rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=272/1/0x4000000000000004 softirq=230957/230957 fqs=5056 
rcu: 	 (t=10500 jiffies g=308881 q=154462)
NMI backtrace for cpu 0
CPU: 0 PID: 18963 Comm: syz-executor.2 Not tainted 4.19.145-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+0x1fc/0x2fe lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682
 update_process_times+0x2a/0xb0 kernel/time/timer.c:1650
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278
 __run_hrtimer kernel/time/hrtimer.c:1401 [inline]
 __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3910
Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d d9 c7 80 07 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b
RSP: 0018:ffff8880ae607cc0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4b69 RBX: ffff88809ade4600 RCX: 0000000000000683
RDX: dffffc0000000000 RSI: 00000000843671df RDI: 0000000000000282
RBP: ffff8880ae607d48 R08: ffffffff8b3efc98 R09: 0000000000000000
R10: ffff88809ade4e88 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
 call_timer_fn+0x113/0x700 kernel/time/timer.c:1335
 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1703 [inline]
 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1716
 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x215/0x260 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3744
Code: 00 00 e8 5d be 09 fa e8 b8 00 31 fa 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d bb 77 94 01 00 74 5b fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 40 d1 ff ff 48 c7 c0 50 5b d2 88 48 c1 e8 03 80
RSP: 0018:ffff88806b507760 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4b6b RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88809ade4e84
RBP: ffffed10135bc8c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809ade4600
R13: ffffffff88d25b58 R14: 0000000000000000 R15: 0000000000000000
 retint_kernel+0x1b/0x2d
RIP: 0010:PageTable include/linux/page-flags.h:721 [inline]
RIP: 0010:__ClearPageTable include/linux/page-flags.h:721 [inline]
RIP: 0010:pgtable_page_dtor include/linux/mm.h:1941 [inline]
RIP: 0010:___pte_free_tlb+0x6d/0x190 arch/x86/mm/pgtable.c:64
Code: 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e ea 00 00 00 8b 5d 30 bf 00 00 00 f0 <41> 89 dd 41 81 e5 00 04 00 f0 44 89 ee e8 a1 f1 38 00 41 81 fd 00
RSP: 0018:ffff88806b507838 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 00000000fffffbff RCX: 0000000000000000
RDX: 1ffffd40004fd3a6 RSI: 00000000ffffffff RDI: 00000000f0000000
RBP: ffffea00027e9d00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff88806b5079b0
R13: ffffea00027e9d00 R14: ffffffffffffffff R15: 0000000000000001
 __pte_free_tlb arch/x86/include/asm/pgalloc.h:73 [inline]
 free_pte_range mm/memory.c:445 [inline]
 free_pmd_range mm/memory.c:463 [inline]
 free_pud_range mm/memory.c:497 [inline]
 free_p4d_range mm/memory.c:531 [inline]
 free_pgd_range+0xa94/0x1020 mm/memory.c:611
 free_pgtables+0x230/0x2f0 mm/memory.c:643
 exit_mmap+0x2c8/0x530 mm/mmap.c:3092
 __mmput kernel/fork.c:1015 [inline]
 mmput+0x14e/0x4a0 kernel/fork.c:1036
 exit_mm kernel/exit.c:546 [inline]
 do_exit+0xab5/0x2b70 kernel/exit.c:874
 do_group_exit+0x125/0x310 kernel/exit.c:990
 get_signal+0x3f2/0x1f70 kernel/signal.c:2588
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198
 retint_user+0x8/0x18
RIP: 0033:0x45d5f9
Code: Bad RIP value.
RSP: 002b:00007fedf89f1c78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 0000000000003500 RCX: 000000000045d5f9
RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffe64439f5f R14: 00007fedf89f29c0 R15: 000000000118cf4c