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Message-ID: <ZnPtIddXEIw/eSHw@xsang-OptiPlex-9020>
Date: Thu, 20 Jun 2024 16:49:37 +0800
From: Oliver Sang <oliver.sang@...el.com>
To: "Ricardo B. Marliere" <ricardo@...liere.net>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Tejun Heo <tj@...nel.org>,
	<oliver.sang@...el.com>
Subject: Re: [linus:master] [workqueue]  5df9197edd:
 BUG:soft_lockup-CPU##stuck_for#s![swapper:#]


sorry, forgot the attachment in last mail.


On Thu, Jun 20, 2024 at 04:46:37PM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> kernel test robot noticed "BUG:soft_lockup-CPU##stuck_for#s![swapper:#]" on:
> 
> commit: 5df9197edd731a44682444631d68c2384f381bf1 ("workqueue: make wq_subsys const")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> 
> [test failed on linus/master      d20f6b3d747c36889b7ce75ee369182af3decb6b]
> [test failed on linux-next/master 6906a84c482f098d31486df8dc98cead21cce2d0]
> 
> in testcase: boot
> 
> compiler: gcc-13
> test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
> 
> (please refer to attached dmesg/kmsg for entire log/backtrace)
> 
> 
> we don't have enough knowledge why this commit could cause random issues,
> while the parent keeps clean even when we run both till 999 times.
> 
> =========================================================================================
> compiler/kconfig/rootfs/sleep/tbox_group/testcase:
>   gcc-13/i386-randconfig-r015-20211011/debian-11.1-i386-20220923.cgz/1/vm-snb/boot
> 
> f297a3844aa059c5 5df9197edd731a44682444631d6
> ---------------- ---------------------------
>        fail:runs  %reproduction    fail:runs
>            |             |             |
>            :999          6%          56:999   dmesg.BUG:kernel_hang_in_boot_stage
>            :999          1%           8:999   dmesg.BUG:kernel_hang_in_test_stage
>            :999          0%           1:999   dmesg.BUG:soft_lockup-CPU##stuck_for#s![kcompactd0:#]
>            :999          0%           3:999   dmesg.BUG:soft_lockup-CPU##stuck_for#s![kworker##:#]
>            :999          9%          89:999   dmesg.BUG:soft_lockup-CPU##stuck_for#s![swapper:#]
>            :999         10%         102:999   dmesg.BUG:workqueue_lockup-pool
>            :999          1%           7:999   dmesg.EIP:__do_softirq
>            :999          0%           1:999   dmesg.EIP:__down_trylock_console_sem
>            :999          1%          10:999   dmesg.EIP:_raw_spin_unlock_irq
>            :999          0%           3:999   dmesg.EIP:_raw_spin_unlock_irqrestore
>            :999          0%           2:999   dmesg.EIP:console_flush_all
>            :999          0%           1:999   dmesg.EIP:console_unlock
>            :999          1%           7:999   dmesg.EIP:lock_acquire
>            :999          1%           7:999   dmesg.EIP:lock_release
>            :999          1%          12:999   dmesg.EIP:raw_spin_rq_unlock_irq
>            :999          0%           1:999   dmesg.EIP:rcu_check_gp_start_stall
>            :999          0%           2:999   dmesg.EIP:seqcount_lockdep_reader_access
>            :999          0%           1:999   dmesg.EIP:tcp_orphan_update
>            :999          9%          88:999   dmesg.EIP:tick_clock_notify
>            :999          0%           1:999   dmesg.EIP:vprintk_store
>            :999          0%           1:999   dmesg.EIP:vsnprintf
>            :999          2%          15:999   dmesg.INFO:rcu_preempt_detected_stalls_on_CPUs/tasks
>            :999          0%           3:999   dmesg.INFO:rcu_preempt_self-detected_stall_on_CPU
>            :999          3%          29:999   dmesg.INFO:task_blocked_for_more_than#seconds
>            :999          2%          16:999   dmesg.IP-Config:Auto-configuration_of_network_failed
>            :999          3%          29:999   dmesg.Kernel_panic-not_syncing:hung_task:blocked_tasks
>            :999          9%          93:999   dmesg.Kernel_panic-not_syncing:softlockup:hung_tasks
>            :999          0%           1:999   dmesg.WARNING:at_kernel/rcu/tree_stall.h:#rcu_check_gp_start_stall
> 
> one hint we could supply is the config for this test is a randconfig which is
> uploaded to [1]
> 
> at the same time, we also tried another config as attached
>   not-reproduce-config-6.8.0-rc2-00006-g5df9197edd73
> 
> both parent/this commit seem clean in the tests for this config.
