INFO: rcu_preempt self-detected stall on CPU 0-...: (10499 ticks this GP) idle=e2b/140000000000001/0 softirq=13838/13838 fqs=5238 (t=10500 jiffies g=4058 c=4057 q=392) Task dump for CPU 0: syz-executor.0 R running task 26696 7820 2140 0x0000000c ffff8801db607c40 ffffffff813fc681 ffffffff813fc480 0000000000000001 0000000000000000 ffff8801db621000 dffffc0000000000 ffffffff830d5948 ffffffff830d5980 ffff8801db607c60 ffffffff813fcb4c ffffffff830d5900 Call Trace: <IRQ> [ 324.775055] [<ffffffff813fc681>] sched_show_task.cold+0x27f/0x327 kernel/sched/core.c:5312 [<ffffffff813fcb4c>] dump_cpu_task+0x7a/0x7f kernel/sched/core.c:9050 [<ffffffff81407359>] rcu_dump_cpu_stacks+0x193/0x1c3 kernel/rcu/tree.c:1303 [<ffffffff8140805e>] print_cpu_stall kernel/rcu/tree.c:1446 [inline] [<ffffffff8140805e>] check_cpu_stall kernel/rcu/tree.c:1514 [inline] [<ffffffff8140805e>] __rcu_pending kernel/rcu/tree.c:3495 [inline] [<ffffffff8140805e>] rcu_pending kernel/rcu/tree.c:3559 [inline] [<ffffffff8140805e>] rcu_check_callbacks.cold+0x44a/0xd2f kernel/rcu/tree.c:2888 [<ffffffff81267a21>] update_process_times+0x31/0x70 kernel/time/timer.c:1629 [<ffffffff81296a8a>] tick_sched_handle.isra.0+0x4a/0xf0 kernel/time/tick-sched.c:151 [<ffffffff81296baa>] tick_sched_timer+0x7a/0x130 kernel/time/tick-sched.c:1190 [<ffffffff8126a6a3>] __run_hrtimer kernel/time/hrtimer.c:1255 [inline] [<ffffffff8126a6a3>] __hrtimer_run_queues+0x313/0xe00 kernel/time/hrtimer.c:1319 [<ffffffff8126cbd6>] hrtimer_interrupt+0x1b6/0x450 kernel/time/hrtimer.c:1353 [<ffffffff81090386>] local_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:937 [<ffffffff82810139>] smp_apic_timer_interrupt+0x79/0xb0 arch/x86/kernel/apic/apic.c:961 [<ffffffff8280d9ad>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:648 <EOI> [ 324.890389] [<ffffffff813bfd46>] ? perf_output_read_group kernel/events/core.c:5738 [inline] <EOI> [ 324.890389] [<ffffffff813bfd46>] ? perf_output_read+0x5d6/0x12e0 kernel/events/core.c:5779 [<ffffffff813bfd46>] perf_output_read_group kernel/events/core.c:5738 [inline] [<ffffffff813bfd46>] perf_output_read+0x5d6/0x12e0 kernel/events/core.c:5779 [<ffffffff813e0e72>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821 [<ffffffff813e24d9>] __perf_event_output kernel/events/core.c:6093 [inline] [<ffffffff813e24d9>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106 [<ffffffff813cd371>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7206 [<ffffffff813cda8c>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7282 [<ffffffff813cdccc>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7315 [<ffffffff813e4f69>] do_perf_sw_event kernel/events/core.c:7423 [inline] [<ffffffff813e4f69>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7454 [<ffffffff813e51d7>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7466 [<ffffffff810b1d3d>] perf_sw_event include/linux/perf_event.h:1045 [inline] [<ffffffff810b1d3d>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1447 [<ffffffff810b2128>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1469 [<ffffffff8280d235>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:951 [<ffffffff8152a77a>] pipe_write+0x25a/0xe40 fs/pipe.c:447 [<ffffffff8150de71>] new_sync_write fs/read_write.c:498 [inline] [<ffffffff8150de71>] __vfs_write+0x3c1/0x560 fs/read_write.c:511 [<ffffffff81510755>] vfs_write+0x185/0x520 fs/read_write.c:559 [<ffffffff8151452c>] SYSC_write fs/read_write.c:606 [inline] [<ffffffff8151452c>] SyS_write+0xdc/0x1c0 fs/read_write.c:598 [<ffffffff810056bd>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [<ffffffff8280c213>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb INFO: rcu_sched detected stalls on CPUs/tasks: 0-...: (1 GPs behind) idle=e2b/140000000000000/0 softirq=13823/13838 fqs=5236 (detected by 1, t=10553 jiffies, g=240, c=239, q=2) Task dump for CPU 0: syz-executor.0 R running task 26696 7820 2140 0x8000000c 0000000000000000 0000000000000000 0000000005080021 0000000000000010 ffff8801c4f877d0 ffffffff812441d1 ffff8801c4f87888 0000000000000246 ffff8801c4f87820 ffffffff81bafe1c 0000000000000000 000060fe24614dc0 Call Trace: