rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=6821, q=253)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953943-4294943440), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.0  R  running task    27984  8492   8472 0x80004008
Call Trace:
 <IRQ>
 sched_show_task+0x40f/0x560 kernel/sched/core.c:5954
 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+0x1861/0x1ad0 kernel/rcu/tree.c:2271
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x38c/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
 </IRQ>
RIP: 0010:free_thread_stack+0x151/0x590 kernel/fork.c:280
Code: 31 f6 e8 02 8d 6f 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 73 94 6a 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 55 94 6a 00 48 8b 3b be fc ff ff ff e8 28 04 00
RSP: 0018:ffffc90002177a78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff11015143b31 RBX: ffff8880a8a1d988 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0002591080
RBP: ffffc90002177ab0 R08: dffffc0000000000 R09: fffffbfff12c962d
R10: fffffbfff12c962d R11: 0000000000000000 R12: ffff8880970bc820
R13: dffffc0000000000 R14: 1ffff11012e17904 R15: ffff888098263478
 release_task_stack kernel/fork.c:440 [inline]
 put_task_stack+0xa3/0x130 kernel/fork.c:451
 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081
 preempt_schedule_irq+0xc1/0x140 kernel/sched/core.c:4338
 retint_kernel+0x1b/0x2b
RIP: 0010:fs_reclaim_acquire+0x0/0xd0 mm/page_alloc.c:4093
Code: c4 08 5d c3 66 0f 1f 44 00 00 55 48 89 e5 48 c7 c7 90 e9 2f 89 48 c7 c6 84 6a aa 81 e8 99 60 b1 ff 5d c3 0f 1f 80 00 00 00 00 <55> 48 89 e5 41 56 53 41 89 fe 65 48 8b 1c 25 c0 1d 02 00 48 83 c3
RSP: 0018:ffffc90002177cc8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff02
RAX: 1ffff110129e5d61 RBX: 0000000000000dc0 RCX: ffff888094f2e580
RDX: ffff888094f2e580 RSI: 0000000000000dc0 RDI: 0000000000000dc0
RBP: ffffc90002177d08 R08: ffffffff8177ec57 R09: ffffed10150ad2c1
R10: ffffed10150ad2c1 R11: 0000000000000000 R12: ffff8880a992de00
R13: ffff888094f2e580 R14: ffffffff8177ecad R15: 0000000000000dc0
 kmem_cache_zalloc include/linux/slab.h:660 [inline]
 taskstats_tgid_alloc kernel/taskstats.c:565 [inline]
 taskstats_exit+0xdd/0xbc0 kernel/taskstats.c:604
 do_exit+0x56d/0x2000 kernel/exit.c:786
 do_group_exit+0x15c/0x2b0 kernel/exit.c:899
 __do_sys_exit_group+0x17/0x20 kernel/exit.c:910
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:908
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:908
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45af49
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffce8aab5f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045af49
RDX: 0000000000414ae1 RSI: fffffffffffffff7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffce8aab650
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffce8aab650 R14: 0000000000000000 R15: 00007ffce8aab660
rcu: rcu_preempt kthread starved for 10542 jiffies! g6821 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    28984    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3385 [inline]
 __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081
 schedule+0x181/0x210 kernel/sched/core.c:4155
 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
 rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352