rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8674
rcu: 	(detected by 0, t=10502 jiffies, g=19605, q=1491 ncpus=2)
task:syz.0.817       state:R  running task     stack:25216 pid:8674  tgid:8673  ppid:5843   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:ref_tracker_alloc+0x133/0x460
Code: 78 36 be 8d 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 be ce 23 fd 49 8b 7d 00 ba 20 00 00 00 44 89 e6 e8 5d f4 18 fd <49> 89 c4 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 85 cf
RSP: 0018:ffffc90000007520 EFLAGS: 00000286
RAX: ffff888022ce8980 RBX: dffffc0000000000 RCX: 9858ec7466942c00
RDX: 0000000000000002 RSI: ffffffff8d9bab7c RDI: 00000000ffffffff
RBP: ffffc90000007648 R08: ffffffff8fa3b337 R09: 1ffffffff1f47666
R10: dffffc0000000000 R11: fffffbfff1f47667 R12: 0000000000002920
R13: ffffffff8dbe3678 R14: 0000000000000820 R15: ffff88802626dc68
 dst_init+0xd9/0x450
 dst_alloc+0x12a/0x170
 ip_route_output_key_hash_rcu+0x1560/0x23e0
 ip_route_output_key_hash+0x1b9/0x2e0
 ip_route_output_flow+0x2a/0x150
 __ip_queue_xmit+0xa08/0x1b00
 __tcp_transmit_skb+0x2215/0x3680
 tcp_write_wakeup+0x486/0x730
 tcp_send_probe0+0x51/0x580
 tcp_write_timer+0x162/0x2e0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 do_softirq+0xec/0x180
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x17d/0x1c0
 bpf_test_run+0x376/0x7b0
 bpf_prog_test_run_skb+0xb4e/0x1550
 bpf_prog_test_run+0x2c7/0x340
 __sys_bpf+0x55a/0x850
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd4eb8ec29
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:00007fcd4fae1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fcd4edd5fa0 RCX: 00007fcd4eb8ec29
RDX: 0000000000000050 RSI: 0000200000001300 RDI: 000000000000000a
RBP: 00007fcd4ec11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd4edd6038 R14: 00007fcd4edd5fa0 R15: 00007ffd2bc7be08
 </TASK>
sched: DL replenish lagged too much
