rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=274205, q=258)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295111384-4295100881), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.4  R  running task    26904 24864   9676 0x00000000
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5954 [inline]
 sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5929
 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:538 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq.cold+0xaf4/0xc0d kernel/rcu/tree.c:2271
 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:1310
 __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: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:829
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x4b/0x50 kernel/kcov.c:197
Code: 90 80 13 00 00 83 fa 02 75 20 48 8b 88 88 13 00 00 8b 80 84 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 <5d> c3 0f 1f 00 65 4c 8b 04 25 c0 1e 02 00 65 8b 05 98 28 8d 7e a9
RSP: 0000:ffffc90002387cd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: ffffc90002387e10 RCX: ffffc90012a75000
RDX: 0000000000040000 RSI: ffffffff8149f0b2 RDI: 0000000000000000
RBP: ffffc90002387cd0 R08: ffff888010a66640 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92000470f9d
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
 signal_setup_done+0x72/0x280 kernel/signal.c:2772
 handle_signal arch/x86/kernel/signal.c:768 [inline]
 do_signal+0x4f8/0x1700 arch/x86/kernel/signal.c:817
 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160
 prepare_exit_to_usermode+0x321/0x3a0 arch/x86/entry/common.c:195
 ret_from_intr+0x26/0x36
RIP: 0033:0x402b00
Code: 01 49 83 c5 09 45 39 67 1c 7f ce 48 69 db e8 04 00 00 44 89 b3 04 05 a7 00 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 90 <53> 48 8b 76 10 89 fb 64 8b 04 25 d0 ff ff ff 85 c0 74 3d 48 8d 86
RSP: 002b:00007f4a232044b8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000414d47
RDX: 00007f4a232044c0 RSI: 00007f4a232045f0 RDI: 000000000000000b
RBP: 000000000075bf20 R08: 00007f4a23204a70 R09: 000000000075bf20
R10: 0000000000000000 R11: 0000000000000000 R12: 00007f4a232056d4
R13: 00000000004cbe6b R14: 00000000004e6cf0 R15: 00000000ffffffff
rcu: rcu_preempt kthread starved for 10535 jiffies! g274205 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29168    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3385 [inline]
 __schedule+0x934/0x1f90 kernel/sched/core.c:4081
 schedule+0xdc/0x2b0 kernel/sched/core.c:4155
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
 rcu_gp_kthread+0x9b2/0x18d0 kernel/rcu/tree.c:1821
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352