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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 AEE14C433E1 for ; Wed, 26 Aug 2020 14:27:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9301821741 for ; Wed, 26 Aug 2020 14:27:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727979AbgHZO13 (ORCPT ); Wed, 26 Aug 2020 10:27:29 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:39167 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726950AbgHZO1V (ORCPT ); Wed, 26 Aug 2020 10:27:21 -0400 Received: by mail-io1-f71.google.com with SMTP id v10so1353271iot.6 for ; Wed, 26 Aug 2020 07:27:20 -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=2t2imlzUJImx6gGVkGASznZ5mLOsmh2h9yveaDOOsmQ=; b=OgeMuxilEw403c/lfznn1u9YGucnzVOrQ/pZ4OxoszxGOQZPADT7qhuC7I/KPameeu uxdGt0CpibzVm0w8PuyFz4A05djtao4TWJNnWXrKNqwet9uqs+yW0zwU2QOKxAzkBOUD KQiRRZUycMJu8Gr2SznRwVG2GsR2SN/Sgv9OX/pOP/Kx5zjKTMHuSgv7DFA285m8Egyp N2jNsXCBZnKbC5FRU/OYGR55EBodfpVsm7BoeUrmF9lFIsv4VIG5n/rJOrONBRYYgyki f5sy6fHKc8qNIcFo2105rCHtAl+GF0u51b+8ENH98dXOo3/SwrGrmORqEnm7lSrsjdff hXgA== X-Gm-Message-State: AOAM5332WT6NvKi8EqzxrsiluNzcUG4q+lMCWk9kFIq42m8yMt5DfSfN loVjow+MgsIx63GN1CddWpp1hvGrzvLy30t3HJJrSBPL0aMK X-Google-Smtp-Source: ABdhPJxsdSc3sDn3B4+ihFDNyOQDunKNE96JPJyLreZd3lon0uehkjiCIVmdeeNvC+2yVc2Wsa6pz/VE7TNQ9EBB0vkcgaIG5W/0 MIME-Version: 1.0 X-Received: by 2002:a92:d2c1:: with SMTP id w1mr12335216ilg.273.1598452040492; Wed, 26 Aug 2020 07:27:20 -0700 (PDT) Date: Wed, 26 Aug 2020 07:27:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000106c1305adc89e60@google.com> Subject: INFO: rcu detected stall in process_one_work (3) From: syzbot To: fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de 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 Hello, syzbot found the following issue on: HEAD commit: abb3438d Merge tag 'm68knommu-for-v5.9-rc3' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11563996900000 kernel config: https://syzkaller.appspot.com/x/.config?x=978db74cb30aa994 dashboard link: https://syzkaller.appspot.com/bug?extid=f0f857c714a8800e048c compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15f47cb9900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14171941900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f0f857c714a8800e048c@syzkaller.appspotmail.com rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6878 at kernel/sched/core.c:3013 rq_unlock kernel/sched/sched.h:1326 [inline] WARNING: CPU: 1 PID: 6878 at kernel/sched/core.c:3013 try_invoke_on_locked_down_task+0x214/0x2c0 kernel/sched/core.c:3019 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6878 Comm: kworker/1:0 Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp srcu_invoke_callbacks Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x4a kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:try_invoke_on_locked_down_task+0x214/0x2c0 kernel/sched/core.c:3013 Code: 45 31 f6 49 39 c0 74 3a 8b 74 24 38 49 8d 78 18 4c 89 04 24 e8 2d 99 08 00 4c 8b 04 24 4c 89 c7 e8 41 33 a5 06 e9 29 ff ff ff <0f> 0b e9 86 fe ff ff 4c 89 ee 48 89 ef 41 ff d4 41 89 c6 e9 11 ff RSP: 0018:ffffc90000da8bd8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff920001b517d RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff81612380 RDI: ffff8880953c2540 RBP: ffff8880953c2540 R08: 0000000000000033 R09: ffffffff89bcb363 R10: 0000000000000629 R11: 0000000000000001 R12: ffffffff81612380 R13: ffffc90000da8d00 R14: ffff8880953c28c0 R15: ffff8880ae736c00 rcu_print_task_stall kernel/rcu/tree_stall.h:267 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:634 [inline] rcu_pending kernel/rcu/tree.c:3637 [inline] rcu_sched_clock_irq.cold+0x92e/0xccd kernel/rcu/tree.c:2519 update_process_times+0x25/0xa0 kernel/time/timer.c:1710 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xb2/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 c8 3b b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d f3 0f c0 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 95 87 59 f9 65 8b 05 8e d2 0b 78 RSP: 0018:ffffc90003ac7c28 EFLAGS: 00000286 RAX: 1ffffffff136c779 RBX: 0000000000000286 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffffc90000dd7c30 R08: 0000000000000001 R09: ffffffff8c5f3a0f R10: fffffbfff18be741 R11: 0000000000000001 R12: ffffe8ffffd0a740 R13: ffffe8ffffd0a680 R14: ffffe8ffffd0a640 R15: ffffc90000dd7c18 srcu_invoke_callbacks+0x207/0x399 kernel/rcu/srcutree.c:1201 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds.. --- This report is generated by a bot. 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