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=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 E5175C43441 for ; Mon, 19 Nov 2018 22:19:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7DACF2080C for ; Mon, 19 Nov 2018 22:19:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7DACF2080C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730371AbeKTIow (ORCPT ); Tue, 20 Nov 2018 03:44:52 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:51978 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725722AbeKTIow (ORCPT ); Tue, 20 Nov 2018 03:44:52 -0500 Received: by mail-io1-f69.google.com with SMTP id x10so5810058ioj.18 for ; Mon, 19 Nov 2018 14:19:04 -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:message-id:subject:from:to; bh=lKAtMnR6VuTYuTcCMM2aGPupN2Ipjircn7xyei6Tq9o=; b=omafRAuUj/6gmXntDqrab4jrqbEPlWcR/HfQFmNn9Sp/CJoItRfHxMb7oMk2iNv4Zb Et13+5BFo+QRRu745Sv/eAf15ZJ83Su0BH1djql0tfsNAiA7sZR/2Y4YHnLG+xYXtDBV MQT38TQ1EQZgAyurMiRo7vhYT0hdUXNC6/qZy9RnXV1ZVzru695979d5zx7X8P9vMswA Se8uxUCNj/pnbovnc7UiYYfOvUaPZxuSQNOCb+xDOoCmWMmQun7Dq5x7ETZJGUh2PSc6 lcbcR1lW+h5oYzuf6lOsWFHlvpXwmy0aHD6hvwJXj4y5v34nloY6CkbKqQphI59hqY1G 7/Yg== X-Gm-Message-State: AGRZ1gL8HueR3KXG89XAm7SsE418IXt06/fnSoM14Fk05wFoRksuCFHJ hLawj4oXJCP/LYXzIGEqPkQNmJf7nKzYVg5JmmBuwt8TP3Ic X-Google-Smtp-Source: AFSGD/VIxoUHWnTcgMu6zUZbqBtzX+xA+EeW7zFRO5doKVCGOSdCbJcFpuTuxZoVxpSgEhgo5wmXt0vss2qcJL4UuhPBLKN5t/cw MIME-Version: 1.0 X-Received: by 2002:a24:153:: with SMTP id 80-v6mr8262938itk.19.1542665944225; Mon, 19 Nov 2018 14:19:04 -0800 (PST) Date: Mon, 19 Nov 2018 14:19:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009ce9ee057b0be7f8@google.com> Subject: WARNING in update_load_avg From: syzbot To: andy.shevchenko@gmail.com, bp@alien8.de, douly.fnst@cn.fujitsu.com, hpa@zytor.com, konrad.wilk@oracle.com, len.brown@intel.com, linux-kernel@vger.kernel.org, mingo@redhat.com, puwen@hygon.cn, rppt@linux.vnet.ibm.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, ville.syrjala@linux.intel.com, x86@kernel.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: cddaf02bcb73 tg3: optionally use eth_platform_get_mac_addr.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=15810d33400000 kernel config: https://syzkaller.appspot.com/x/.config?x=d86f24333880b605 dashboard link: https://syzkaller.appspot.com/bug?extid=20fddccabc274e99398e compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10272c5d400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=157bd093400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+20fddccabc274e99398e@syzkaller.appspotmail.com 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 syz-executor496 (6238) used greatest stack depth: 15648 bytes left WARNING: CPU: 1 PID: 0 at kernel/sched/sched.h:1015 rq_clock_task kernel/sched/sched.h:1015 [inline] WARNING: CPU: 1 PID: 0 at kernel/sched/sched.h:1015 cfs_rq_clock_task kernel/sched/fair.c:4283 [inline] WARNING: CPU: 1 PID: 0 at kernel/sched/sched.h:1015 update_load_avg+0x1539/0x2470 kernel/sched/fair.c:3492 ================================================================== BUG: KASAN: stack-out-of-bounds in lookup_object lib/debugobjects.c:157 [inline] BUG: KASAN: stack-out-of-bounds in debug_object_deactivate+0x3a8/0x450 lib/debugobjects.c:543 Kernel panic - not syncing: panic_on_warn set ... Read of size 8 at addr ffff8881dae000e0 by task syz-executor496/6371 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-rc2+ #302 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+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 __warn.cold.8+0x20/0x45 kernel/panic.c:540 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:rq_clock_task kernel/sched/sched.h:1015 [inline] RIP: 0010:cfs_rq_clock_task kernel/sched/fair.c:4283 [inline] RIP: 0010:update_load_avg+0x1539/0x2470 kernel/sched/fair.c:3492 Code: e8 fc e1 69 00 e9 8b f8 ff ff 48 8d 7a 18 be ff ff ff ff 48 89 95 30 fb ff ff e8 52 e5 07 00 48 8b 95 30 fb ff ff 85 c0 75 29 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f9 48 c1 e9 03 80 3c 01 RSP: 0018:ffff8881daf07238 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8881b3b487c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000086 RBP: ffff8881daf07750 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8881daf2d850 R12: ffff8881bf344bc0 R13: ffff8881daf07728 R14: 0000000000000000 R15: ffff8881b3b48930 update_blocked_averages+0xcc7/0x1e00 kernel/sched/fair.c:7401 run_rebalance_domains+0x37c/0x500 kernel/sched/fair.c:9696 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57 Code: e9 2c ff ff ff 48 89 c7 48 89 45 d8 e8 33 22 e6 f9 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 22 22 e6 f9 eb 82 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 RSP: 0018:ffff8881d9b27cb8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff1103b364f9b RCX: 0000000000000000 RDX: 1ffffffff12a3f71 RSI: 0000000000000001 RDI: ffffffff8951fb88 RBP: ffff8881d9b27cb8 R08: ffff8881d9b14340 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d9b27d78 R13: ffffffff8a1640e0 R14: 0000000000000000 R15: 0000000000000001 arch_safe_halt arch/x86/include/asm/paravirt.h:151 [inline] default_idle+0xbf/0x490 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x49b/0x5c0 kernel/sched/idle.c:262 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:353 start_secondary+0x487/0x5f0 arch/x86/kernel/smpboot.c:271 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 CPU: 0 PID: 6371 Comm: syz-executor496 Not tainted 4.20.0-rc2+ #302 ====================================================== WARNING: possible circular locking dependency detected 4.20.0-rc2+ #302 Not tainted ------------------------------------------------------ swapper/1/0 is trying to acquire lock: 00000000cee8b2f6 ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 000000008d358a10 (&rq->lock){-.-.}, at: rq_lock_irqsave kernel/sched/sched.h:1110 [inline] 000000008d358a10 (&rq->lock){-.-.}, at: update_blocked_averages+0x156/0x1e00 kernel/sched/fair.c:7381 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&rq->lock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 rq_lock kernel/sched/sched.h:1126 [inline] task_fork_fair+0xb0/0x6d0 kernel/sched/fair.c:9768 sched_fork+0x443/0xba0 kernel/sched/core.c:2359 copy_process+0x25b8/0x87a0 kernel/fork.c:1887 _do_fork+0x1cb/0x11d0 kernel/fork.c:2216 kernel_thread+0x34/0x40 kernel/fork.c:2275 rest_init+0x28/0x372 init/main.c:409 arch_call_rest_init+0xe/0x1b start_kernel+0x9f0/0xa2b init/main.c:745 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 try_to_wake_up+0xdc/0x1490 kernel/sched/core.c:1965 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 __up.isra.1+0x1c0/0x2a0 kernel/locking/semaphore.c:262 up+0x13c/0x1c0 kernel/locking/semaphore.c:187 __up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:236 console_unlock+0x811/0x1190 kernel/printk/printk.c:2432 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 check_stack_usage kernel/exit.c:755 [inline] do_exit.cold.18+0x57/0x16f kernel/exit.c:916 do_group_exit+0x177/0x440 kernel/exit.c:970 __do_sys_exit_group kernel/exit.c:981 [inline] __se_sys_exit_group kernel/exit.c:979 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:979 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 ((console_sem).lock){-.-.