From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: Re: WARNING in batadv_mcast_mla_tt_retract Date: Sat, 12 Jan 2019 10:11:02 -0800 Message-ID: <0000000000000cb9e2057f46bcb2@google.com> References: <000000000000fa4f60057e499989@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes To: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, davem@davemloft.net, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com Return-path: In-Reply-To: <000000000000fa4f60057e499989@google.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 4b3c31c8d4dd Merge branch 'i2c/for-current' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12fecc7f400000 kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2 dashboard link: https://syzkaller.appspot.com/bug?extid=83f2d54ec6b7e417e13f compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=139c6408c00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+83f2d54ec6b7e417e13f@syzkaller.appspotmail.com IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready 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): veth1_to_team: link is not ready WARNING: CPU: 0 PID: 26 at net/batman-adv/multicast.c:337 batadv_mcast_mla_tt_retract+0x3d7/0x4b0 net/batman-adv/multicast.c:337 kobject: 'lo' (000000007d40203a): kobject_uevent_env Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.0.0-rc1+ #21 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_mcast_mla_update Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 kobject: 'lo' (000000007d40203a): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'queues' (0000000029ca31b3): kobject_add_internal: parent: 'lo', set: '' __warn.cold+0x20/0x48 kernel/panic.c:571 kobject: 'queues' (0000000029ca31b3): kobject_uevent_env report_bug+0x263/0x2b0 lib/bug.c:186 kobject: 'queues' (0000000029ca31b3): kobject_uevent_env: filter function caused the event to drop! fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 kobject: 'rx-0' (00000000a8654327): kobject_add_internal: parent: 'queues', set: 'queues' invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:batadv_mcast_mla_tt_retract+0x3d7/0x4b0 net/batman-adv/multicast.c:337 kobject: 'rx-0' (00000000a8654327): kobject_uevent_env Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 c8 00 00 00 48 81 c4 a0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 29 07 b0 f9 <0f> 0b e9 de fc ff ff e8 9d f2 f3 f9 e9 e3 fd ff ff 48 89 df e8 b0 RSP: 0018:ffff8880a96676b0 EFLAGS: 00010293 RAX: ffff8880a96586c0 RBX: 0000000000000001 RCX: ffffffff87d1ed13 RDX: 0000000000000000 RSI: ffffffff87d1f037 RDI: 0000000000000007 kobject: 'rx-0' (00000000a8654327): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' RBP: ffff8880a9667778 R08: ffff8880a96586c0 R09: 0000000000000003 R10: 0000000000000000 R11: ffff8880ae62dc7b R12: ffff8880a9667868 R13: 0000000000000000 R14: 1ffff110152ccf0d R15: ffff88808820dc40 kobject: 'tx-0' (00000000e6698f16): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000e6698f16): kobject_uevent_env kobject: 'tx-0' (00000000e6698f16): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' __batadv_mcast_mla_update net/batman-adv/multicast.c:635 [inline] batadv_mcast_mla_update+0x78e/0x2980 net/batman-adv/multicast.c:661 kobject: 'veth1_to_bond' (00000000a8d46f44): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'veth1_to_bond' (00000000a8d46f44): kobject_uevent_env kobject: 'veth1_to_bond' (00000000a8d46f44): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond' kobject: 'queues' (000000006228a66d): kobject_add_internal: parent: 'veth1_to_bond', set: '' kobject: 'queues' (000000006228a66d): kobject_uevent_env kobject: 'queues' (000000006228a66d): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000008bc09a3a): kobject_add_internal: parent: 'queues', set: 'queues' process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 kobject: 'rx-0' (000000008bc09a3a): kobject_uevent_env kobject: 'rx-0' (000000008bc09a3a): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond/queues/rx-0' kobject: 'tx-0' (000000007f0c3f6d): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000007f0c3f6d): kobject_uevent_env kobject: 'tx-0' (000000007f0c3f6d): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond/queues/tx-0' kobject: 'batman_adv' (00000000f9be0f83): kobject_add_internal: parent: 'veth1_to_bond', set: '' kobject: 