rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6340
rcu: 	(detected by 1, t=10502 jiffies, g=189077, q=21236 ncpus=2)
task:syz.4.22640     state:R  running task     stack:23312 pid:6340  tgid:6338  ppid:5911   task_flags:0x400140 flags:0x00080003
Call Trace:
 <IRQ>
 sched_show_task+0x49d/0x630 kernel/sched/core.c:7901
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
 print_other_cpu_stall+0xf78/0x1340 kernel/rcu/tree_stall.h:681
 check_cpu_stall kernel/rcu/tree_stall.h:857 [inline]
 rcu_pending kernel/rcu/tree.c:3671 [inline]
 rcu_sched_clock_irq+0xa47/0x11b0 kernel/rcu/tree.c:2706
 update_process_times+0x235/0x2d0 kernel/time/timer.c:2473
 tick_sched_handle kernel/time/tick-sched.c:276 [inline]
 tick_nohz_handler+0x39a/0x520 kernel/time/tick-sched.c:297
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x506/0xd40 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x45d/0xa90 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:find_entry_to_transmit+0x4d1/0x8d0 net/sched/sch_taprio.c:364
Code: 24 a0 00 00 00 31 ff 4c 89 e6 e8 5a 04 e1 f8 45 85 e4 74 4c 42 0f b6 44 3d 00 84 c0 0f 85 fa 02 00 00 48 8b 44 24 18 44 8b 38 <4c> 8b a4 24 90 00 00 00 4c 89 e7 4c 89 fe e8 6c 01 e1 f8 4d 39 fc
RSP: 0018:ffffc90005886898 EFLAGS: 00000246
RAX: ffff88805cd66d68 RBX: 1bc1ce6576d91229 RCX: ffff888026e23c00
RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff1100b9acdad R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1006ea7685 R12: 0000000000000001
R13: 1bc1ce6576d89228 R14: ffff88805cd66d40 R15: 0000000004000000
 get_packet_txtime net/sched/sch_taprio.c:502 [inline]
 taprio_enqueue_one+0xb66/0x1650 net/sched/sch_taprio.c:571
 dev_qdisc_enqueue+0x4e/0x260 net/core/dev.c:4118
 __dev_xmit_skb net/core/dev.c:4214 [inline]
 __dev_queue_xmit+0xe72/0x3b70 net/core/dev.c:4729
 dev_queue_xmit include/linux/netdevice.h:3365 [inline]
 br_dev_queue_push_xmit+0x6c5/0x890 net/bridge/br_forward.c:53
 NF_HOOK+0x320/0x3c0 include/linux/netfilter.h:318
 br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
 NF_HOOK+0x320/0x3c0 include/linux/netfilter.h:318
 __br_forward+0x41e/0x600 net/bridge/br_forward.c:115
 deliver_clone net/bridge/br_forward.c:131 [inline]
 maybe_deliver+0xb5/0x160 net/bridge/br_forward.c:191
 br_flood+0x31a/0x6a0 net/bridge/br_forward.c:238
 br_dev_xmit+0xc72/0x1840 net/bridge/br_device.c:-1
 __netdev_start_xmit include/linux/netdevice.h:5248 [inline]
 netdev_start_xmit include/linux/netdevice.h:5257 [inline]
 xmit_one net/core/dev.c:3845 [inline]
 dev_hard_start_xmit+0x2f0/0x870 net/core/dev.c:3861
 __dev_queue_xmit+0x1b50/0x3b70 net/core/dev.c:4763
 packet_snd net/packet/af_packet.c:3076 [inline]
 packet_sendmsg+0x3e33/0x5080 net/packet/af_packet.c:3108
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 __sys_sendto+0x3c7/0x520 net/socket.c:2244
 __do_sys_sendto net/socket.c:2251 [inline]
 __se_sys_sendto net/socket.c:2247 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2247
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ca249f749
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:00007f1ca0706038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1ca26f5fa0 RCX: 00007f1ca249f749
RDX: 000000000000ffa9 RSI: 0000200000000140 RDI: 0000000000000003
RBP: 00007f1ca2523f91 R08: 0000200000000080 R09: 0000000000000014
R10: 000000000400c010 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1ca26f6038 R14: 00007f1ca26f5fa0 R15: 00007ffefc0b62d8
 </TASK>