rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=165997, q=259) rcu: All QSes seen, last rcu_preempt kthread activity 10493 (4295077278-4295066785), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.2 R running task 24872 5149 8567 0x80004008 Call Trace: sched_show_task kernel/sched/core.c:5935 [inline] sched_show_task.cold+0x2ed/0x34e kernel/sched/core.c:5910 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline] check_cpu_stall kernel/rcu/tree_stall.h:538 [inline] rcu_pending kernel/rcu/tree.c:2795 [inline] rcu_sched_clock_irq.cold+0xafc/0xc12 kernel/rcu/tree.c:2244 update_process_times+0x2d/0x70 kernel/time/timer.c:1726 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1299 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline] RIP: 0010:lock_acquire+0x20b/0x410 kernel/locking/lockdep.c:4490 Code: 9c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 d3 01 00 00 48 83 3d 91 d0 99 07 00 0f 84 53 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b RSP: 0018:ffff8880ae809c00 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e6394 RBX: ffff88805b6b4600 RCX: ffffffff8158ff72 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286 RBP: ffff8880ae809c48 R08: 00000000000065ed R09: fffffbfff14edb43 R10: ffff88805b6b4f18 R11: ffff88805b6b4600 R12: ffff88805c2f6900 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] pie_timer+0x9e/0x830 net/sched/sch_pie.c:449 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:rcu_read_lock include/linux/rcupdate.h:600 [inline] RIP: 0010:lock_page_memcg+0x4a/0x240 mm/memcontrol.c:2089 Code: c0 31 f6 68 80 3f b3 81 b9 02 00 00 00 48 c7 c7 00 ae fa 88 e8 57 0a a6 ff e8 a2 4b ac ff 5a 85 c0 74 0d 80 3d 9e 50 0e 08 00 <0f> 84 e8 00 00 00 0f 1f 44 00 00 48 8d 43 38 48 89 c2 48 89 45 d0 RSP: 0018:ffff888038c6f690 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: ffffea00019fefc0 RCX: 1ffffffff138b82e RDX: ffffffff81b33f80 RSI: 0000000000000008 RDI: ffff88805b6b4e9c RBP: ffff888038c6f6c8 R08: 1ffffffff14edb2c R09: fffffbfff14edb2d R10: ffff88805b6b4ec8 R11: ffff88805b6b4600 R12: ffffea00019fefc0 R13: 0000000000000000 R14: ffffea00019fefc8 R15: dead000000000100 page_remove_file_rmap mm/rmap.c:1217 [inline] page_remove_rmap+0x5d6/0x1190 mm/rmap.c:1304 zap_pte_range mm/memory.c:1062 [inline] zap_pmd_range mm/memory.c:1166 [inline] zap_pud_range mm/memory.c:1195 [inline] zap_p4d_range mm/memory.c:1216 [inline] unmap_page_range+0xd82/0x25f0 mm/memory.c:1237 unmap_single_vma+0x19d/0x300 mm/memory.c:1282 unmap_vmas+0x189/0x300 mm/memory.c:1314 exit_mmap+0x2ba/0x530 mm/mmap.c:3176 __mmput kernel/fork.c:1079 [inline] mmput+0x179/0x4d0 kernel/fork.c:1100 exit_mm kernel/exit.c:485 [inline] do_exit+0x823/0x2e60 kernel/exit.c:804 do_group_exit+0x135/0x360 kernel/exit.c:921 get_signal+0x47c/0x2500 kernel/signal.c:2734 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x65f/0x760 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a59 Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9964c81cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 0000000000459a59 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c R13: 00007ffcb471a2cf R14: 00007f9964c829c0 R15: 000000000075bf2c