From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93DE8C33C9E for ; Thu, 30 Jan 2020 10:14:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 72A09206D5 for ; Thu, 30 Jan 2020 10:14:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726947AbgA3KON (ORCPT ); Thu, 30 Jan 2020 05:14:13 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:40463 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726895AbgA3KON (ORCPT ); Thu, 30 Jan 2020 05:14:13 -0500 Received: by mail-io1-f72.google.com with SMTP id m24so1621451iol.7 for ; Thu, 30 Jan 2020 02:14:12 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=t4vo0u6KTxFmuW+mHcgJMo7mTce20UYxGm5eCY798RA=; b=DuWszW6vbt5gWwNCTCB5+P4ClxK/qHQLuZkp4xDSBvHSB/QORq7CWMPI8sqUtGACaQ 7PZJol/P9DBBOK2zAco85LjZzRj+PPTPt1ksCtGUoiWgTdVufqCf0423QR95bQMOzIOf EVl030XSa1hR6+VfwLQo23fKSnw4PPR2W89DaQwvxGUnOxY5Gz+373BkCTqs+0tLA4uV cLBWdST2FHXhrFE+ND5/bzppEhZox58pJzCBkwftPAx3soHEPNawsOulVp4a3TAY6q9Q jr/Ko//onn1MSKFkvsFuNuuHKxfEkjKMc1rWM83TmTGoquhdEveof3KAdpppt6gTLiwh 6Y2g== X-Gm-Message-State: APjAAAUMgQWqnypJEbnlnZpP5LSNGkzE918fSAEWr9gewjt0OjAfCKyi Q0AgBzSkyAndsDxTndrSB++yCmGC9pGYINjNIbU25TDQyk6q X-Google-Smtp-Source: APXvYqyONdgzswDRKfG1rhocXQ7TVEMtch8eeq/tqqhxi82eDLzCNnoaJ2Bd3fTC9XZdSe5R8UP1ZRpOsy1KxhBq992CW6Yxw+1L MIME-Version: 1.0 X-Received: by 2002:a5e:8f41:: with SMTP id x1mr3578346iop.113.1580379252307; Thu, 30 Jan 2020 02:14:12 -0800 (PST) Date: Thu, 30 Jan 2020 02:14:12 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f1bced059d58b712@google.com> Subject: WARNING in default_device_exit_batch From: syzbot To: davem@davemloft.net, dhowells@redhat.com, edumazet@google.com, gnault@redhat.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, nicolas.dichtel@6wind.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 08a45c59 Merge branch 'mptcp-part-two' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1799f721e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=8d2cca7133bc3ccc dashboard link: https://syzkaller.appspot.com/bug?extid=dfdfbdef099aa0f92df1 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+dfdfbdef099aa0f92df1@syzkaller.appspotmail.com bond2 (unregistering): Released all slaves ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7 at net/core/dev.c:8782 rollback_registered_many+0xcca/0x1030 net/core/dev.c:8782 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.5.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:rollback_registered_many+0xcca/0x1030 net/core/dev.c:8782 Code: 6b 1a 00 00 48 c7 c6 40 b7 d6 88 48 c7 c7 20 b8 d6 88 c6 05 03 9f 52 04 01 e8 51 3b 20 fb 0f 0b e9 a1 fd ff ff e8 46 8b 4f fb <0f> 0b e9 76 fd ff ff e8 3a 8b 4f fb 0f 0b e9 af fa ff ff e8 2e 8b RSP: 0018:ffffc90000cdf9c0 EFLAGS: 00010293 RAX: ffff8880a99a81c0 RBX: ffff888057e90000 RCX: ffffffff862571fe RDX: 0000000000000000 RSI: ffffffff8625748a RDI: 0000000000000001 RBP: ffffc90000cdfae8 R08: ffff8880a99a81c0 R09: fffffbfff149c655 R10: fffffbfff149c654 R11: ffffffff8a4e32a7 R12: ffff8880946ee6c0 R13: dffffc0000000000 R14: 00000000a0105a01 R15: ffffc90000cdfac0 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9912 unregister_netdevice_many net/core/dev.c:9911 [inline] default_device_exit_batch+0x360/0x420 net/core/dev.c:10385 ops_exit_list.isra.0+0x10c/0x160 net/core/net_namespace.c:175 cleanup_net+0x549/0xb10 net/core/net_namespace.c:589 process_one_work+0x9af/0x1740 kernel/workqueue.c:2264 worker_thread+0x98/0xe40 kernel/workqueue.c:2410 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.