rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10520
rcu: 	(detected by 1, t=10502 jiffies, g=27209, q=2003 ncpus=2)
task:syz.3.1339      state:R  running task     stack:23416 pid:10520 tgid:10519 ppid:7271   task_flags:0x400140 flags:0x0000400e
Call Trace:
 <IRQ>
 sched_show_task+0x49d/0x630
 print_other_cpu_stall+0xf7a/0x1340
 rcu_sched_clock_irq+0xa47/0x11b0
 update_process_times+0x23c/0x2f0
 tick_nohz_handler+0x39a/0x520
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kfence_guarded_alloc+0x785/0xc70
Code: 81 ff 00 10 00 00 73 4d 49 83 e6 f8 41 bf 08 00 00 00 49 29 df 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 f7 e8 b1 ca ff ff 4d 89 26 4b 8d 04 37 48 3d 00 10 00
RSP: 0018:ffffc900001e0580 EFLAGS: 00000246
RAX: 1ffff11026cb8c1f RBX: ffff8881365c6000 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: 00000000000000f0 RDI: 0000000000001000
RBP: ffffc900001e0690 R08: ffffffff99b2213f R09: 1ffffffff3364427
R10: dffffc0000000000 R11: fffffbfff3364428 R12: adacafaea9a8abaa
R13: ffff88801caf5a00 R14: ffff8881365c60f8 R15: 0000777ec9a3a008
 __kfence_alloc+0x385/0x3b0
 kmem_cache_alloc_node_noprof+0x315/0x3c0
 __alloc_skb+0x112/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x369/0x670
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 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+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 cf b7 ea 09 e8 5a 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900030ff018 EFLAGS: 00000286
RAX: 57741fe6f3dfc200 RBX: 0000000000000000 RCX: 57741fe6f3dfc200
RDX: 0000000000000007 RSI: ffffffff8d9b6dcb RDI: ffffffff8be33300
RBP: ffffc900030ff070 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: ffff888107ea9cc0
R13: dffffc0000000000 R14: ffff888022075640 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock+0x3f/0x50
 unmap_page_range+0x3a79/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x248/0xb50
 __mmput+0x118/0x420
 copy_process+0x2910/0x3c00
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe53dd8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe53ec9ffe8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fe53dfb5fa0 RCX: 00007fe53dd8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000a49a4080
RBP: 00007fe53de11e19 R08: ffffffffff600000 R09: ffffffffff600000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007fe53dfb6038 R14: 00007fe53dfb5fa0 R15: 00007fff21317de8
 </TASK>
