rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=d02/1/0x4000000000000004 softirq=178353/178353 fqs=5208 
	(t=10501 jiffies g=292833 q=310)
NMI backtrace for cpu 1
CPU: 1 PID: 26957 Comm: syz-executor.5 Not tainted 5.4.0-rc2+ #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+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/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:__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 30 1d f3 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 02 ac 01 00 74 20 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 32 f7 07 fa 65 8b 05 d3 e2 ba 78 85 c0 74 06 41
RSP: 0018:ffff8880ae909dd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11e63a6 RBX: ffffffff85ce7840 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff888017a92b94
RBP: ffff8880ae909dd8 R08: 1ffffffff14ee12e R09: fffffbfff14ee12f
R10: fffffbfff14ee12e R11: ffffffff8a770977 R12: ffff8880ae924c00
R13: ffff888044aac348 R14: ffff8880ae924c00 R15: dffffc0000000000
 expire_timers kernel/time/timer.c:1448 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x6b1/0x1790 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
 </IRQ>
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:176 [inline]
RIP: 0010:check_memory_region+0x22/0x1a0 mm/kasan/generic.c:192
Code: 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 34 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 53 <0f> 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00 fc
RSP: 0018:ffff88800e2d76f0 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
RAX: ffff7fffffffffff RBX: 00007fb17c637000 RCX: ffffffff819ea8c8
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0001862a70
RBP: ffff88800e2d7708 R08: ffff888017a92300 R09: fffff9400030c549
R10: fffff9400030c548 R11: ffffea0001862a47 R12: ffffea0001862a40
R13: ffff88801eec71b0 R14: ffffea0001862a70 R15: dffffc0000000000
 __kasan_check_read+0x11/0x20 mm/kasan/common.c:92
 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
 page_mapcount include/linux/mm.h:728 [inline]
 zap_pte_range mm/memory.c:1063 [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+0x16f8/0x25f0 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:3161
 __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: Bad RIP value.
RSP: 002b:00007fb17bf8dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000000020000000 RBX: 0000000000000006 RCX: 0000000000459a59
RDX: 0000000000000000 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 00007fb17bf8e6d4
R13: 00000000004c6176 R14: 00000000004db118 R15: 00000000ffffffff