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[swapper/0:1] [ 699.775553][ C0] CPU#0 Utilization every 96000ms during lockup: [ 699.775553][ C0] #1: 26% system, 0% softirq, 0% hardirq, 0% idle [ 699.775553][ C0] #2: 25% system, 0% softirq, 0% hardirq, 0% idle [ 699.775553][ C0] #3: 25% system, 0% softirq, 0% hardirq, 0% idle [ 699.775553][ C0] #4: 34% system, 0% softirq, 0% hardirq, 0% idle [ 699.775553][ C0] #5: 100% system, 0% softirq, 0% hardirq, 0% idle [ 699.775553][ C0] Modules linked in: [ 699.775553][ C0] irq event stamp: 201566 [ 699.775553][ C0] hardirqs last enabled at (201565): timekeeping_notify (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:119 arch/x86/include/asm/irqflags.h:159 include/linux/stop_machine.h:172 include/linux/stop_machine.h:179 kernel/time/timekeeping.c:1634) [ 699.775553][ C0] hardirqs last disabled at (201566): sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1052) [ 699.775553][ C0] softirqs last enabled at (200324): handle_softirqs (kernel/softirq.c:469 (discriminator 2) kernel/softirq.c:650 (discriminator 2)) [ 699.775553][ C0] softirqs last disabled at (200309): __do_softirq (kernel/softirq.c:657) [ 699.775553][ C0] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.0-rc2-00020-g318e18ed22e8 #1 PREEMPT(full) [ 699.775553][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 699.775553][ 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:1633) [ 699.775553][ C0] Code: 8b 45 e4 89 1d 24 d5 6a 83 a3 38 d5 6a 83 89 15 3c d5 6a 83 83 c4 10 5b 5e 5f 5d c3 2e 8d b4 26 00 00 00 00 8d b6 00 00 00 00 <80> 0d 44 d5 6a 83 01 c3 2e 8d b4 26 00 00 00 00 80 0d 44 d5 6a 83 All code ======== 0: 8b 45 e4 mov -0x1c(%rbp),%eax 3: 89 1d 24 d5 6a 83 mov %ebx,-0x7c952adc(%rip) # 0xffffffff836ad52d 9: a3 38 d5 6a 83 89 15 movabs %eax,0xd53c1589836ad538 10: 3c d5 12: 6a 83 push $0xffffffffffffff83 14: 83 c4 10 add $0x10,%esp 17: 5b pop %rbx 18: 5e pop %rsi 19: 5f pop %rdi 1a: 5d pop %rbp 1b: c3 ret 1c: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi 23: 00 24: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi 2a:* 80 0d 44 d5 6a 83 01 orb $0x1,-0x7c952abc(%rip) # 0xffffffff836ad575 <-- trapping instruction 31: c3 ret 32: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi 39: 00 3a: 80 .byte 0x80 3b: 0d 44 d5 6a 83 or $0x836ad544,%eax Code starting with the faulting instruction =========================================== 0: 80 0d 44 d5 6a 83 01 orb $0x1,-0x7c952abc(%rip) # 0xffffffff836ad54b 7: c3 ret 8: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi f: 00 10: 80 .byte 0x80 11: 0d 44 d5 6a 83 or $0x836ad544,%eax [ 699.775553][ C0] EAX: 0003135d EBX: 8322ef00 ECX: 00000006 EDX: 82f6bcac [ 699.775553][ C0] ESI: 00000200 EDI: 836ac3e0 EBP: 84c97ed8 ESP: 84c97ebc [ 699.775553][ C0] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00000202 [ 699.775553][ C0] CR0: 80050033 CR2: ffdaa000 CR3: 03aeb000 CR4: 000406d0 [ 699.775553][ C0] Call Trace: [ 699.775553][ C0] ? timekeeping_notify (kernel/time/timekeeping.c:1636) [ 699.775553][ C0] __clocksource_select (kernel/time/clocksource.c:1069 (discriminator 1)) [ 699.775553][ C0] ? boot_override_clock (kernel/time/clocksource.c:1101) [ 699.775553][ C0] clocksource_select (kernel/time/clocksource.c:1086) [ 699.775553][ C0] clocksource_done_booting (kernel/time/clocksource.c:1110) [ 699.775553][ C0] do_one_initcall (init/main.c:1283) [ 699.775553][ C0] ? rdinit_setup (init/main.c:1331) [ 