0x778/0xae0 net/core/dev.c:12432 ops_exit_list+0x128/0x180 net/core/net_namespace.c:177 cleanup_net+0x5c6/0xb30 net/core/net_namespace.c:652 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:unregister_vlan_dev+0x4b2/0x590 net/8021q/vlan.c:100 Code: 01 90 ba 61 00 00 00 48 c7 c6 a0 b0 bd 8c 48 c7 c7 e0 b0 bd 8c e8 3e 1d ed f6 90 0f 0b 90 90 e9 ec fb ff ff e8 8f ec 2c f7 90 <0f> 0b e8 27 01 90 f7 e9 ba fb ff ff 4c 89 f7 e8 4a 01 90 f7 e9 4d RSP: 0018:ffffc9000600f9e8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880436c4000 RCX: ffffffff8a8cf212 RDX: ffff888027142440 RSI: ffffffff8a8cf361 RDI: ffff88804b09a428 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000003 R12: ffff88804b09a000 R13: 0000000000000000 R14: ffff88804d8fdd30 R15: ffff88804d8fdac0 FS: 0000000000000000(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1aefd735e8 CR3: 000000004e9dc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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