> 
> =========================================================================================
> compiler/kconfig/rootfs/sleep/tbox_group/testcase:
>   gcc-13/i386-debian-10.3-func/debian-11.1-i386-20220923.cgz/1/vm-snb/boot
> 
> f297a3844aa059c5 5df9197edd731a44682444631d6
> ---------------- ---------------------------
>        fail:runs  %reproduction    fail:runs
>            |             |             |
>         999:999          0%         999:999   pass
> 
> 
> but since the diff between two configs are very big, it's hard for us to
> supply further information.
> 
> just made this report FYI what we observed in our tests.
> if you have any debug patch want us to test, please let us know. Thanks
> 
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <oliver.sang@...el.com>
> | Closes: https://lore.kernel.org/oe-lkp/202406201623.d1a3b599-lkp@intel.com
> 
> 
> [  696.522062][    C0] watchdog: BUG: soft lockup - CPU#0 stuck for 626s! [swapper:1]
> [  696.522062][    C0] Modules linked in:
> [  696.522062][    C0] irq event stamp: 110942
> [ 696.522062][ C0] hardirqs last enabled at (110941): timekeeping_notify (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:77 arch/x86/include/asm/irqflags.h:135 include/linux/stop_machine.h:154 include/linux/stop_machine.h:161 kernel/time/timekeeping.c:1506) 
> [ 696.522062][ C0] hardirqs last disabled at (110942): sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076) 
> [ 696.522062][ C0] softirqs last enabled at (110790): __do_softirq (arch/x86/include/asm/preempt.h:26 kernel/softirq.c:400 kernel/softirq.c:582) 
> [ 696.522062][ C0] softirqs last disabled at (110779): do_softirq_own_stack (arch/x86/kernel/irq_32.c:57 arch/x86/kernel/irq_32.c:147) 
> [  696.522062][    C0] CPU: 0 PID: 1 Comm: swapper Not tainted 6.8.0-rc2-00006-g5df9197edd73 #1
> [ 696.522062][ C0] EIP: tick_clock_notify (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607) 
> [ 696.522062][ C0] Code: 15 d4 1b 8e 98 8b 45 e4 8b 55 e8 a3 d8 1b 8e 98 89 15 dc 1b 8e 98 89 35 c0 1b 8e 98 89 1d c4 1b 8e 98 83 c4 10 5b 5e 5f 5d c3 <80> 0d e4 1b 8e 98 01 c3 80 0d e4 1b 8e 98 01 c3 0f ba 35 e4 1b 8e
> All code
> ========
>    0:	15 d4 1b 8e 98       	adc    $0x988e1bd4,%eax
>    5:	8b 45 e4             	mov    -0x1c(%rbp),%eax
>    8:	8b 55 e8             	mov    -0x18(%rbp),%edx
>    b:	a3 d8 1b 8e 98 89 15 	movabs %eax,0x1bdc1589988e1bd8
>   12:	dc 1b 
>   14:	8e 98 89 35 c0 1b    	mov    0x1bc03589(%rax),%ds
>   1a:	8e 98 89 1d c4 1b    	mov    0x1bc41d89(%rax),%ds
>   20:	8e 98 83 c4 10 5b    	mov    0x5b10c483(%rax),%ds
>   26:	5e                   	pop    %rsi
>   27:	5f                   	pop    %rdi
>   28:	5d                   	pop    %rbp
>   29:	c3                   	ret
>   2a:*	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1c15		<-- trapping instruction
>   31:	c3                   	ret
>   32:	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1c1d
>   39:	c3                   	ret
>   3a:	0f                   	.byte 0xf
>   3b:	ba 35 e4 1b 8e       	mov    $0x8e1be435,%edx
> 
> Code starting with the faulting instruction
> ===========================================
>    0:	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1beb
>    7:	c3                   	ret
>    8:	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1bf3
