rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5811
rcu: 	(detected by 0, t=10502 jiffies, g=9689, q=8096 ncpus=2)
task:syz.1.20        state:R  running task     stack:26880 pid:5811  tgid:5809  ppid:5622   task_flags:0x400140 flags:0x00080012
Call Trace:
 <IRQ>
 sched_show_task+0x4aa/0x5f0
 print_other_cpu_stall+0xfcc/0x1380
 rcu_sched_clock_irq+0x939/0x1050
 update_process_times+0x23b/0x2f0
 tick_nohz_handler+0x42b/0x770
 __hrtimer_run_queues+0x375/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0xd8a/0x2550
Code: 48 b8 00 00 00 00 00 fc ff df 80 7c 05 00 00 74 08 4c 89 ff e8 77 ef b9 00 4c 89 7c 24 68 48 89 9c 24 80 00 00 00 4d 8b 7e 08 <49> 8d 5e 10 49 89 dd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df 41
RSP: 0000:ffffc90000007198 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffffff90c97227 RCX: ffffffff904c28e0
RDX: ffffffff90c97222 RSI: 0000000000000002 RDI: ffffffff8c28aa00
RBP: 1ffff92000000e4e R08: 000000000000000c R09: ffffffff8e95cd60
R10: ffffc900000072b8 R11: ffffffff81b0d880 R12: ffffc900000073b0
R13: 1ffff92000000e4d R14: ffffc90000007268 R15: ffffc90000000000
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x31c/0x660
 ref_tracker_alloc+0x15a/0x4c0
 ___neigh_create+0xc9a/0x2250
 ip6_finish_output2+0x729/0x13e0
 ip6_output+0x340/0x550
 ndisc_send_skb+0xd0b/0x1670
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 f3 db ea f5 e8 fe e5 24 f6 fb bf 01 00 00 00 <e8> 13 a3 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 c4 e7 24 f6 bf 01
RSP: 0000:ffffc90005f7fab0 EFLAGS: 00000202
RAX: 0000000000007f0b RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000007 RSI: ffffffff8dfa3a1a RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x14f/0x730
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:mem_cgroup_from_task+0x32/0x120
Code: 53 48 85 ff 0f 84 e7 00 00 00 49 89 fe 49 bf 00 00 00 00 00 fc ff df 48 8d 9f f8 13 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 64 41 f8 ff 48 8b 1b e8 4c 1d 6f 09 85 c0 74 56
RSP: 0000:ffffc90005f7fbd8 EFLAGS: 00000246
RAX: 1ffff11020577d8f RBX: ffff888102bbec78 RCX: 0000000000080000
RDX: ffffc900095a3000 RSI: 0000000000008ec1 RDI: ffff888102bbd880
RBP: 0000000000000017 R08: ffffffff82176c31 R09: ffffffff8e95cd60
R10: dffffc0000000000 R11: fffffbfff20612df R12: dffffc0000000000
R13: ffff8881033e0000 R14: ffff888102bbd880 R15: dffffc0000000000
 count_memcg_event_mm+0x12c/0x260
 handle_mm_fault+0x264a/0x3170
 do_user_addr_fault+0xa73/0x1340
 exc_page_fault+0x6a/0xc0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f63c4462efe
Code: 00 00 00 64 f0 83 04 25 a0 ff ff ff 01 64 48 8b 04 25 00 00 00 00 48 8d b8 d8 fe ff ff e8 4a af 0d 00 85 c0 0f 84 a2 01 00 00 <64> f0 83 2c 25 a0 ff ff ff 01 e8 f3 90 0c 00 48 8b 4c 24 08 8b 00
RSP: 002b:00007f63c5501050 EFLAGS: 00010206
RAX: 000000000000000c RBX: 00007f63c4816090 RCX: 00007f63c4632d69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f63c4632d69 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f63c4816128 R14: 00007f63c4816090 R15: 00007ffc51176108
 </TASK>
sched: DL replenish lagged too much
