INFO: rcu_preempt detected stalls on CPUs/tasks: Tasks blocked on level-0 rcu_node (CPUs 0-1): P30341 (detected by 0, t=10503 jiffies, g=953, c=952, q=254578) syz-executor052 R running task 30200 30341 2095 0x00000004 ffff8801db607c60 ffffffff813fabdd ffffffff813fa9e4 ffff8801ccd7c740 ffffffff830d17c0 0000000000000096 ffff8801ccd7cb20 dffffc0000000000 ffff8801db607c98 ffffffff81405319 00000000000003b8 000000000003e272 Call Trace: [ 491.254223] [] sched_show_task.cold.35+0x279/0x31f kernel/sched/core.c:5317 [] rcu_print_detail_task_stall_rnp+0xc2/0xfe kernel/rcu/tree_plugin.h:530 [] rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:543 [inline] [] print_other_cpu_stall kernel/rcu/tree.c:1408 [inline] [] check_cpu_stall kernel/rcu/tree.c:1520 [inline] [] __rcu_pending kernel/rcu/tree.c:3487 [inline] [] rcu_pending kernel/rcu/tree.c:3551 [inline] [] rcu_check_callbacks.cold.69+0x757/0xd27 kernel/rcu/tree.c:2880 [] update_process_times+0x30/0x70 kernel/time/timer.c:1629 [] tick_sched_handle.isra.5+0x4a/0xf0 kernel/time/tick-sched.c:151 [] tick_sched_timer+0x76/0x130 kernel/time/tick-sched.c:1190 [] __run_hrtimer kernel/time/hrtimer.c:1255 [inline] [] __hrtimer_run_queues+0x357/0xe30 kernel/time/hrtimer.c:1319 [] hrtimer_interrupt+0x1b1/0x430 kernel/time/hrtimer.c:1353 [] local_apic_timer_interrupt+0x74/0xa0 arch/x86/kernel/apic/apic.c:937 [] smp_apic_timer_interrupt+0x7c/0xb0 arch/x86/kernel/apic/apic.c:961 [] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:648 [ 491.371385] [] ? arch_local_irq_enable arch/x86/include/asm/paravirt.h:778 [inline] [ 491.371385] [] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:170 [inline] [ 491.371385] [] ? _raw_spin_unlock_irq+0x2e/0x50 kernel/locking/spinlock.c:199 [] __schedule+0x1010/0x1b10 kernel/sched/core.c:3501 [] preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:3711 [] retint_kernel+0x1b/0x2d [] preempt_schedule+0x25/0x30 kernel/sched/core.c:3634 [] ___preempt_schedule+0x16/0x18 [] __sched_setscheduler+0x1c12/0x2c30 kernel/sched/core.c:4407 [] sched_setattr kernel/sched/core.c:4449 [inline] [] SYSC_sched_setattr kernel/sched/core.c:4623 [inline] [] SyS_sched_setattr+0x24c/0x3c0 kernel/sched/core.c:4602 [] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb syz-executor052 R running task 30200 30341 2095 0x80000004 ffff8801db607c60 ffffffff813fabdd ffffffff813fa9e4 ffff8801ccd7c740 ffffffff830d17c0 0000000000000096 ffff8801ccd7cb20 dffffc0000000000 ffff8801db607c98 ffffffff81405319 ffffffff830d1b40 000000000003e272 Call Trace: [ 491.523864] [] sched_show_task.cold.35+0x279/0x31f kernel/sched/core.c:5317 [] rcu_print_detail_task_stall_rnp+0xc2/0xfe kernel/rcu/tree_plugin.h:530 [] rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:545 [inline] [] print_other_cpu_stall kernel/rcu/tree.c:1408 [inline] [] check_cpu_stall kernel/rcu/tree.c:1520 [inline] [] __rcu_pending kernel/rcu/tree.c:3487 [inline] [] rcu_pending kernel/rcu/tree.c:3551 [inline] [] rcu_check_callbacks.cold.69+0x7af/0xd27 kernel/rcu/tree.c:2880 [] update_process_times+0x30/0x70 kernel/time/timer.c:1629 [] tick_sched_handle.isra.5+0x4a/0xf0 kernel/time/tick-sched.c:151 [] tick_sched_timer+0x76/0x130 kernel/time/tick-sched.c:1190 [] __run_hrtimer kernel/time/hrtimer.c:1255 [inline] [] __hrtimer_run_queues+0x357/0xe30 kernel/time/hrtimer.c:1319 [] hrtimer_interrupt+0x1b1/0x430 kernel/time/hrtimer.c:1353 [] local_apic_timer_interrupt+0x74/0xa0 arch/x86/kernel/apic/apic.c:937 [] smp_apic_timer_interrupt+0x7c/0xb0 arch/x86/kernel/apic/apic.c:961 [] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:648 [ 491.641294] [] ? arch_local_irq_enable arch/x86/include/asm/paravirt.h:778 [inline] [ 491.641294] [] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:170 [inline] [ 491.641294] [] ? _raw_spin_unlock_irq+0x2e/0x50 kernel/locking/spinlock.c:199 [] __schedule+0x1010/0x1b10 kernel/sched/core.c:3501 [] preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:3711 [] retint_kernel+0x1b/0x2d [] preempt_schedule+0x25/0x30 kernel/sched/core.c:3634 [] ___preempt_schedule+0x16/0x18 [] __sched_setscheduler+0x1c12/0x2c30 kernel/sched/core.c:4407 [] sched_setattr kernel/sched/core.c:4449 [inline] [] SYSC_sched_setattr kernel/sched/core.c:4623 [inline] [] SyS_sched_setattr+0x24c/0x3c0 kernel/sched/core.c:4602 [] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb