rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P2160
rcu: 	(detected by 1, t=10502 jiffies, g=152705, q=12802 ncpus=2)
task:syz.8.10081     state:R  running task     stack:23736 pid:2160  tgid:2159  ppid:32569  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:rcu_is_watching+0x70/0xb0
Code: c3 98 8f a0 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 29 06 f9 10 74 11 83 e0 04 c1 e8 02 5b <41> 5e 41 5f e9 07 d9 d3 09 cc e8 11 6d 8d ff eb e8 48 c7 c7 40 fb
RSP: 0018:ffffc900001dfb58 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 00007f9a78611e01 RCX: 1fc68bfa747f6100
RDX: ffffffff902a1000 RSI: ffffffff8be2fce0 RDI: ffffffff8be2fca0
RBP: dffffc0000000000 R08: 0000000000000022 R09: ffffffff8172c025
R10: ffffc900001dfcf8 R11: ffffffff81ac34b0 R12: 00007f9a767f6038
R13: ffffffff8172c025 R14: ffffffff8dbd8d18 R15: dffffc0000000000
 lock_release+0x4b/0x3e0
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 skb_clone+0x212/0x3a0
 maybe_deliver+0x98/0x160
 br_flood+0x31a/0x6a0
 br_handle_frame_finish+0x14b4/0x19b0
 br_nf_hook_thresh+0x3c6/0x4a0
 br_nf_pre_routing_finish_ipv6+0x948/0xd00
 br_nf_pre_routing_ipv6+0x37e/0x6b0
 br_handle_frame+0x982/0x14c0
 __netif_receive_skb_core+0x10b9/0x4020
 __netif_receive_skb+0x72/0x380
 process_backlog+0x60e/0x14f0
 __napi_poll+0xc7/0x360
 net_rx_action+0x707/0xe30
 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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 4b 7e 17 f6 e8 46 c1 4e f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000369f0e0 EFLAGS: 00000282
RAX: 1fc68bfa747f6100 RBX: 0000000000000000 RCX: 1fc68bfa747f6100
RDX: 0000000000000000 RSI: ffffffff8d9b1631 RDI: 0000000000000001
RBP: ffffc9000369f180 R08: ffffffff8fa32437 R09: 1ffffffff1f46486
R10: dffffc0000000000 R11: fffffbfff1f46487 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006d3e1c
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__local_bh_enable_ip+0x135/0x1c0
Code: 8b e8 cf 83 f2 09 65 66 8b 05 bf 79 1a 11 66 85 c0 75 5a bf 01 00 00 00 e8 d8 13 0b 00 e8 23 55 42 00 fb 65 8b 05 9b 79 1a 11 <85> c0 75 05 e8 52 e0 ae ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000369f240 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 1fc68bfa747f6100
RDX: 0000000000000000 RSI: ffffffff8d9b1631 RDI: ffffffff8be2fd00
RBP: ffffc9000369f2d0 R08: ffffffff8fa32437 R09: 1ffffffff1f46486
R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffffffff8960403b
R13: 1ffff11021bbd430 R14: dffffc0000000000 R15: 1ffff920006d3e48
 __dev_queue_xmit+0x1d79/0x3b50
 __netlink_deliver_tap+0x5ad/0x850
 netlink_deliver_tap+0x19c/0x1b0
 netlink_dump+0x92b/0xe90
 netlink_recvmsg+0x676/0xa30
 sock_recvmsg+0x22c/0x270
 ____sys_recvmsg+0x1c9/0x460
 ___sys_recvmsg+0x1b5/0x510
 __x64_sys_recvmsg+0x198/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a7858ebe9
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:00007f9a767f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f9a787b5fa0 RCX: 00007f9a7858ebe9
RDX: 0000000000000102 RSI: 0000200000001ac0 RDI: 0000000000000009
RBP: 00007f9a78611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9a787b6038 R14: 00007f9a787b5fa0 R15: 00007ffd6e878fb8
 </TASK>
