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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 F3F9CC43387 for ; Wed, 16 Jan 2019 17:01:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BE27C20651 for ; Wed, 16 Jan 2019 17:01:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394466AbfAPRBF (ORCPT ); Wed, 16 Jan 2019 12:01:05 -0500 Received: from mail-it1-f200.google.com ([209.85.166.200]:34941 "EHLO mail-it1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2394422AbfAPRBE (ORCPT ); Wed, 16 Jan 2019 12:01:04 -0500 Received: by mail-it1-f200.google.com with SMTP id v188so2392235ita.0 for ; Wed, 16 Jan 2019 09:01:03 -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=j72ycQqqpQWeoDPFMSeuxvMKgynfwd/HLK27q13GE/s=; b=XpJizGtme7uiQexx+QzOsotIxq6LW0QnvIDOJ8ssOqI7C2vHPYJscSy6tJbyd8neTz JTUDp5TdhC+7aNV2exwJPZwiJBTM7WyGI9wQd7KUkmjqnJTqJG+yV6cLcZsRI0peRfal uTjmYUR0UGs5UkQpLu/Fl7T9VAL+D2ATP3dAKtkexgLpV26CAeiEa25LyjORhoq7QCDC WC309lLtyJcFa3XZkIs3pobxQZJO6eFF/LNFiIBJw6u4jycstc3aalsTQlJaC9114H4R NyeSGn1sKS/ezZfQuYBt0gNJe2chM3HSOrpM7q4/GsMl28KDGHH71+ANYdqJcAm1c7rp BQRw== X-Gm-Message-State: AJcUukd0Q5ABNwBnZQURmJdBzwh7rtJH2jldM/jLElyRxA/hRIXQQRtJ CbC2b4uAsMEFev/mftZgYmRYYESl71Fvwy2HbOWJQE+ZaFnZ X-Google-Smtp-Source: ALg8bN6QsgW+WWHH5YL9Yo0GumqRt0bpyZTLxs47YueCngx2+isbLUTLXrR69x5Yb/iF7bQE6y7U6ZVBQeT0LUrigCNTB5sRnvBA MIME-Version: 1.0 X-Received: by 2002:a24:6212:: with SMTP id d18mr5795891itc.29.1547658063304; Wed, 16 Jan 2019 09:01:03 -0800 (PST) Date: Wed, 16 Jan 2019 09:01:03 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001908be057f963938@google.com> Subject: INFO: rcu detected stall in tipc_disc_timeout From: syzbot To: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, kadlec@blackhole.kfki.hu, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, 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 Hello, syzbot found the following crash on: HEAD commit: 80b3671e9377 ip6_gre: update version related info when cha.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=151e546b400000 kernel config: https://syzkaller.appspot.com/x/.config?x=8a4dffabfb4e36f9 dashboard link: https://syzkaller.appspot.com/bug?extid=9f5271e1f46f2954d29c 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+9f5271e1f46f2954d29c@syzkaller.appspotmail.com Enabling of bearer rejected, already enabled Enabling of bearer rejected, already enabled rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=776/1/0x4000000000000004 softirq=84430/84432 fqs=5221 rcu: (t=10500 jiffies g=117297 q=5397) NMI backtrace for cpu 1 CPU: 1 PID: 7906 Comm: syz-fuzzer Not tainted 5.0.0-rc2+ #21 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1211 print_cpu_stall.cold+0x227/0x40c kernel/rcu/tree.c:1348 check_cpu_stall kernel/rcu/tree.c:1422 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xb32/0x1380 kernel/rcu/tree.c:2521 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:kasan_check_read+0x8/0x20 mm/kasan/common.c:100 Code: 73 58 89 c2 48 c7 c7 70 a5 3c 89 f7 da e8 04 77 a2 ff e9 c4 f5 ff ff 90 90 90 90 90 90 90 90 90 90 90 55 89 f6 31 d2 48 89 e5 <48> 8b 4d 08 e8 ff 23 00 00 5d c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 RSP: 0000:ffff8880ae706c30 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8880ae706de8 RCX: 0000000000000004 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffd6d738 RBP: ffff8880ae706c30 R08: 1ffffd1ffffadae7 R09: fffff91ffffadae8 R10: fffff91ffffadae7 R11: ffffe8ffffd6d73b R12: ffffed1015ce0dab R13: ffffe8ffffd6d738 R14: 0000000000000003 R15: 00000000000000fc atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] virt_spin_lock arch/x86/include/asm/qspinlock.h:83 [inline] native_queued_spin_lock_slowpath+0xfe/0x1290 kernel/locking/qspinlock.c:337 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:653 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock+0x2af/0x360 kernel/locking/spinlock_debug.c:113 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] nf_ct_add_to_unconfirmed_list net/netfilter/nf_conntrack_core.c:462 [inline] init_conntrack.isra.0+0xa5c/0x1380 net/netfilter/nf_conntrack_core.c:1421 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1463 [inline] nf_conntrack_in+0xb95/0x1250 net/netfilter/nf_conntrack_core.c:1569 ipv4_conntrack_local+0x169/0x210 net/netfilter/nf_conntrack_proto.c:444 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] __ip_local_out+0x542/0xa90 net/ipv4/ip_output.c:113 ip_local_out+0x2d/0x1b0 net/ipv4/ip_output.c:122 iptunnel_xmit+0x58e/0x980 net/ipv4/ip_tunnel_core.c:91 udp_tunnel_xmit_skb+0x236/0x310 net/ipv4/udp_tunnel.c:200 tipc_udp_xmit.isra.0+0xa9c/0xe40 net/tipc/udp_media.c:181 tipc_udp_send_msg+0x5b2/0x6e0 net/tipc/udp_media.c:235 tipc_bearer_xmit_skb+0x172/0x360 net/tipc/bearer.c:503 tipc_disc_timeout+0xb43/0x1070 net/tipc/discover.c:332 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0033:0x41de97 Code: 4c 89 d1 45 89 c2 48 39 cf 0f 83 51 01 00 00 48 85 ff 0f 84 40 01 00 00 41 83 fa 03 0f 83 2b 01 00 00 45 8d 42 01 44 0f b6 0b <49> 89 ca 44 89 c1 41 d3 e9 48 83 ff 08 74 0b 41 0f ba e1 04 0f 83 RSP: 002b:000000c420031e80 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 000000c420000000 RBX: 000000c41feb6fb9 RCX: 0000000000000040 RDX: 000000c42cbb0000 RSI: 000000c4229208c0 RDI: 0000000000000000 RBP: 000000c420031f18 R08: 0000000000000000 R09: 00000000000000df R10: 0000000000000000 R11: 000000c4229208c0 R12: 000000c42a412930 R13: 0000000000000200 R14: ffffffffffffffff R15: 0000000000000200 --- 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#bug-status-tracking for how to communicate with syzbot.