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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,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 DEFEBC2D0DB for ; Fri, 24 Jan 2020 19:57:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B7B8220702 for ; Fri, 24 Jan 2020 19:57:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392334AbgAXT5L (ORCPT ); Fri, 24 Jan 2020 14:57:11 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:55920 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389523AbgAXT5L (ORCPT ); Fri, 24 Jan 2020 14:57:11 -0500 Received: by mail-io1-f69.google.com with SMTP id z21so1987254iob.22 for ; Fri, 24 Jan 2020 11:57:11 -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=hRlNBP7jXaxKThGmu6kTzQTXulJoKE1PBf05vPGZ+m8=; b=JQb0867SrxDKW26iaCdMjUaLYtdishKezjgvskkXZnuGkAic9KyhTU1E3frABqpA8q fk9xPYFcxsRfZPeG1+MDc4hH0xThYHU9FD3eS6gQBPL93Rm8aC5BD82xpc6S8+QAdfTI 7u4yOXGOtz3MiVSDZMFmCTSJuwxEtxeFvSg+7N5pgMG3YAzv7/46fTIhF9W4y4DLKKYn 2rfs4SifuXZfRjyBBPdqUe3lZJEVb9lKW0287ZJjck9QmIcUiZ0WO75Gzw1fbwzyO18m gWbrUudCkXYTiXIxkJ9xwIK+5yITHJ28kcSEMFB8/S8JYyafPehP95vruU23m/I//nrC se5A== X-Gm-Message-State: APjAAAW/qeXVSymfOZIg2fR+A0OkXfjscf42Nz9rDpovldTRweiSfosk E4+M5wvLJEtngLpE2hOwOWcnI9ZjtlFXr50VX6BLh1uxVcEU X-Google-Smtp-Source: APXvYqxnB9IwbeEOXDCmxIw+f0gZmRlEI4+jEupCgyq5rmtFCCfLR1NPxZkwL5degpD1KV5IRoiErEL9AKxqEC5eodDTKryCToQ2 MIME-Version: 1.0 X-Received: by 2002:a6b:b74a:: with SMTP id h71mr3429087iof.212.1579895830669; Fri, 24 Jan 2020 11:57:10 -0800 (PST) Date: Fri, 24 Jan 2020 11:57:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c4eeaf059ce82991@google.com> Subject: INFO: rcu detected stall in ip_set_uadd From: syzbot To: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, info@metux.net, jeremy@azazel.net, kadlec@blackhole.kfki.hu, kadlec@netfilter.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 4703d911 Merge tag 'xarray-5.5' of git://git.infradead.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=124c1b69e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cf8e288883e40aba dashboard link: https://syzkaller.appspot.com/bug?extid=4b0e9d4ff3cf117837e5 compiler: gcc (GCC) 9.0.0 20181231 (experimental) userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16a8bb69e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1010c611e00000 The bug was bisected to: commit 23c42a403a9cfdbad6004a556c927be7dd61a8ee Author: Jozsef Kadlecsik Date: Sat Oct 27 13:07:40 2018 +0000 netfilter: ipset: Introduction of new commands and protocol version 7 bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10050376e00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=12050376e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=14050376e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+4b0e9d4ff3cf117837e5@syzkaller.appspotmail.com Fixes: 23c42a403a9c ("netfilter: ipset: Introduction of new commands and protocol version 7") rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10510 ticks this GP) idle=6ca/1/0x4000000000000002 softirq=16152/16155 fqs=7 (t=10500 jiffies g=8933 q=807) rcu: rcu_preempt kthread starved for 10485 jiffies! g8933 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt I29264 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x934/0x1f90 kernel/sched/core.c:4081 schedule+0xdc/0x2b0 kernel/sched/core.c:4155 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0x9b2/0x18d0 kernel/rcu/tree.c:1821 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 9819 Comm: syz-executor189 Not tainted 5.5.0-rc7-syzkaller #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+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq.cold+0x509/0xc0d kernel/rcu/tree.c:2271 update_process_times+0x2d/0x70 kernel/time/timer.c:1726 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:171 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1314 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__sanitizer_cov_trace_pc+0x1a/0x50 kernel/kcov.c:183 Code: c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 65 48 8b 04 25 c0 1e 02 00 65 8b 15 14 27 8d 7e 81 e2 00 01 1f 00 <48> 8b 75 08 75 2b 8b 90 80 13 00 00 83 fa 02 75 20 48 8b 88 88 13 RSP: 0018:ffffc90002146e08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a8a0e380 RBX: 0000000000000002 RCX: ffffffff8676837f RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000004 RBP: ffffc90002146e08 R08: ffff8880a8a0e380 R09: ffffed10152ec273 R10: ffffed10152ec272 R11: ffff8880a9761397 R12: ffff8880a97613c0 R13: ffff8880a513e500 R14: 0000000000000003 R15: dffffc0000000000 hash_ip4_expire.isra.0+0x2c1/0x8d0 net/netfilter/ipset/ip_set_hash_gen.h:476 hash_ip4_add+0x178/0x1b6c net/netfilter/ipset/ip_set_hash_gen.h:709 hash_ip4_uadt+0x546/0x7a0 net/netfilter/ipset/ip_set_hash_ip.c:151 call_ad+0x1a0/0x5a0 net/netfilter/ipset/ip_set_core.c:1716 ip_set_ad.isra.0+0x572/0xb20 net/netfilter/ipset/ip_set_core.c:1804 ip_set_uadd+0x37/0x50 net/netfilter/ipset/ip_set_core.c:1829 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 nfnetlink_rcv+0x1ba/0x460 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x753/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417 __compat_sys_sendmsg net/compat.c:642 [inline] __do_compat_sys_sendmsg net/compat.c:649 [inline] __se_compat_sys_sendmsg net/compat.c:646 [inline] __ia32_compat_sys_sendmsg+0x7a/0xb0 net/compat.c:646 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f5e9a9 Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000ffcfea5c EFLAGS: 00000202 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000d00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ffcfeb74 RBP: 00000000ffcfeb7c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches