rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=181697, q=4)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295122808-4295112306), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.4  R  running task    27432 18038   9760 0x80000004
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5952 [inline]
 sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5927
 print_other_cpu_stall kernel/rcu/tree_stall.h:430 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:558 [inline]
 rcu_pending kernel/rcu/tree.c:3030 [inline]
 rcu_sched_clock_irq.cold+0xb23/0xc3d kernel/rcu/tree.c:2276
 update_process_times+0x2d/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:171
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1314
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1144
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x90/0xe0 kernel/locking/spinlock.c:191
Code: 48 c7 c0 38 c6 b3 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 0f 7e c3 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 b1 ae 60 f9 65 8b 05 42 d6 11 78
RSP: 0000:ffffc9001666fce0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13678c7 RBX: 0000000000000286 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000286
RBP: ffffc9001666fcf0 R08: ffff88804c8a04c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804e2e8000
R13: ffff88804c8a0be8 R14: 000000000000000a R15: 000000000000000b
 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline]
 force_sig_info_to_task+0x2a2/0x340 kernel/signal.c:1329
 force_sig_fault_to_task kernel/signal.c:1671 [inline]
 force_sig_fault+0xbe/0x100 kernel/signal.c:1678
 __bad_area_nosemaphore+0x32e/0x420 arch/x86/mm/fault.c:927
 __bad_area arch/x86/mm/fault.c:956 [inline]
 bad_area+0x69/0x80 arch/x86/mm/fault.c:962
 do_user_addr_fault arch/x86/mm/fault.c:1427 [inline]
 do_page_fault+0xc17/0x12e1 arch/x86/mm/fault.c:1539
 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203
RIP: 0033:0x405899
Code: d0 ff ff ff 01 48 8b 7c 24 28 c7 44 24 34 00 00 00 00 e8 3a dd 01 00 85 c0 75 23 48 6b 44 24 20 18 8b 7c 24 1c 48 03 44 24 38 <48> 8b 48 10 48 8b 50 08 48 8b 30 e8 d7 f8 00 00 89 44 24 34 64 f0
RSP: 002b:00007feb6171fa70 EFLAGS: 00010202
RAX: 0000000025e8e5c8 RBX: 00007feb617206d4 RCX: 00000000004151b7
RDX: e055ae0d4758eafd RSI: 0000000000000000 RDI: 0000000000000008
RBP: 000000000075bf20 R08: 00007feb6171fa70 R09: 000000000075bf20
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000bb1 R14: 00000000004cc8ef R15: 000000000075bf2c
rcu: rcu_preempt kthread starved for 10502 jiffies! g181697 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29240    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3380 [inline]
 __schedule+0x934/0x1f90 kernel/sched/core.c:4080
 schedule+0xdc/0x2b0 kernel/sched/core.c:4154
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1658 [inline]
 rcu_gp_kthread+0xa10/0x1940 kernel/rcu/tree.c:1818
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352