699.775553][ C0] do_initcalls (init/main.c:1344 (discriminator 3) init/main.c:1361 (discriminator 3)) [ 699.775553][ C0] kernel_init_freeable (init/main.c:1597) [ 699.775553][ C0] ? rest_init (init/main.c:1475) [ 699.775553][ C0] kernel_init (init/main.c:1485) [ 699.775553][ C0] ret_from_fork (arch/x86/kernel/process.c:164) [ 699.775553][ C0] ? rest_init (init/main.c:1475) [ 699.775553][ C0] ret_from_fork_asm (arch/x86/entry/entry_32.S:737) [ 699.775553][ C0] entry_INT80_32 (arch/x86/entry/entry_32.S:945) [ 699.775553][ C0] Kernel panic - not syncing: softlockup: hung tasks [ 699.775553][ C0] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G L 6.18.0-rc2-00020-g318e18ed22e8 #1 PREEMPT(full) [ 699.775553][ C0] Tainted: [L]=SOFTLOCKUP [ 699.775553][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 699.775553][ C0] Call Trace: [ 699.775553][ C0] dump_stack_lvl (lib/dump_stack.c:122) [ 699.775553][ C0] dump_stack (lib/dump_stack.c:130) [ 699.775553][ C0] vpanic (kernel/panic.c:487) [ 699.775553][ C0] panic (kernel/panic.c:626) [ 699.775553][ C0] watchdog_timer_fn (kernel/watchdog.c:753) [ 699.775553][ C0] __hrtimer_run_queues+0x125/0x1e0 [ 699.775553][ C0] ? schedule_work (drivers/usb/core/hub.c:925) [ 699.775553][ C0] hrtimer_run_queues (kernel/time/hrtimer.c:1999) [ 699.775553][ C0] update_process_times (kernel/time/timer.c:2416 kernel/time/timer.c:2472) [ 699.775553][ C0] tick_periodic (kernel/time/tick-common.c:103) [ 699.775553][ C0] tick_handle_periodic (kernel/time/tick-common.c:144) [ 699.775553][ C0] ? vmware_sched_clock (arch/x86/kernel/apic/apic.c:1052) [ 699.775553][ C0] __sysvec_apic_timer_interrupt (arch/x86/include/asm/trace/irq_vectors.h:40 (discriminator 4) arch/x86/include/asm/trace/irq_vectors.h:40 (discriminator 4) arch/x86/kernel/apic/apic.c:1059 (discriminator 4)) [ 699.775553][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1052 (discriminator 2) arch/x86/kernel/apic/apic.c:1052 (discriminator 2)) [ 699.775553][ C0] handle_exception (arch/x86/entry/entry_32.S:1055) [ 699.775553][ 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:1633) [ 699.775553][ C0] Code: 8b 45 e4 89 1d 24 d5 6a 83 a3 38 d5 6a 83 89 15 3c d5 6a 83 83 c4 10 5b 5e 5f 5d c3 2e 8d b4 26 00 00 00 00 8d b6 00 00 00 00 <80> 0d 44 d5 6a 83 01 c3 2e 8d b4 26 00 00 00 00 80 0d 44 d5 6a 83 All code ======== 0: 8b 45 e4 mov -0x1c(%rbp),%eax 3: 89 1d 24 d5 6a 83 mov %ebx,-0x7c952adc(%rip) # 0xffffffff836ad52d 9: a3 38 d5 6a 83 89 15 movabs %eax,0xd53c1589836ad538 10: 3c d5 12: 6a 83 push $0xffffffffffffff83 14: 83 c4 10 add $0x10,%esp 17: 5b pop %rbx 18: 5e pop %rsi 19: 5f pop %rdi 1a: 5d pop %rbp 1b: c3 ret 1c: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi 23: 00 24: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi 2a:* 80 0d 44 d5 6a 83 01 orb $0x1,-0x7c952abc(%rip) # 0xffffffff836ad575 <-- trapping instruction 31: c3 ret 32: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi 39: 00 3a: 80 .byte 0x80 3b: 0d 44 d5 6a 83 or $0x836ad544,%eax Code starting with the faulting instruction =========================================== 0: 80 0d 44 d5 6a 83 01 orb $0x1,-0x7c952abc(%rip) # 0xffffffff836ad54b 7: c3 ret 8: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi f: 00 10: 80 .byte 0x80 11: 0d 44 d5 6a 83 or $0x836ad544,%eax The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251216/202512161547.cd3a9187-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki