rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=22e/1/0x4000000000000004 softirq=118461/118462 fqs=166 
	(t=10500 jiffies g=146753 q=1813)
NMI backtrace for cpu 1
CPU: 1 PID: 10302 Comm: syz-executor.1 Not tainted 5.5.0-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+0x1fb/0x318 lib/dump_stack.c:118
 nmi_cpu_backtrace+0xaa/0x190 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x16f/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 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:3030 [inline]
 rcu_sched_clock_irq+0x1521/0x1aa0 kernel/rcu/tree.c:2276
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:171 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1314
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x3f3/0x840 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x37c/0xda0 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:lock_release+0x4c4/0x710 kernel/locking/lockdep.c:4505
Code: 03 80 3c 18 00 74 0c 48 c7 c7 10 d1 2a 89 e8 63 2a 58 00 48 83 3d db 31 cf 07 00 0f 84 28 02 00 00 48 8b bd 78 ff ff ff 57 9d <0f> 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 0f 85 09 02
RSP: 0018:ffffc90000da8cb8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1255a22 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: ffff88809d020a50 RSI: ffff88809d020a78 RDI: 0000000000000286
RBP: ffffc90000da8d40 R08: dffffc0000000000 R09: fffffbfff12d279d
R10: fffffbfff12d279d R11: 0000000000000000 R12: ffff88809d020a54
R13: 1ffff11013a0414a R14: ffffffffffffffff R15: dffffc0000000000
 call_timer_fn+0xad/0x170 kernel/time/timer.c:1407
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0x776/0x970 kernel/time/timer.c:1773
 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786
 __do_softirq+0x283/0x7bd kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x227/0x230 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:preempt_schedule_irq+0xc0/0x150 kernel/sched/core.c:4339
Code: 67 f9 43 80 3c 37 00 74 0c 48 c7 c7 20 d1 2a 89 e8 95 72 9e f9 48 83 3d 1d 7a 15 01 00 0f 84 82 00 00 00 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 66 ed ff ff 43 80 3c 34 00 74 0c 48 c7 c7 18 d1
RSP: 0018:ffffc90001c474c8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: ffff88809d020a54 RBX: 0000000000000000 RCX: ffff88809d0201c0
RDX: 0000000000000000 RSI: ffffffff88200a20 RDI: ffff88809d020a04
RBP: ffffc90001c474e8 R08: ffff88809d020a18 R09: ffffed1015d67004
R10: ffffed1015d67004 R11: 0000000000000000 R12: 1ffffffff1255a23
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffffffff1255a24
 retint_kernel+0x1b/0x2b
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:lock_is_held_type+0x25c/0x2b0 kernel/locking/lockdep.c:4523
Code: 10 d1 2a 89 48 c1 e8 03 42 80 3c 30 00 74 0c 48 c7 c7 10 d1 2a 89 e8 13 24 58 00 48 83 3d 8b 2b cf 07 00 74 56 4c 89 e7 57 9d <0f> 1f 44 00 00 89 d8 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3
RSP: 0018:ffffc90001c475a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1255a22 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000286
RBP: ffffc90001c475f0 R08: ffffffff81a5825f R09: ffffed10126075cf
R10: ffffed10126075cf R11: 0000000000000000 R12: 0000000000000286
R13: ffff88809d020a54 R14: dffffc0000000000 R15: 1ffff11013a0414a
 lock_is_held include/linux/lockdep.h:361 [inline]
 ___might_sleep+0x3e/0x5e0 kernel/sched/core.c:6765
 zap_pte_range+0x1a4b/0x1c20 mm/memory.c:1150
 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+0x9b5/0xaf0 mm/memory.c:1255
 unmap_single_vma+0x1d4/0x2e0 mm/memory.c:1300
 unmap_vmas+0x15e/0x2b0 mm/memory.c:1332
 exit_mmap+0x281/0x540 mm/mmap.c:3130
 __mmput+0x120/0x3a0 kernel/fork.c:1082
 mmput+0x5d/0x70 kernel/fork.c:1103
 exit_mm+0x4f4/0x580 kernel/exit.c:485
 do_exit+0x572/0x2000 kernel/exit.c:788
 do_group_exit+0x15c/0x2b0 kernel/exit.c:899
 get_signal+0x13db/0x1d20 kernel/signal.c:2734
 do_signal+0x37/0x640 arch/x86/kernel/signal.c:813
 exit_to_usermode_loop arch/x86/entry/common.c:160 [inline]
 prepare_exit_to_usermode+0x326/0x5b0 arch/x86/entry/common.c:195
 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278
 do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b399
Code: Bad RIP value.
RSP: 002b:00007f656f219c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: 0000000000000000 RBX: 00007f656f21a6d4 RCX: 000000000045b399
RDX: 0000000000002000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000c1 R14: 00000000004c2040 R15: 000000000075bf2c