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, URIBL_BLOCKED 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 5952ECA9EAE for ; Tue, 29 Oct 2019 08:36:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2F1D52054F for ; Tue, 29 Oct 2019 08:36:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729720AbfJ2IgH (ORCPT ); Tue, 29 Oct 2019 04:36:07 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:47985 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729286AbfJ2IgG (ORCPT ); Tue, 29 Oct 2019 04:36:06 -0400 Received: by mail-io1-f71.google.com with SMTP id r84so10555233ior.14 for ; Tue, 29 Oct 2019 01:36:06 -0700 (PDT) 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=cw6cok1K17kDzbl+jeM+X/kALvXMwvoSlXYp5f7esrs=; b=log4+nbQ+bWfbyRzrS8MY9vF3rJXy7d2MVosyL9KbqMX5LP7hZFcK+TRRcCmKp5U+T DfwqwfKpP9BBMPdblepAvLJCHCf6Ntn5q+91UQdpbn/zZ/f/kXOZgYrMORXY1qu1tWyM JIIrhMchEjSixJED7w0iItejiCkRqWAhxYxrge47PEmRIgvBbm13KQ7mVSFhEK8/6QpM aeg5VziFXbBUnWs6MqhKSvglMXrXJ8iOtqMrxmdzjsmKvjTERJlG3CvtFuio6x2cQgoS Bh5N7J6LUco6lXNVY4CRQ7SB36XA620JUSpo8AcYy3Pzyz3RZILzmCWLZaobSq1PVcB5 CDMA== X-Gm-Message-State: APjAAAUQvF2c3COEEqbtIcPun1g07poVYFqWzFhnTZOr2sAvo3bYQwAP 3btXp2VnwtRrLpC1E9XalW6/dy26FDJOdbeOPC8il1irjBmp X-Google-Smtp-Source: APXvYqx8tJ7rkDhUNSoMTNMjB0yHs96gPAyCaHWhA8L952o958ZmrxoUQNx+nf8qU8tnTuT4NH3iN+86HFUmmgLqrC9MNMq0vidS MIME-Version: 1.0 X-Received: by 2002:a92:1696:: with SMTP id 22mr24696502ilw.243.1572338165821; Tue, 29 Oct 2019 01:36:05 -0700 (PDT) Date: Tue, 29 Oct 2019 01:36:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d73b12059608812b@google.com> Subject: WARNING in print_bfs_bug From: syzbot To: ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, f.fainelli@gmail.com, hawk@kernel.org, idosch@mellanox.com, jakub.kicinski@netronome.com, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, linux-kernel@vger.kernel.org, mkubecek@suse.cz, netdev@vger.kernel.org, petrm@mellanox.com, roopa@cumulusnetworks.com, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes 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: 65921376 Merge branch 'net-fix-nested-device-bugs' git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=13ee0a97600000 kernel config: https://syzkaller.appspot.com/x/.config?x=e0ac4d9b35046343 dashboard link: https://syzkaller.appspot.com/bug?extid=62ebe501c1ce9a91f68c 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+62ebe501c1ce9a91f68c@syzkaller.appspotmail.com ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 0 PID: 27915 at kernel/locking/lockdep.c:1696 print_bfs_bug+0x5c/0x80 kernel/locking/lockdep.c:1696 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 27915 Comm: syz-executor.1 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028 RIP: 0010:print_bfs_bug+0x5c/0x80 kernel/locking/lockdep.c:1696 Code: 07 00 74 2d 48 c7 c7 00 5f aa 8a c6 07 00 0f 1f 40 00 85 db 75 05 5b 41 5c 5d c3 44 89 e6 48 c7 c7 e0 17 ac 87 e8 cc e0 eb ff <0f> 0b 5b 41 5c 5d c3 0f 0b 48 c7 c7 d8 1f f3 88 e8 bf fc 55 00 eb RSP: 0018:ffff88801a307688 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 00000000000135ee RSI: ffffffff815cb646 RDI: ffffed1003460ec3 RBP: ffff88801a307698 R08: ffff88809b026340 R09: ffffed1015d04101 R10: ffffed1015d04100 R11: ffff8880ae820807 R12: 00000000ffffffff R13: ffff88809b026bd8 R14: ffff88801a307710 R15: 00000000000003b0 check_path+0x36/0x40 kernel/locking/lockdep.c:1772 check_noncircular+0x16d/0x3e0 kernel/locking/lockdep.c:1797 check_prev_add kernel/locking/lockdep.c:2476 [inline] check_prevs_add kernel/locking/lockdep.c:2581 [inline] validate_chain kernel/locking/lockdep.c:2971 [inline] __lock_acquire+0x2596/0x4a00 kernel/locking/lockdep.c:3955 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x156/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 vlan_ioctl_handler+0xd2/0xf93 net/8021q/vlan.c:554 sock_ioctl+0x518/0x790 net/socket.c:1147 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459f39 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f81d8fbec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459f39 RDX: 0000000020000000 RSI: 0800000000008982 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f81d8fbf6d4 R13: 00000000004c1521 R14: 00000000004d4dc0 R15: 00000000ffffffff 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.