rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=63621, q=106)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295008512-4294998009), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.3  R  running task    26024 26180  10214 0x80004000
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5935 [inline]
 sched_show_task.cold+0x2ed/0x34e kernel/sched/core.c:5910
 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:2795 [inline]
 rcu_sched_clock_irq.cold+0xafc/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
 </IRQ>
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:70 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x50 kernel/kcov.c:102
Code: ff 90 90 90 90 90 90 90 90 90 55 48 89 e5 65 48 8b 04 25 40 fe 01 00 65 8b 15 14 d9 8e 7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b <8b> 90 f8 12 00 00 83 fa 02 75 20 48 8b 88 00 13 00 00 8b 80 fc 12
RSP: 0018:ffff88804c68f408 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff88805fc5e140 RBX: 0000000000000001 RCX: ffffc9000c5c0000
RDX: 0000000000000000 RSI: ffffffff834736bc RDI: 0000000000000005
RBP: ffff88804c68f408 R08: ffff88805fc5e140 R09: ffffed1015d06b75
R10: ffffed1015d06b74 R11: ffff8880ae835ba3 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888087900000 R15: 0000000000000000
 debug_smp_processor_id+0x3c/0x214 lib/smp_processor_id.c:57
 rcu_dynticks_curr_cpu_in_eqs+0x17/0xb0 kernel/rcu/tree.c:299
 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:901
 rcu_read_unlock+0x3a/0x60 include/linux/rcupdate.h:649
 mem_cgroup_iter+0x470/0xaf0 mm/memcontrol.c:1127
 snapshot_refaults+0x203/0x300 mm/vmscan.c:3047
 do_try_to_free_pages+0xc14/0x11f0 mm/vmscan.c:3105
 try_to_free_mem_cgroup_pages+0x314/0xa80 mm/vmscan.c:3383
 try_charge+0x628/0x1470 mm/memcontrol.c:2572
 __memcg_kmem_charge_memcg+0x7c/0x130 mm/memcontrol.c:2954
 __memcg_kmem_charge+0x13a/0x3a0 mm/memcontrol.c:2994
 __alloc_pages_nodemask+0x4f5/0x900 mm/page_alloc.c:4780
 __alloc_pages include/linux/gfp.h:496 [inline]
 __alloc_pages_node include/linux/gfp.h:509 [inline]
 alloc_pages_node include/linux/gfp.h:523 [inline]
 alloc_thread_stack_node kernel/fork.c:257 [inline]
 dup_task_struct kernel/fork.c:869 [inline]
 copy_process+0x3f8/0x6860 kernel/fork.c:1851
 _do_fork+0x146/0xfa0 kernel/fork.c:2366
 __do_sys_clone kernel/fork.c:2521 [inline]
 __se_sys_clone kernel/fork.c:2502 [inline]
 __x64_sys_clone+0x18d/0x250 kernel/fork.c:2502
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a219
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:00007ff74ba7fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a219
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000000000000103
RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff74ba806d4
R13: 00000000004c0906 R14: 00000000004d3208 R15: 00000000ffffffff
rcu: rcu_preempt kthread starved for 10562 jiffies! g63621 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29040    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x94f/0x1e70 kernel/sched/core.c:4069
 schedule+0xd9/0x260 kernel/sched/core.c:4136
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1639 [inline]
 rcu_gp_kthread+0x9b2/0x18d0 kernel/rcu/tree.c:1799
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352