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spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727544AbeHOXft (ORCPT ); Wed, 15 Aug 2018 19:35:49 -0400 Received: from mail-pl0-f41.google.com ([209.85.160.41]:44663 "EHLO mail-pl0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727448AbeHOXfs (ORCPT ); Wed, 15 Aug 2018 19:35:48 -0400 Received: by mail-pl0-f41.google.com with SMTP id ba4-v6so951978plb.11 for ; Wed, 15 Aug 2018 13:42:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=6eozs9VmxNiI/SR9RljQ6Eo+MYpLqjG9O39InccuD98=; b=YWAXHYr87+HnCtMnD3R2w8agXlPv0rYBVDZDhw01mckuY99K6foJP4dRf99rzkkJSX FtAYAcHStTFI2u/rSy7E9QZFBMpJQ6AMOL/xaAZliiZX/j31cor1ItgRvrZzsgYTvDiA 4svvfWjDXuEqmMvNIEN2109tx0aSX5uyXyBJw0/o/bXPh2c3/mlKsBBKXnost7cPOgXY imhj/hUG8dOMBTPypiO/k3ZwSFkGN+AHOn7Mk5ELpTSvinD+oNrVDHWTtfMTsIguJC43 E6dNSR3uxdYgQDx08B4TtoFOFtrtDq9W+9hf13yOleeU32fZmbhiFmqkn2vR2JVX5wf9 CtOQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=6eozs9VmxNiI/SR9RljQ6Eo+MYpLqjG9O39InccuD98=; b=hrMlLUvHQ00KsIVpb3sPtJs2xEGF5FjtMCbOycfq8ebyPb/kNpVSpVZa1joFBo7Ud5 8Mw4tDUbbxbUuRJw5ipBxJpBWm/vGxNibybykMV6n+EDptUoCn7WYATkL14J84RcAvRu R0YvQegnK6rsIZO3sS/Esjik/OnbpiIsMaPAvfct8nuB4VKcAGJIx+C5jqI6ZvKcH3KR juuoikenbDxxuyGFsx+wTquTcybiFN1NivEqQl9he9UofeOH6BnCW1AIgRKFfs3bXyJW 9/Ri/xu41JJl/MDu6Gxe2ki2S1schXRLoehulTF+DE0LqY7TaO7zNpOxB2ouhs024qd8 Xz1g== X-Gm-Message-State: AOUpUlG850Ap0TGxFV/vlO2u8rU8fWw59NLhFbwmXFN9wx5rWZUgFUwX lNeZjlm4RTJCtZLB3seaBB/5UWydU9zBehThOG+U5g== X-Google-Smtp-Source: AA+uWPzdIWVKyBpx+4HjGH1bINKxNHdmmFY9lLP+ekF1KeeY5mNOzQES9zVdfst72eh4IFIA4Ic8Sz5C9fycVF4870k= X-Received: by 2002:a17:902:d710:: with SMTP id w16-v6mr25699566ply.93.1534365722507; Wed, 15 Aug 2018 13:42:02 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a17:90a:ac14:0:0:0:0 with HTTP; Wed, 15 Aug 2018 13:41:42 -0700 (PDT) In-Reply-To: <000000000000c5b63005737f290d@google.com> References: <00000000000056268e05737dcb95@google.com> <000000000000c5b63005737f290d@google.com> From: Dmitry Vyukov Date: Wed, 15 Aug 2018 13:41:42 -0700 Message-ID: Subject: Re: unregister_netdevice: waiting for DEV to become free (2) To: syzbot Cc: LKML , syzkaller-bugs , netdev , Dan Streetman Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 15, 2018 at 1:28 PM, syzbot wrote: > syzbot has found a reproducer for the following crash on: > > HEAD commit: 31130a16d459 Merge tag 'for-linus-4.19-rc1-tag' of git://g.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1116b46c400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=e8d52931cda051de > dashboard link: https://syzkaller.appspot.com/bug?extid=30209ea299c09d8785c9 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=11617322400000 +netdev and Dan There were more reproducers here: https://groups.google.com/forum/#!msg/syzkaller/-06_laheMF0/MxCjIiHkBwAJ and here: https://groups.google.com/forum/#!msg/syzkaller/-06_laheMF0/4wfWs6ATBwAJ and in the previous incarnation of the bug: https://syzkaller.appspot.com/bug?id=1a97a5bd119fd97995f752819fd87840ab9479a9 > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+30209ea299c09d8785c9@syzkaller.appspotmail.com > > IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered forwarding state > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered forwarding state > unregister_netdevice: waiting for lo to become free. Usage count = 1 > 8021q: adding VLAN 0 to HW filter on device bond0 > IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready > 8021q: adding VLAN 0 to HW filter on device team0 > IPVS: stopping master sync thread 6855 ... > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: stopping master sync thread 6859 ... > IPVS: ftp: loaded support on port[0] = 21 > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered disabled state > device bridge_slave_0 entered promiscuous mode > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered disabled state > device bridge_slave_1 entered promiscuous mode > IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready > bond0: Enslaving bond_slave_0 as an active interface with an up link > bond0: Enslaving bond_slave_1 as an active interface with an up link > IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready > team0: Port device team_slave_0 added > IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready > team0: Port device team_slave_1 added > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered forwarding state > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered forwarding state > 8021q: adding VLAN 0 to HW filter on device bond0 > IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready > 8021q: adding VLAN 0 to HW filter on device team0 > IPVS: stopping master sync thread 7118 ... > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: stopping master sync thread 7122 ... > IPVS: ftp: loaded support on port[0] = 21 > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered disabled state > device bridge_slave_0 entered promiscuous mode > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered disabled state > device bridge_slave_1 entered promiscuous mode > IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready > bond0: Enslaving bond_slave_0 as an active interface with an up link > bond0: Enslaving bond_slave_1 as an active interface with an up link > IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready > team0: Port device team_slave_0 added > IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready > team0: Port device team_slave_1 added > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered forwarding state > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered forwarding state > 8021q: adding VLAN 0 to HW filter on device bond0 > IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready > 8021q: adding VLAN 0 to HW filter on device team0 > IPVS: stopping master sync thread 7381 ... > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: stopping master sync thread 7385 ... > IPVS: ftp: loaded support on port[0] = 21 > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered disabled state > device bridge_slave_0 entered promiscuous mode > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered disabled state > device bridge_slave_1 entered promiscuous mode > IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready > bond0: Enslaving bond_slave_0 as an active interface with an up link > bond0: Enslaving bond_slave_1 as an active interface with an up link > IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready > team0: Port device team_slave_0 added > IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready > team0: Port device team_slave_1 added > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered forwarding state > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered forwarding state > 8021q: adding VLAN 0 to HW filter on device bond0 > IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready > 8021q: adding VLAN 0 to HW filter on device team0 > IPVS: stopping master sync thread 7644 ... > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, > id = 0 > IPVS: stopping master sync thread 7648 ... > IPVS: ftp: loaded support on port[0] = 21 > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered disabled state > device bridge_slave_0 entered promiscuous mode > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered disabled state > device bridge_slave_1 entered promiscuous mode > IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready > IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready > bond0: Enslaving bond_slave_0 as an active interface with an up link > bond0: Enslaving bond_slave_1 as an active interface with an up link > IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready > team0: Port device team_slave_0 added > IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready > team0: Port device team_slave_1 added > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready > IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready > bridge0: port 2(bridge_slave_1) entered blocking state > bridge0: port 2(bridge_slave_1) entered forwarding state > bridge0: port 1(bridge_slave_0) entered blocking state > bridge0: port 1(bridge_slave_0) entered forwarding state > 8021q: adding VLAN 0 to HW filter on device bond0 > IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/000000000000c5b63005737f290d%40google.com. > > For more options, visit https://groups.google.com/d/optout.