rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=816/1/0x4000000000000000 softirq=27175/27184 fqs=4622 
	(t=10500 jiffies g=25389 q=508587)
NMI backtrace for cpu 0
CPU: 0 PID: 13255 Comm: syz-executor.2 Not tainted 5.10.0-rc5-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+0x107/0x163 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x1e3/0x21e kernel/rcu/tree_stall.h:331
 print_cpu_stall kernel/rcu/tree_stall.h:563 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:637 [inline]
 rcu_pending kernel/rcu/tree.c:3694 [inline]
 rcu_sched_clock_irq.cold+0x472/0xee8 kernel/rcu/tree.c:2567
 update_process_times+0x77/0xd0 kernel/time/timer.c:1709
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:164 [inline]
RIP: 0010:unwind_next_frame+0x280/0x1f90 arch/x86/kernel/unwind_orc.c:443
Code: 89 54 24 20 48 89 4c 24 18 e8 6c ab 81 00 4c 8b 44 24 30 48 8b 74 24 28 44 8b 54 24 20 48 8b 4c 24 18 46 8b 1c 85 50 e6 fa 8d <44> 8d 46 01 48 ba 00 00 00 00 00 fc ff df 4a 8d 3c 85 50 e6 fa 8d
RSP: 0018:ffffc900000077c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000000f00 RCX: ffffffff81a169a7
RDX: 0000000000000007 RSI: 000000000000a169 RDI: ffffffff8dfd6bf4
RBP: 0000000000000001 R08: 000000000000a169 R09: 0000000000000000
R10: 0000000000082081 R11: 00000000000265a1 R12: ffffc900000078e0
R13: ffffc900000078cd R14: ffffc900000078e8 R15: ffffc90000007898
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
 __kasan_slab_free+0x102/0x140 mm/kasan/common.c:422
 slab_free_hook mm/slub.c:1544 [inline]
 slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1577
 slab_free mm/slub.c:3142 [inline]
 kmem_cache_free+0x82/0x350 mm/slub.c:3158
 inet_bind_bucket_destroy net/ipv4/inet_hashtables.c:91 [inline]
 inet_bind_bucket_destroy+0xdf/0x120 net/ipv4/inet_hashtables.c:87
 inet_twsk_bind_unhash+0x121/0x1b0 net/ipv4/inet_timewait_sock.c:39
 inet_twsk_kill+0x21d/0x470 net/ipv4/inet_timewait_sock.c:59
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1410
 expire_timers kernel/time/timer.c:1455 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1747
 __run_timers kernel/time/timer.c:1728 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1760
 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x132/0x200 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:4789
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 12 6d 64 f8 e8 ed d2 8e f8 fb bf 01 00 00 00 <e8> 82 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 80 55 64
RSP: 0018:ffffc9000943f6c8 EFLAGS: 00000206
RAX: 00000000002af60f RBX: ffff8880110fcec0 RCX: 1ffffffff19d8db9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed100221f9d8 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit_cond_resched kernel/entry/common.c:357 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:349 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:387
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:ptlock_ptr include/linux/mm.h:2139 [inline]
RIP: 0010:pte_lockptr include/linux/mm.h:2163 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1211 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1357 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1386 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1407 [inline]
RIP: 0010:unmap_page_range+0x163d/0x2640 mm/memory.c:1428
Code: ff 48 c1 e3 0c 48 b8 00 00 00 00 00 ea ff ff 48 c1 eb 18 48 c1 e3 06 48 01 c3 48 8d 7b 28 48 89 f8 48 c1 e8 03 42 80 3c 30 00 <0f> 85 ec 0d 00 00 48 8b 43 28 48 bb 00 f0 ff ff ff ff 0f 00 48 89
RSP: 0018:ffffc9000943f798 EFLAGS: 00000246
RAX: 1ffffd40000ea505 RBX: ffffea0000752800 RCX: ffffffff81a14140
RDX: ffff8880110fcec0 RSI: ffffffff81a14fd4 RDI: ffffea0000752828
RBP: 000000001d4a0067 R08: 0000000000000001 R09: ffffc9000943f890
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000001d4a0
R13: 0000000000000c50 R14: dffffc0000000000 R15: 0000000000000000
 unmap_single_vma+0x198/0x300 mm/memory.c:1473
 unmap_vmas+0x168/0x2e0 mm/memory.c:1505
 exit_mmap+0x2b1/0x530 mm/mmap.c:3222
 __mmput+0x122/0x470 kernel/fork.c:1079
 mmput+0x53/0x60 kernel/fork.c:1100
 exit_mm kernel/exit.c:486 [inline]
 do_exit+0xa72/0x29b0 kernel/exit.c:796
 do_group_exit+0x125/0x310 kernel/exit.c:906
 get_signal+0x42a/0x1f10 kernel/signal.c:2758
 arch_do_signal+0x82/0x2390 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0x100/0x1a0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45deb9
Code: Unable to access opcode bytes at RIP 0x45de8f.
RSP: 002b:00007fbf18787c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000000020ffc000 RBX: 0000000000021280 RCX: 000000000045deb9
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffc000
RBP: 000000000118c020 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 000000000118bfd4
R13: 00007ffd7072d6df R14: 00007fbf187889c0 R15: 000000000118bfd4