protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10499 ticks this GP) idle=f72/1/0x4000000000000002 softirq=251172/251172 fqs=40 rcu: (t=10501 jiffies g=407705 q=103) rcu: rcu_preempt kthread starved for 10422 jiffies! g407705 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt I29008 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3474 schedule+0x92/0x1c0 kernel/sched/core.c:3518 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1804 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 NMI backtrace for cpu 1 CPU: 1 PID: 21171 Comm: syz-executor.5 Not tainted 4.19.70 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x189/0x1d5 kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1636 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:hhf_dequeue+0x557/0xa00 net/sched/sch_hhf.c:435 Code: 48 39 c2 74 34 e8 89 dd dc fb 49 8d bd 6c 03 00 00 48 89 f8 48 c1 e8 03 42 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 91 03 00 00 45 8b b5 6c 03 00 00 e8 55 dd dc fb 49 8d RSP: 0018:ffff88801592ed18 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff88805dbd1938 RCX: ffffc900108c4000 RDX: 0000000000000000 RSI: ffffffff858e8907 RDI: ffff88805dbd19ec RBP: ffff88801592ed68 R08: ffff8880a7b14680 R09: 0000000000000006 R10: ffff8880a7b14ff0 R11: 000000000b9ec47c R12: dffffc0000000000 R13: ffff88805dbd1680 R14: 0000000000000001 R15: 0000000000000000 dequeue_skb net/sched/sch_generic.c:277 [inline] qdisc_restart net/sched/sch_generic.c:380 [inline] __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398 __dev_xmit_skb net/core/dev.c:3501 [inline] __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876 br_dev_queue_push_xmit+0x405/0x5d0 net/bridge/br_forward.c:56 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] br_forward_finish+0xfa/0x400 net/bridge/br_forward.c:69 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] __br_forward+0x647/0xb30 net/bridge/br_forward.c:113 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:129 maybe_deliver net/bridge/br_forward.c:184 [inline] maybe_deliver net/bridge/br_forward.c:172 [inline] br_flood+0x4da/0x710 net/bridge/br_forward.c:226 br_dev_xmit+0xeeb/0x1490 net/bridge/br_device.c:103 __netdev_start_xmit include/linux/netdevice.h:4303 [inline] netdev_start_xmit include/linux/netdevice.h:4312 [inline] xmit_one net/core/dev.c:3257 [inline] dev_hard_start_xmit+0x1a5/0x980 net/core/dev.c:3273 __dev_queue_xmit+0x2704/0x2fe0 net/core/dev.c:3843 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876 neigh_resolve_output net/core/neighbour.c:1369 [inline] neigh_resolve_output+0x5b7/0x980 net/core/neighbour.c:1349 neigh_output include/net/neighbour.h:501 [inline] ip_finish_output2+0x93d/0x1730 net/ipv4/ip_output.c:229 ip_finish_output+0x737/0xce0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x225/0x650 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:447 [inline] ip_local_out+0xbb/0x190 net/ipv4/ip_output.c:124 ip_send_skb+0x42/0xf0 net/ipv4/ip_output.c:1442 ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1462 raw_sendmsg+0x1e60/0x2b80 net/ipv4/raw.c:677 inet_sendmsg+0x141/0x5d0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 __do_sys_sendto net/socket.c:1799 [inline] __se_sys_sendto net/socket.c:1795 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459879 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fab1ff4cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459879 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 00000000200000c0 R09: 000000000000006e R10: 0000000000000000 R11: 0000000000000246 R12: 00007fab1ff4d6d4 R13: 00000000004c78ab R14: 00000000004dd1c8 R15: 00000000ffffffff