}: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x1f0 kernel/printk/printk.c:219 console_trylock+0x15/0xa0 kernel/printk/printk.c:2247 console_trylock_spinning kernel/printk/printk.c:1653 [inline] vprintk_emit+0x372/0x990 kernel/printk/printk.c:1921 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 __warn+0x9e/0x1d0 kernel/panic.c:522 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 rq_clock_task kernel/sched/sched.h:1015 [inline] cfs_rq_clock_task kernel/sched/fair.c:4283 [inline] update_load_avg+0x1539/0x2470 kernel/sched/fair.c:3492 update_blocked_averages+0xcc7/0x1e00 kernel/sched/fair.c:7401 run_rebalance_domains+0x37c/0x500 kernel/sched/fair.c:9696 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57 arch_safe_halt arch/x86/include/asm/paravirt.h:151 [inline] default_idle+0xbf/0x490 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x49b/0x5c0 kernel/sched/idle.c:262 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:353 start_secondary+0x487/0x5f0 arch/x86/kernel/smpboot.c:271 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 other info that might help us debug this: Chain exists of: (console_sem).lock --> &p->pi_lock --> &rq->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rq->lock); lock(&p->pi_lock); lock(&rq->lock); lock((console_sem).lock); *** DEADLOCK *** 1 lock held by swapper/1/0: #0: 000000008d358a10 (&rq->lock){-.-.}, at: rq_lock_irqsave kernel/sched/sched.h:1110 [inline] #0: 000000008d358a10 (&rq->lock){-.-.}, at: update_blocked_averages+0x156/0x1e00 kernel/sched/fair.c:7381 stack backtrace: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-rc2+ #302 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+0x244/0x39d lib/dump_stack.c:113 print_circular_bug.isra.35.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2347 [inline] __lock_acquire+0x3399/0x4c20 kernel/locking/lockdep.c:3341 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x1f0 kernel/printk/printk.c:219 console_trylock+0x15/0xa0 kernel/printk/printk.c:2247 console_trylock_spinning kernel/printk/printk.c:1653 [inline] vprintk_emit+0x372/0x990 kernel/printk/printk.c:1921 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 __warn+0x9e/0x1d0 kernel/panic.c:522 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:rq_clock_task kernel/sched/sched.h:1015 [inline] RIP: 0010:cfs_rq_clock_task kernel/sched/fair.c:4283 [inline] RIP: 0010:update_load_avg+0x1539/0x2470 kernel/sched/fair.c:3492 Code: e8 fc e1 69 00 e9 8b f8 ff ff 48 8d 7a 18 be ff ff ff ff 48 89 95 30 fb ff ff e8 52 e5 07 00 48 8b 95 30 fb ff ff 85 c0 75 29 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f9 48 c1 e9 03 80 3c 01 RSP: 0018:ffff8881daf07238 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8881b3b487c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000086 RBP: ffff8881daf07750 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8881daf2d850 R12: ffff8881bf344bc0 R13: ffff8881daf07728 R14: 0000000000000000 R15: ffff8881b3b48930 update_blocked_averages+0xcc7/0x1e00 kernel/sched/fair.c:7401 run_rebalance_domains+0x37c/0x500 kernel/sched/fair.c:9696 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 ? inte Lost 38 message(s)! Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: The buggy address belongs to the page: page:ffffea00076b8000 count:1 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x2fffc0000001000(reserved) raw: 02fffc0000001000 ffffea00076b8008 ffffea00076b8008 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881dadfff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881dae00000: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 > ffff8881dae00080: f1 00 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 00 00 00 ^ ffff8881dae00100: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 ffff8881dae00180: f1 f8 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 ================================================================== kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6371 Comm: syz-executor496 Tainted: G B 4.20.0-rc2+ #302 Shutting down cpus with NMI --- 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches