rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P25934
rcu: 	(detected by 1, t=10502 jiffies, g=109541, q=2943 ncpus=2)
task:syz.1.6061      state:R  running task     stack:25128 pid:25934 tgid:25933 ppid:24674  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+0x4e7/0xcc0
 hrtimer_interrupt+0x42b/0x1010
 __sysvec_apic_timer_interrupt+0x102/0x460
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:icmp6_dst_alloc+0xa6/0x440
Code: 00 00 49 89 c7 48 8d b8 90 00 00 00 ba 58 00 00 00 31 f6 e8 6c 21 da f7 49 8d 9e e8 0d 00 00 48 89 d8 48 c1 e8 03 80 3c 28 00 <74> 08 48 89 df e8 80 1e da f7 48 8b 1b 48 8d 7b 14 be 04 00 00 00
RSP: 0018:ffffc90000a08990 EFLAGS: 00000246
RAX: 1ffff110220c7685 RBX: ffff88811063b428 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888188c86ce8
RBP: dffffc0000000000 R08: ffff888188c86ce7 R09: 0000000000000000
R10: ffff888188c86c90 R11: ffffed1031190d9d R12: ffff88816aeaa000
R13: ffffc90000a08ad0 R14: ffff88811063a640 R15: ffff888188c86c00
 ndisc_send_skb+0x44a/0x1670
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x245/0x920
Code: 00 00 48 85 db 0f 85 e8 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 49 83 c4 48 4c 89 e7 e8 d5 65 1c 0a e8 30 81 38 00 fb 4c 8b 65 c0 <49> 8d bc 24 80 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900089e6f98 EFLAGS: 00000202
RAX: 00000000003755f7 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000007 RSI: ffffffff8def8ec0 RDI: ffffffff8c27c800
RBP: ffffc900089e6ff0 R08: ffffffff9011b3b7 R09: 1ffffffff2023676
R10: dffffc0000000000 R11: fffffbfff2023677 R12: ffff8881191bba80
R13: dffffc0000000000 R14: ffff88816a660000 R15: ffff88823c63b998
 __schedule+0x15e5/0x52d0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:lock_is_held_type+0x106/0x150
Code: 18 00 00 b8 ff ff ff ff 65 0f c1 05 04 b0 6d 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 cb e2 02 00 cc 90 0f 0b 90 48 c7
RSP: 0018:ffffc900089e7330 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: ffffc900232ab000 RSI: ffffffff8e169c78 RDI: ffffffff8c27c800
RBP: 00000000ffffffff R08: ffffffff821576d1 R09: ffffffff8e75e5e0
R10: dffffc0000000000 R11: ffffed10043e9515 R12: 0000000000000246
R13: ffff8881191bba80 R14: ffffffff8e75e6a0 R15: 0000000000000004
 rcu_read_lock_sched_held+0x33/0x70
 mem_cgroup_from_task+0x4d/0x120
 count_memcg_event_mm+0x12c/0x260
 handle_mm_fault+0x2c01/0x3310
 do_user_addr_fault+0x75b/0x1340
 exc_page_fault+0x6a/0xc0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x75/0x90
Code: 05 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 c1 48 89 c8 48 c1 e9 03 83 e0 07 <f3> 48 a5 89 c1 85 c9 75 91 e9 fd 47 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc900089e7798 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888115eb8000 RCX: 0000000000000028
RDX: 0000000000000001 RSI: 00002000004a8000 RDI: ffff888115ebfec0
RBP: ffffc900089e78f0 R08: ffff888115ebffff R09: 1ffff11022bd7fff
R10: dffffc0000000000 R11: ffffed1022bd8000 R12: ffffc900089e7bb8
R13: 00002000004a0140 R14: 0000000000008000 R15: 1ffff9200113cf77
 _copy_from_iter+0x21b/0x1670
 kcm_sendmsg+0xe0c/0x2b60
 sock_write_iter+0x49b/0x4f0
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31ca19c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f31cb05c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f31ca415fa0 RCX: 00007f31ca19c799
RDX: 00000000fffffdef RSI: 0000200000000140 RDI: 0000000000000006
RBP: 00007f31ca232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f31ca416038 R14: 00007f31ca415fa0 R15: 00007ffda5b961f8
 </TASK>
sched: DL replenish lagged too much
