rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=5c2/1/0x4000000000000004 softirq=30561/30561 fqs=4757 
	(t=10500 jiffies g=28197 q=271309)
NMI backtrace for cpu 0
CPU: 0 PID: 12228 Comm: syz-executor.2 Not tainted 5.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1e9/0x30e lib/dump_stack.c:118
 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x199/0x2a0 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:475 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:549 [inline]
 rcu_pending kernel/rcu/tree.c:3225 [inline]
 rcu_sched_clock_irq+0x186a/0x1ac0 kernel/rcu/tree.c:2296
 update_process_times+0x12c/0x180 kernel/time/timer.c:1727
 tick_sched_handle kernel/time/tick-sched.c:176 [inline]
 tick_sched_timer+0x254/0x410 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x48e/0x9b0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:twsk_destructor include/net/timewait_sock.h:32 [inline]
RIP: 0010:inet_twsk_free net/ipv4/inet_timewait_sock.c:69 [inline]
RIP: 0010:inet_twsk_put+0xcf/0x1a0 net/ipv4/inet_timewait_sock.c:80
Code: 3c 28 00 74 08 48 89 df e8 3e e6 e6 fa 48 8b 1b 48 83 c3 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 21 e6 e6 fa <48> 8b 1b 48 85 db 0f 84 90 00 00 00 e8 10 c1 a9 fa 4c 89 e7 ff d3
RSP: 0018:ffffc90000007d18 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff12b9978 RBX: ffffffff895ccbc0 RCX: 0000000000000102
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff895ccb18
RBP: 1ffff11013f345a0 R08: ffffffff86cb1ff2 R09: ffffed1013f345ac
R10: ffffed1013f345ac R11: 0000000000000000 R12: ffff88809f9a2cd8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88809f9a2d00
 call_timer_fn+0x91/0x160 kernel/time/timer.c:1405
 expire_timers kernel/time/timer.c:1450 [inline]
 __run_timers+0x776/0x970 kernel/time/timer.c:1774
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1787
 __do_softirq+0x268/0x80c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x223/0x230 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1140
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x57/0x80 kernel/locking/spinlock.c:199
Code: 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 80 9d 2b 89 e8 9a f1 ab f9 48 83 3d 72 88 25 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 9f 4d 4b f9 65 8b 05 24 09 fc 77 85 c0 74 02 5b
RSP: 0018:ffffc90005587630 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff12573b0 RBX: ffff8880ae8374c0 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff88804bba69a4
RBP: ffffc90005587690 R08: ffffffff817a6f90 R09: ffffed1015d06e99
R10: ffffed1015d06e99 R11: 0000000000000000 R12: ffff8880ae8374c0
R13: ffff88804bba6140 R14: ffff8880ae837ec8 R15: dffffc0000000000
 finish_task_switch+0x24f/0x550 kernel/sched/core.c:3217
 context_switch kernel/sched/core.c:3381 [inline]
 __schedule+0x80d/0xc90 kernel/sched/core.c:4094
 preempt_schedule_common kernel/sched/core.c:4249 [inline]
 preempt_schedule+0xc8/0x110 kernel/sched/core.c:4274
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:50
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:393 [inline]
 zap_pte_range+0x1742/0x1c00 mm/memory.c:1136
 zap_pmd_range mm/memory.c:1184 [inline]
 zap_pud_range mm/memory.c:1213 [inline]
 zap_p4d_range mm/memory.c:1234 [inline]
 unmap_page_range+0x9a0/0xb00 mm/memory.c:1255
 unmap_vmas+0x15d/0x2c0 mm/memory.c:1332
 exit_mmap+0x276/0x530 mm/mmap.c:3126
 __mmput+0x113/0x350 kernel/fork.c:1082
 exit_mm+0x4cd/0x550 kernel/exit.c:479
 do_exit+0x56e/0x1f80 kernel/exit.c:782
 do_group_exit+0x15e/0x2c0 kernel/exit.c:893
 get_signal+0x13cf/0x1d60 kernel/signal.c:2739
 do_signal+0x33/0x610 arch/x86/kernel/signal.c:784
 exit_to_usermode_loop arch/x86/entry/common.c:161 [inline]
 prepare_exit_to_usermode+0x32a/0x600 arch/x86/entry/common.c:196
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c849
Code: 24 78 48 39 c2 74 12 c6 84 24 90 00 00 00 00 48 8b 6c 24 58 48 83 c4 60 c3 48 8b 44 24 70 48 89 04 24 48 89 4c 24 08 48 89 54 <24> 10 e8 d0 5c fa ff 80 7c 24 18 00 74 cf 48 8b 44 24 38 48 8b 48
RSP: 002b:00007fdef9803c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: 0000000000000009 RBX: 00007fdef98046d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000077e R14: 00000000004ca314 R15: 000000000076bf0c