rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=a92/1/0x4000000000000004 softirq=135672/135673 fqs=5250 (t=10502 jiffies g=225237 q=80) NMI backtrace for cpu 0 CPU: 0 PID: 14140 Comm: syz-executor.1 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2795 [inline] rcu_sched_clock_irq.cold+0x4fd/0xc0a kernel/rcu/tree.c:2244 update_process_times+0x2d/0x70 kernel/time/timer.c:1724 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:199 Code: c0 70 f5 f2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 15 dd b2 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 62 ae 0e fa 65 8b 05 93 e5 c1 78 85 c0 74 06 41 RSP: 0000:ffff8880ae809dd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e5eae RBX: ffffffff85c87c90 RCX: 1ffffffff138c63e RDX: dffffc0000000000 RSI: ffffffff8178550e RDI: ffffffff87401838 RBP: ffff8880ae809dd8 R08: ffff888052cb60c0 R09: ffffed1015d04981 R10: ffffed1015d04980 R11: ffff8880ae824c03 R12: ffff8880ae824c00 R13: ffff888094a9ac48 R14: ffff8880ae824c00 R15: dffffc0000000000 expire_timers kernel/time/timer.c:1448 [inline] __run_timers kernel/time/timer.c:1771 [inline] __run_timers kernel/time/timer.c:1738 [inline] run_timer_softirq+0x6ae/0x17f0 kernel/time/timer.c:1784 __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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline] RIP: 0010:lock_release+0x4c0/0x960 kernel/locking/lockdep.c:4509 Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 8c 03 00 00 48 83 3d ff f5 99 07 00 0f 84 7f 01 00 00 48 8b bd 48 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 RSP: 0000:ffff88803af9f5d0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e5eac RBX: 1ffff110075f3ebf RCX: 1ffffffff138c63e RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff88803af9f6a0 R08: 1ffffffff138c000 R09: fffffbfff138c001 R10: fffffbfff138c000 R11: ffffffff89c60007 R12: ffff888052cb60c0 R13: ffffffff81b29633 R14: ffff88803af9f678 R15: ffff888052cb60c0 rcu_lock_release include/linux/rcupdate.h:213 [inline] rcu_read_unlock include/linux/rcupdate.h:653 [inline] __unlock_page_memcg+0x70/0x100 mm/memcontrol.c:2137 unlock_page_memcg+0x2c/0x40 mm/memcontrol.c:2146 page_remove_file_rmap mm/rmap.c:1252 [inline] page_remove_rmap+0x614/0x1190 mm/rmap.c:1303 zap_pte_range mm/memory.c:1059 [inline] zap_pmd_range mm/memory.c:1161 [inline] zap_pud_range mm/memory.c:1190 [inline] zap_p4d_range mm/memory.c:1211 [inline] unmap_page_range+0xd45/0x2170 mm/memory.c:1232 unmap_single_vma+0x19d/0x300 mm/memory.c:1277 unmap_vmas+0x135/0x280 mm/memory.c:1309 exit_mmap+0x2ba/0x530 mm/mmap.c:3145 __mmput kernel/fork.c:1066 [inline] mmput+0x179/0x4d0 kernel/fork.c:1087 exit_mm kernel/exit.c:547 [inline] do_exit+0x84e/0x2e50 kernel/exit.c:866 do_group_exit+0x135/0x360 kernel/exit.c:983 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: 0033:0x4598e9 Code: Bad RIP value. RSP: 002b:00007f80e0875c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004598e9 RDX: 000000000000001b RSI: 0000000000000029 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000020 R09: 0000000000000000 R10: 0000000020000140 R11: 0000000000000246 R12: 00007f80e08766d4 R13: 00000000004cf050 R14: 00000000004ddb60 R15: 00000000ffffffff