rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P13819
rcu: 	(detected by 1, t=10502 jiffies, g=46521, q=2792 ncpus=2)
task:syz.6.2243      state:R  running task     stack:24608 pid:13819 tgid:13818 ppid:11955  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:strlen+0x41/0x70
Code: 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de <eb> 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 b9 8d 85 f6
RSP: 0018:ffffc90000a07fd8 EFLAGS: 00000246
RAX: 000000000000000d RBX: ffffffff8bce01ae RCX: 000000008bce0105
RDX: ffffffff8a5c7e68 RSI: ffffffff8e75e5e0 RDI: ffffffff8bce01a0
RBP: ffffc90000a080e8 R08: ffff8881b56dd7c0 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000100 R12: dffffc0000000000
R13: ffffffff8a5c7e68 R14: dffffc0000000000 R15: 000000000000000c
 perf_trace_lock+0xd5/0x410
 lock_release+0x392/0x3d0
 icmp6_send+0x1562/0x1b50
 ip6_link_failure+0x3b/0x4c0
 vti6_tnl_xmit+0x119d/0x1b20
 dev_hard_start_xmit+0x2d8/0x870
 __dev_queue_xmit+0x16d1/0x3890
 ip6_output+0x340/0x550
 ndisc_send_skb+0xd0b/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:ffffc90009cfef98 EFLAGS: 00000202
RAX: 0000000000004fb9 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000007 RSI: ffffffff8def8e53 RDI: ffffffff8c27ca00
RBP: ffffc90009cfeff0 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: ffff8881b56dd7c0
R13: dffffc0000000000 R14: ffff8881b4178000 R15: ffff88823c63b998
 __schedule+0x15e5/0x52d0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:mtree_range_walk+0x27e/0x840
Code: 00 bd 02 00 00 00 4c 29 e5 41 80 c4 fe 41 0f b6 c4 48 83 c0 02 48 89 44 24 78 4d 8d 67 10 bb 01 00 00 00 4c 89 e0 48 c1 e8 03 <48> b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 fa 16
RSP: 0018:ffffc90009cff320 EFLAGS: 00000a02
RAX: 1ffff1102e082b43 RBX: 0000000000000002 RCX: 0000000000080000
RDX: ffffc90008201000 RSI: 0000000000019ef0 RDI: 0000000000019ef1
RBP: fffffffffffffff4 R08: ffff8881b56dd7c0 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000002 R12: ffff888170415a18
R13: 000000110e22ffff R14: 0000200000136000 R15: ffff888170415a00
 mt_find+0x25f/0x630
 find_vma+0xed/0x160
 lock_mm_and_find_vma+0x66/0x340
 do_user_addr_fault+0x330/0x1340
 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:ffffc90009cff798 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888170d00000 RCX: 0000000000000428
RDX: 0000000000000001 RSI: 0000200000136000 RDI: ffff888170d05ec0
RBP: ffffc90009cff8f0 R08: ffff888170d07fff R09: 1ffff1102e1a0fff
R10: dffffc0000000000 R11: ffffed102e1a1000 R12: ffffc90009cffbb8
R13: 0000200000130140 R14: 0000000000008000 R15: 1ffff9200139ff77
 _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: 0033:0x7f76e259c799
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:00007f76e3388028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f76e2815fa0 RCX: 00007f76e259c799
RDX: 00000000fffffdef RSI: 0000200000000140 RDI: 0000000000000007
RBP: 00007f76e2632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f76e2816038 R14: 00007f76e2815fa0 R15: 00007fff63d18668
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 105638360504 wd_nsec: 105638368526
