rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=62a/1/0x4000000000000000 softirq=37902/37902 fqs=0 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 1 PID: 17177 at kernel/sched/core.c:3489 try_invoke_on_locked_down_task+0x18c/0x300 kernel/sched/core.c:3489 Modules linked in: CPU: 1 PID: 17177 Comm: syz-executor.2 Not tainted 5.10.0-next-20201216-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:try_invoke_on_locked_down_task+0x18c/0x300 kernel/sched/core.c:3489 Code: 00 00 00 0f 85 34 01 00 00 48 83 c4 70 44 89 f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b 05 78 b5 b3 7e 85 c0 0f 85 15 ff ff ff <0f> 0b e9 0e ff ff ff 48 8d 74 24 30 48 89 ef 49 c7 c6 40 4c 03 00 RSP: 0018:ffffc90000dc0bb0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff920001b8178 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff815eb390 RDI: ffff88802b989b00 RBP: ffff88802b989b00 R08: 0000000000000000 R09: ffffffff8b799803 R10: fffffbfff16f3300 R11: 0000000000000000 R12: ffffffff815eb390 R13: ffffc90000dc0cd0 R14: ffffffff8b7998c8 R15: ffffffff8b799800 FS: 00007f50f6524700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0f90f8e030 CR3: 0000000023a22000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_print_task_stall kernel/rcu/tree_stall.h:284 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:501 [inline] check_cpu_stall kernel/rcu/tree_stall.h:652 [inline] rcu_pending kernel/rcu/tree.c:3751 [inline] rcu_sched_clock_irq.cold+0xc27/0xf90 kernel/rcu/tree.c:2580 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1376 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1c0/0xea0 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x960 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x550 arch/x86/kernel/apic/apic.c:1102 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:csd_lock_wait kernel/smp.c:227 [inline] RIP: 0010:smp_call_function_single+0x1b0/0x4b0 kernel/smp.c:512 Code: 10 8b 7c 24 1c 48 8d 74 24 40 48 89 44 24 50 48 8b 44 24 08 48 89 44 24 58 e8 0c fb ff ff 41 89 c5 eb 07 e8 52 7f 0b 00 f3 90 <44> 8b 64 24 48 31 ff 41 83 e4 01 44 89 e6 e8 bd 86 0b 00 45 85 e4 RSP: 0018:ffffc9000362fc00 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 1ffff920006c5f84 RCX: ffffc9000d4cb000 RDX: 0000000000040000 RSI: ffffffff8166f60e RDI: 0000000000000003 RBP: ffffc9000362fcd8 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8166f623 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000008 smp_call_function_many_cond+0x27d/0x9e0 kernel/smp.c:648 smp_call_function_many kernel/smp.c:711 [inline] smp_call_function kernel/smp.c:733 [inline] on_each_cpu+0x4f/0x110 kernel/smp.c:832 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:871 do_settimeofday64 kernel/time/timekeeping.c:1327 [inline] do_settimeofday64+0x3cb/0x5b0 kernel/time/timekeeping.c:1293 do_sys_settimeofday64 kernel/time/time.c:195 [inline] do_sys_settimeofday64+0x1de/0x260 kernel/time/time.c:169 __do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline] __x64_sys_clock_settime+0x1a1/0x280 kernel/time/posix-timers.c:1067 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f50f6523c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000000 RBP: 000000000119bfb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fffda721aaf R14: 00007f50f65249c0 R15: 000000000119bf8c