>    f:	c3                   	ret
>   10:	0f                   	.byte 0xf
>   11:	ba 35 e4 1b 8e       	mov    $0x8e1be435,%edx
> [  696.522062][    C0] EAX: 0001b15d EBX: 984678a0 ECX: 00000006 EDX: 83f6d220
> [  696.522062][    C0] ESI: 988e0820 EDI: 00000001 EBP: 82d17ed8 ESP: 82d17ec0
> [  696.522062][    C0] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00000202
> [  696.522062][    C0] CR0: 80050033 CR2: ffda9000 CR3: 18c90000 CR4: 000406d0
> [  696.522062][    C0] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> [  696.522062][    C0] DR6: fffe0ff0 DR7: 00000400
> [  696.522062][    C0] Call Trace:
> [ 696.522062][ C0] ? show_regs (arch/x86/kernel/dumpstack.c:478 (discriminator 1)) 
> [ 696.522062][ C0] ? watchdog_timer_fn (kernel/watchdog.c:545) 
> [ 696.522062][ C0] ? __hrtimer_run_queues+0x10b/0x196 
> [ 696.522062][ C0] ? schedule_work (drivers/usb/core/hub.c:890) 
> [ 696.522062][ C0] ? hrtimer_run_queues (kernel/time/hrtimer.c:1928) 
> [ 696.522062][ C0] ? update_process_times (kernel/time/timer.c:2065 (discriminator 2) kernel/time/timer.c:2086 (discriminator 2)) 
> [ 696.522062][ C0] ? tick_periodic+0xb0/0xb2 
> [ 696.522062][ C0] ? tick_handle_periodic (kernel/time/tick-common.c:145) 
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076) 
> [ 696.522062][ C0] ? __sysvec_apic_timer_interrupt (arch/x86/include/asm/atomic.h:23 include/linux/atomic/atomic-arch-fallback.h:457 include/linux/jump_label.h:260 include/linux/jump_label.h:270 arch/x86/include/asm/trace/irq_vectors.h:41 arch/x86/kernel/apic/apic.c:1083) 
> [ 696.522062][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 4)) 
> [ 696.522062][ C0] ? handle_exception (arch/x86/entry/entry_32.S:1056) 
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076) 
> [ 696.522062][ C0] ? tick_cancel_sched_timer (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607) 
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076) 
> [ 696.522062][ C0] ? tick_cancel_sched_timer (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607) 
> [ 696.522062][ C0] ? timekeeping_notify (kernel/time/timekeeping.c:1508) 
> [ 696.522062][ C0] __clocksource_select (kernel/time/clocksource.c:1047 (discriminator 1)) 
> [ 696.522062][ C0] ? boot_override_clock (kernel/time/clocksource.c:1079) 
> [ 696.522062][ C0] clocksource_select (kernel/time/clocksource.c:1064) 
> [ 696.522062][ C0] clocksource_done_booting (kernel/time/clocksource.c:1088) 
> [ 696.522062][ C0] do_one_initcall (init/main.c:1236) 
> [ 696.522062][ C0] ? parse_args (kernel/params.c:168) 
> [ 696.522062][ C0] do_initcalls (init/main.c:1297 (discriminator 3) init/main.c:1314 (discriminator 3)) 
> [ 696.522062][ C0] ? rest_init (init/main.c:1433) 
> [ 696.522062][ C0] kernel_init_freeable (init/main.c:1553) 
> [ 696.522062][ C0] kernel_init (init/main.c:1443) 
> [ 696.522062][ C0] ret_from_fork (arch/x86/kernel/process.c:153) 
> [ 696.522062][ C0] ? rest_init (init/main.c:1433) 
> [ 696.522062][ C0] ret_from_fork_asm (arch/x86/entry/entry_32.S:741) 
> [ 696.522062][ C0] entry_INT80_32 (arch/x86/entry/entry_32.S:947) 
> [  696.522062][    C0] Kernel panic - not syncing: softlockup: hung tasks
> [  696.522062][    C0] CPU: 0 PID: 1 Comm: swapper Tainted: G             L     6.8.0-rc2-00006-g5df9197edd73 #1
> [  696.522062][    C0] Call Trace:
> [ 696.522062][ C0] dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1)) 
> [ 696.522062][ C0] dump_stack (lib/dump_stack.c:114) 
> [ 696.522062][ C0] panic (kernel/panic.c:362) 
> [ 696.522062][ C0] watchdog_timer_fn (kernel/watchdog.c:519) 
> [ 696.522062][ C0] __hrtimer_run_queues+0x10b/0x196 
> [ 696.522062][ C0] ? schedule_work (drivers/usb/core/hub.c:890) 
> [ 696.522062][ C0] hrtimer_run_queues (kernel/time/hrtimer.c:1928) 
> [ 696.522062][ C0] update_process_times (kernel/time/timer.c:2065 (discriminator 2) kernel/time/timer.c:2086 (discriminator 2)) 
> [ 696.522062][ C0] tick_periodic+0xb0/0xb2 
> [ 696.522062][ C0] tick_handle_periodic (kernel/time/tick-common.c:145) 
> [ 696.522062][ C0] ? sysvec_hyperv_stimer0 (arch/x86/kernel/apic/apic.c:1076) 
> [ 696.522062][ C0] __sysvec_apic_timer_interrupt (arch/x86/include/asm/atomic.h:23 include/linux/atomic/atomic-arch-fallback.h:457 include/linux/jump_label.h:260 include/linux/jump_label.h:270 arch/x86/include/asm/trace/irq_vectors.h:41 arch/x86/kernel/apic/apic.c:1083) 
> [ 696.522062][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 4)) 
> [ 696.522062][ C0] handle_exception (arch/x86/entry/entry_32.S:1056) 
> [ 696.522062][ C0] EIP: tick_clock_notify (arch/x86/include/asm/bitops.h:55 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/time/tick-sched.c:1607) 
> [ 696.522062][ C0] Code: 15 d4 1b 8e 98 8b 45 e4 8b 55 e8 a3 d8 1b 8e 98 89 15 dc 1b 8e 98 89 35 c0 1b 8e 98 89 1d c4 1b 8e 98 83 c4 10 5b 5e 5f 5d c3 <80> 0d e4 1b 8e 98 01 c3 80 0d e4 1b 8e 98 01 c3 0f ba 35 e4 1b 8e
> All code
> ========
>    0:	15 d4 1b 8e 98       	adc    $0x988e1bd4,%eax
>    5:	8b 45 e4             	mov    -0x1c(%rbp),%eax
>    8:	8b 55 e8             	mov    -0x18(%rbp),%edx
>    b:	a3 d8 1b 8e 98 89 15 	movabs %eax,0x1bdc1589988e1bd8
>   12:	dc 1b 
>   14:	8e 98 89 35 c0 1b    	mov    0x1bc03589(%rax),%ds
>   1a:	8e 98 89 1d c4 1b    	mov    0x1bc41d89(%rax),%ds
>   20:	8e 98 83 c4 10 5b    	mov    0x5b10c483(%rax),%ds
>   26:	5e                   	pop    %rsi
>   27:	5f                   	pop    %rdi
>   28:	5d                   	pop    %rbp
>   29:	c3                   	ret
>   2a:*	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1c15		<-- trapping instruction
>   31:	c3                   	ret
>   32:	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1c1d
>   39:	c3                   	ret
>   3a:	0f                   	.byte 0xf
>   3b:	ba 35 e4 1b 8e       	mov    $0x8e1be435,%edx
> 
> Code starting with the faulting instruction
> ===========================================
>    0:	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1beb
>    7:	c3                   	ret
>    8:	80 0d e4 1b 8e 98 01 	orb    $0x1,-0x6771e41c(%rip)        # 0xffffffff988e1bf3
>    f:	c3                   	ret
>   10:	0f                   	.byte 0xf
>   11:	ba 35 e4 1b 8e       	mov    $0x8e1be435,%edx
> 
> 
> [1]
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20240620/202406201623.d1a3b599-lkp@intel.com
> 
> 
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
> 

View attachment "not-reproduce-config-6.8.0-rc2-00006-g5df9197edd73" of type "text/plain" (175961 bytes)

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