rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P18320
rcu: 	(detected by 0, t=10502 jiffies, g=63569, q=1601 ncpus=2)
task:syz.1.3593      state:R  running task     stack:23728 pid:18320 tgid:18319 ppid:5849   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:check_preemption_disabled+0x6/0x120
Code: c7 c6 e0 32 e3 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 <48> 83 ec 10 65 48 8b 05 be de 26 07 48 89 44 24 08 65 8b 05 c6 de
RSP: 0018:ffffc90000007430 EFLAGS: 00000203
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff8be332e0 RDI: ffffffff8be332a0
RBP: ffffffff8172c195 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90000007638 R11: ffffffff81ac3930 R12: 0000000000000002
R13: ffffffff8e139ea0 R14: 0000000000000000 R15: 0000000000000000
 rcu_is_watching+0x15/0xb0
 lock_acquire+0x5f/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/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 2f c7 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:ffffc90006517118 EFLAGS: 00000286
RAX: 17368b15a8ac5400 RBX: 0000000000000000 RCX: 17368b15a8ac5400
RDX: 0000000000000000 RSI: ffffffff8d9b6a7d RDI: ffffffff8be33300
RBP: ffffc90006517170 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff888108599cc0
R13: dffffc0000000000 R14: ffffffff8de95100 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x1315/0x2390
Code: 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 <4c> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8
RSP: 0018:ffffc90006517518 EFLAGS: 00000246
RAX: fffffffff946b99c RBX: ffffffff9010ee5c RCX: dffffc0000000000
RDX: ffffffff9010ee5c RSI: ffffffff90b9afc4 RDI: ffffffff8be332a0
RBP: ffffffff9010ee5c R08: 0000000000000001 R09: ffffffff8172c195
R10: ffffc90006517638 R11: ffffffff81ac3930 R12: ffffffff8957a9a4
R13: ffffffff9010ee5c R14: ffffc900065175e8 R15: ffffffff9010ee5c
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 sock_kmalloc+0xd6/0x160
 ____sys_sendmsg+0x1b5/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd58858ebe9
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:00007fd5894df038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd5887c5fa0 RCX: 00007fd58858ebe9
RDX: 0000000020000081 RSI: 0000200000000840 RDI: 000000000000000d
RBP: 00007fd588611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd5887c6038 R14: 00007fd5887c5fa0 R15: 00007ffee4d3e478
 </TASK>
sched: DL replenish lagged too much
