Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752337AbdFLGhZ (ORCPT ); Mon, 12 Jun 2017 02:37:25 -0400 Received: from mail-yb0-f174.google.com ([209.85.213.174]:33275 "EHLO mail-yb0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752272AbdFLGhX (ORCPT ); Mon, 12 Jun 2017 02:37:23 -0400 MIME-Version: 1.0 From: Dison River Date: Mon, 12 Jun 2017 14:37:22 +0800 Message-ID: Subject: WARNING in dev_watchdog To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, security@kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5142 Lines: 115 Hi: I've got the following error report while fuzzing the kernel with syzkaller on linux-4.11.0-rc3. log: WARNING: CPU: 2 PID: 0 at net/sched/sch_generic.c:316 dev_watchdog+0x648/0x770 net/sched/sch_generic.c:315 NETDEV WATCHDOG: eth0 (e1000): transmit queue 0 timed out Kernel panic - not syncing: panic_on_warn set ... CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.11.0-rc3 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x95/0xe8 lib/dump_stack.c:52 panic+0x1ae/0x386 kernel/panic.c:180 __warn+0x1c4/0x1e0 kernel/panic.c:541 warn_slowpath_fmt+0xac/0xd0 kernel/panic.c:564 dev_watchdog+0x648/0x770 net/sched/sch_generic.c:315 call_timer_fn+0x15b/0x5e0 kernel/time/timer.c:1268 expire_timers kernel/time/timer.c:1307 [inline] __run_timers kernel/time/timer.c:1601 [inline] run_timer_softirq+0x5c7/0x1140 kernel/time/timer.c:1614 __do_softirq+0x217/0x8b7 kernel/softirq.c:284 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x198/0x1d0 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:657 [inline] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:962 apic_timer_interrupt+0x90/0xa0 arch/x86/entry/entry_64.S:707 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:53 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:95 [inline] RIP: 0010:default_idle+0x1f/0x2d0 arch/x86/kernel/process.c:275 RSP: 0018:ffff88006dee7e78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: ffff88006de9db40 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88006de9e314 RBP: ffff88006dee7e98 R08: 0000000000000040 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83efc9b8 R13: ffff88006de9db40 R14: 0000000000000002 R15: ffff88006de9db40 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:266 default_idle_call+0x36/0x50 kernel/sched/idle.c:97 cpuidle_idle_call kernel/sched/idle.c:155 [inline] do_idle+0x20b/0x2d0 kernel/sched/idle.c:244 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:346 start_secondary+0x245/0x2d0 arch/x86/kernel/smpboot.c:275 start_cpu+0x14/0x14 arch/x86/kernel/head_64.S:306 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. report : syzkaller login: [ 37.041894] ------------[ cut here ]------------ [ 37.042430] WARNING: CPU: 2 PID: 0 at net/sched/sch_generic.c:316 dev_watchdog+0x648/0x770 [ 37.042978] NETDEV WATCHDOG: eth0 (e1000): transmit queue 0 timed out [ 37.043405] Kernel panic - not syncing: panic_on_warn set ... [ 37.043405] [ 37.043888] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.11.0-rc3 #2 [ 37.044297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 37.044909] Call Trace: [ 37.045080] [ 37.045226] dump_stack+0x95/0xe8 [ 37.045453] ? dev_watchdog+0x648/0x770 [ 37.045712] panic+0x1ae/0x386 [ 37.045924] ? percpu_up_read_preempt_enable.constprop.53+0xae/0xae [ 37.046342] ? dev_watchdog+0x648/0x770 [ 37.046605] ? vprintk_default+0x28/0x30 [ 37.046873] ? dev_watchdog+0x648/0x770 [ 37.047114] __warn+0x1c4/0x1e0 [ 37.047820] warn_slowpath_fmt+0xac/0xd0 [ 37.048467] ? __warn+0x1e0/0x1e0 [ 37.048698] ? dev_watchdog+0x125/0x770 [ 37.048963] dev_watchdog+0x648/0x770 [ 37.049218] call_timer_fn+0x15b/0x5e0 [ 37.049475] ? call_timer_fn+0xcc/0x5e0 [ 37.049739] ? qdisc_rcu_free+0x110/0x110 [ 37.050014] ? process_timeout+0x20/0x20 [ 37.050285] ? trace_hardirqs_on_caller+0x19e/0x580 [ 37.053699] ? qdisc_rcu_free+0x110/0x110 [ 37.054931] ? qdisc_rcu_free+0x110/0x110 [ 37.055296] run_timer_softirq+0x5c7/0x1140 [ 37.055949] ? msleep_interruptible+0x170/0x170 [ 37.056671] ? lapic_timer_shutdown+0x3d/0x50 [ 37.057268] ? clockevents_switch_state+0xe3/0x320 [ 37.057837] __do_softirq+0x217/0x8b7 [ 37.058097] irq_exit+0x198/0x1d0 [ 37.058326] smp_apic_timer_interrupt+0x76/0xa0 [ 37.058634] apic_timer_interrupt+0x90/0xa0 [ 37.058921] RIP: 0010:default_idle+0x1f/0x2d0 [ 37.059217] RSP: 0018:ffff88006dee7e78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 37.059702] RAX: 0000000000000007 RBX: ffff88006de9db40 RCX: 0000000000000000 [ 37.060179] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88006de9e314 [ 37.065968] RBP: ffff88006dee7e98 R08: 0000000000000040 R09: 0000000000000000 [ 37.066451] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83efc9b8 [ 37.073921] R13: ffff88006de9db40 R14: 0000000000000002 R15: ffff88006de9db40 [ 37.074405] [ 37.074767] ? default_idle+0x1d/0x2d0 [ 37.075026] arch_cpu_idle+0xa/0x10 [ 37.075266] default_idle_call+0x36/0x50 [ 37.075534] do_idle+0x20b/0x2d0 [ 37.075815] cpu_startup_entry+0x18/0x20 [ 37.076084] start_secondary+0x245/0x2d0 [ 37.076352] start_cpu+0x14/0x14 [ 37.077025] Dumping ftrace buffer: [ 37.077308] (ftrace buffer empty) [ 37.077555] Kernel Offset: disabled [ 37.078786] Rebooting in 86400 seconds..