'bond_slave_1' (000000003c754cbc): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'bond_slave_1' (000000003c754cbc): kobject_uevent_env worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kobject: 'bond_slave_1' (000000003c754cbc): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1' kobject: 'queues' (000000002a7c877f): kobject_add_internal: parent: 'bond_slave_1', set: '' kobject: 'queues' (000000002a7c877f): kobject_uevent_env kobject: 'queues' (000000002a7c877f): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000bd1d2cc7): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000bd1d2cc7): kobject_uevent_env kobject: 'rx-0' (00000000bd1d2cc7): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1/queues/rx-0' kobject: 'tx-0' (00000000ccbdecac): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000ccbdecac): kobject_uevent_env kobject: 'tx-0' (00000000ccbdecac): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1/queues/tx-0' kobject: 'batman_adv' (0000000021ba1ff8): kobject_add_internal: parent: 'bond_slave_1', set: '' kthread+0x357/0x430 kernel/kthread.c:246 kobject: 'ip6gretap0' (0000000011d834fd): kobject_add_internal: parent: 'net', set: 'devices' ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 kobject: 'ip6gretap0' (0000000011d834fd): kobject_uevent_env Kernel Offset: disabled Rebooting in 86400 seconds.. 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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS autolearn=unavailable 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 45D57C43387 for ; Sat, 12 Jan 2019 18:11:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1B263206B6 for ; Sat, 12 Jan 2019 18:11:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726492AbfALSLF (ORCPT ); Sat, 12 Jan 2019 13:11:05 -0500 Received: from mail-io1-f71.google.com ([209.85.166.71]:50121 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725842AbfALSLF (ORCPT ); Sat, 12 Jan 2019 13:11:05 -0500 Received: by mail-io1-f71.google.com with SMTP id c4so16115605ioh.16 for ; Sat, 12 Jan 2019 10:11:04 -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:in-reply-to:message-id:subject :from:to; bh=n9OlPP2y9AhcJSBqHYvIsQy9vPGlapBWfWMbUCEZU6Y=; b=WJDyoKbfIcH26AkCTwQE7voYvRXR4iXLYAGStPKKK2ZJu3bxFph9634NaB/JY3r7j9 pDUK1i7uLCMyyxiHBPQXz1TOIqyT+o1jlm3uh+9ZWgNsIjk3eaBh2rQjhSpTc7fWGkfE zC/ibR7IcvDwCqZFS8OPjZC+5CqO8TEIGvPAiCcK2L+nynLHcwO/0CuGt707xngwoJ7C s/kadyWzJPR3ihyyth0VFdDHbavDP2Hrh0Zqr4+uKBsJ85IzjznM6zkeIW7uZNOuLYWY y3bZQpVu/4EZgiiZqAruDk/MiLgqeFugsnIaevU5//fEJDiFm62SKZr8mHrlye6OInHI yPUQ== X-Gm-Message-State: AJcUukd/1/sMpbNNc7eVt5qicrMsEYxyn9qgKpT99vyx/yphSOUYk3Gr rvN1iPCEpRdfJGWq4Xo3QJOaFrt9h3dthnOv222m2fWd8vt7 X-Google-Smtp-Source: ALg8bN5GxV/iLANixJUaWdIZFqb1MB9KGup96Bf1/4dLRkc+LrGcRVONrxdwYRjYNep71WYvBu8JROjiDM5NEFovHV7umzOSKDbC MIME-Version: 1.0 X-Received: by 2002:a24:4245:: with SMTP id i66mr4410454itb.35.1547316662940; Sat, 12 Jan 2019 10:11:02 -0800 (PST) Date: Sat, 12 Jan 2019 10:11:02 -0800 In-Reply-To: <000000000000fa4f60057e499989@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000cb9e2057f46bcb2@google.com> Subject: Re: WARNING in batadv_mcast_mla_tt_retract From: syzbot To: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, davem@davemloft.net, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.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 Message-ID: <20190112181102.EIs7Vw0pPZoS4pSDAXgj5SO1OmrPSufdkhxCAhkEFkk@z> syzbot has found a reproducer for the following crash on: HEAD commit: 4b3c31c8d4dd Merge branch 'i2c/for-current' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12fecc7f400000 kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2 dashboard link: https://syzkaller.appspot.com/bug?extid=83f2d54ec6b7e417e13f compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=139c6408c00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+83f2d54ec6b7e417e13f@syzkaller.appspotmail.com IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready 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): veth1_to_team: link is not ready WARNING: CPU: 0 PID: 26 at net/batman-adv/multicast.c:337 batadv_mcast_mla_tt_retract+0x3d7/0x4b0 net/batman-adv/multicast.c:337 kobject: 'lo' (000000007d40203a): kobject_uevent_env Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.0.0-rc1+ #21 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_mcast_mla_update Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 kobject: 'lo' (000000007d40203a): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'queues' (0000000029ca31b3): kobject_add_internal: parent: 'lo', set: '' __warn.cold+0x20/0x48 kernel/panic.c:571 kobject: 'queues' (0000000029ca31b3): kobject_uevent_env report_bug+0x263/0x2b0 lib/bug.c:186 kobject: 'queues' (0000000029ca31b3): kobject_uevent_env: filter function caused the event to drop! fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 kobject: 'rx-0' (00000000a8654327): kobject_add_internal: parent: 'queues', set: 'queues' invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:batadv_mcast_mla_tt_retract+0x3d7/0x4b0 net/batman-adv/multicast.c:337 kobject: 'rx-0' (00000000a8654327): kobject_uevent_env Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 c8 00 00 00 48 81 c4 a0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 29 07 b0 f9 <0f> 0b e9 de fc ff ff e8 9d f2 f3 f9 e9 e3 fd ff ff 48 89 df e8 b0 RSP: 0018:ffff8880a96676b0 EFLAGS: 00010293 RAX: ffff8880a96586c0 RBX: 0000000000000001 RCX: ffffffff87d1ed13 RDX: 0000000000000000 RSI: ffffffff87d1f037 RDI: 0000000000000007 kobject: 'rx-0' (00000000a8654327): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' RBP: ffff8880a9667778 R08: ffff8880a96586c0 R09: 0000000000000003 R10: 0000000000000000 R11: ffff8880ae62dc7b R12: ffff8880a9667868 R13: 0000000000000000 R14: 1ffff110152ccf0d R15: ffff88808820dc40 kobject: 'tx-0' (00000000e6698f16): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000e6698f16): kobject_uevent_env kobject: 'tx-0' (00000000e6698f16): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' __batadv_mcast_mla_update net/batman-adv/multicast.c:635 [inline] batadv_mcast_mla_update+0x78e/0x2980 net/batman-adv/multicast.c:661 kobject: 'veth1_to_bond' (00000000a8d46f44): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'veth1_to_bond' (00000000a8d46f44): kobject_uevent_env kobject: 'veth1_to_bond' (00000000a8d46f44): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond' kobject: 'queues' (000000006228a66d): kobject_add_internal: parent: 'veth1_to_bond', set: '' kobject: 'queues' (000000006228a66d): kobject_uevent_env kobject: 'queues' (000000006228a66d): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000008bc09a3a): kobject_add_internal: parent: 'queues', set: 'queues' process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 kobject: 'rx-0' (000000008bc09a3a): kobject_uevent_env kobject: 'rx-0' (000000008bc09a3a): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond/queues/rx-0' kobject: 'tx-0' (000000007f0c3f6d): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000007f0c3f6d): kobject_uevent_env kobject: 'tx-0' (000000007f0c3f6d): fill_kobj_path: path = '/devices/virtual/net/veth1_to_bond/queues/tx-0' kobject: 'batman_adv' (00000000f9be0f83): kobject_add_internal: parent: 'veth1_to_bond', set: '' kobject: 'bond_slave_1' (000000003c754cbc): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'bond_slave_1' (000000003c754cbc): kobject_uevent_env worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kobject: 'bond_slave_1' (000000003c754cbc): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1' kobject: 'queues' (000000002a7c877f): kobject_add_internal: parent: 'bond_slave_1', set: '' kobject: 'queues' (000000002a7c877f): kobject_uevent_env kobject: 'queues' (000000002a7c877f): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000bd1d2cc7): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000bd1d2cc7): kobject_uevent_env kobject: 'rx-0' (00000000bd1d2cc7): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1/queues/rx-0' kobject: 'tx-0' (00000000ccbdecac): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000ccbdecac): kobject_uevent_env kobject: 'tx-0' (00000000ccbdecac): fill_kobj_path: path = '/devices/virtual/net/bond_slave_1/queues/tx-0' kobject: 'batman_adv' (0000000021ba1ff8): kobject_add_internal: parent: 'bond_slave_1', set: '' kthread+0x357/0x430 kernel/kthread.c:246 kobject: 'ip6gretap0' (0000000011d834fd): kobject_add_internal: parent: 'net', set: 'devices' ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 kobject: 'ip6gretap0' (0000000011d834fd): kobject_uevent_env Kernel Offset: disabled Rebooting in 86400 seconds..