IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device batadv0
INFO: rcu_preempt self-detected stall on CPU
	1-...: (10500 ticks this GP) idle=20e/140000000000002/0 softirq=36500/36500 fqs=0 
	 (t=10500 jiffies g=2028 c=2027 q=532)
rcu_preempt kthread starved for 10500 jiffies! g2028 c2027 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_preempt     R  running task    29824     8      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746
 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
NMI backtrace for cpu 1
CPU: 1 PID: 7468 Comm: syz-executor.3 Not tainted 4.14.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x142/0x197 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x141/0x189 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:158 [inline]
 rcu_dump_cpu_stacks+0x186/0x1d2 kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x43d/0xd0a kernel/rcu/tree.c:2792
 update_process_times+0x31/0x70 kernel/time/timer.c:1590
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
 __run_hrtimer kernel/time/hrtimer.c:1220 [inline]
 __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1284
 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:ebt_do_table+0x164c/0x1ac0 net/bridge/netfilter/ebtables.c:300
RSP: 0000:ffff8880aed07268 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffff888075b40500 RBX: 00000000ffffffff RCX: 000000006d05f563
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffffc900061d6088
RBP: ffff8880aed073b0 R08: 00000000000034a8 R09: ffffffff89579f80
R10: ffff888075b40e70 R11: ffff888075b40500 R12: dffffc0000000000
R13: ffffc900061d6090 R14: ffffc900061d4000 R15: ffff8880aed07480
 ebt_nat_in+0x65/0x80 net/bridge/netfilter/ebtable_nat.c:63
 nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline]
 nf_hook_slow+0xaf/0x1b0 net/netfilter/core.c:467
 nf_hook include/linux/netfilter.h:205 [inline]
 NF_HOOK include/linux/netfilter.h:248 [inline]
 br_forward_finish+0x1b7/0x320 net/bridge/br_forward.c:67
 NF_HOOK include/linux/netfilter.h:250 [inline]
 NF_HOOK include/linux/netfilter.h:244 [inline]
 __br_forward+0x560/0x9c0 net/bridge/br_forward.c:111
 br_flood+0x466/0x530 net/bridge/br_forward.c:224
 br_dev_xmit+0x9a4/0xd40 net/bridge/br_device.c:83
 __netdev_start_xmit include/linux/netdevice.h:4038 [inline]
 netdev_start_xmit include/linux/netdevice.h:4047 [inline]
 xmit_one net/core/dev.c:3009 [inline]
 dev_hard_start_xmit+0x18c/0x8b0 net/core/dev.c:3025
 __dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3558
 neigh_hh_output include/net/neighbour.h:490 [inline]
 neigh_output include/net/neighbour.h:498 [inline]
 ip6_finish_output2+0x10bd/0x21b0 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x4f4/0xb50 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip6_output+0x20f/0x6d0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:462 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483
 ndisc_send_rs+0x12b/0x670 net/ipv6/ndisc.c:677
 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757
 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x160/0x1b0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0033:0x45a919
RSP: 002b:00007f6ff8d3ec78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: fffffffffffffff7 RBX: 0000000000000005 RCX: 000000000045a919
RDX: 0000000000000008 RSI: 0000000000000000 RDI: ffffffffffffffff
RBP: 000000000075bf20 R08: 000000000000000c R09: 0000000000000000
R10: 0000000020000300 R11: 0000000000000246 R12: 00007f6ff8d3f6d4
R13: 00000000004ca3d2 R14: 00000000004e29f8 R15: 00000000ffffffff
INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 0, t=10554 jiffies, g=1101, c=1100, q=5)
All QSes seen, last rcu_sched kthread activity 10554 (4295060164-4295049610), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.5  R  running task    29120  7466   7349 0x00000008
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143
 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline]
 check_cpu_stall kernel/rcu/tree.c:1616 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0xcb1/0xd0a kernel/rcu/tree.c:2792
 update_process_times+0x31/0x70 kernel/time/timer.c:1590
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
 __run_hrtimer kernel/time/hrtimer.c:1220 [inline]
 __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1284
 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:get_frame_pointer arch/x86/include/asm/stacktrace.h:63 [inline]
RIP: 0010:__unwind_start+0x2ea/0x3d0 arch/x86/kernel/unwind_frame.c:403
RSP: 0018:ffff8880aec07868 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8880aec07938 RCX: 0000000000000000
RDX: 0000000000000005 RSI: 0000000000000000 RDI: ffff8880aec078ed
RBP: ffff8880aec078a8 R08: ffff8880aec078e0 R09: ffff8880aec078b8
R10: ffffed1015d80f22 R11: ffff8880aec07917 R12: 0000000000000000
R13: ffff888075e80040 R14: ffff888075e80000 R15: ffff8880aec078b8
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 __save_stack_trace+0x4a/0xd0 arch/x86/kernel/stacktrace.c:43
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node_track_caller+0x51/0x80 mm/slab.c:3696
 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137
 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:980 [inline]
 nlmsg_new include/net/netlink.h:511 [inline]
 __neigh_notify+0x8b/0x150 net/core/neighbour.c:2926
 neigh_update_notify net/core/neighbour.c:2304 [inline]
 neigh_timer_handler+0x297/0xa70 net/core/neighbour.c:1001
 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x160/0x1b0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:__free_pages_ok+0x64a/0xea0 mm/page_alloc.c:1263
RSP: 0018:ffff88809276fae0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fe2d29 RBX: 0000000000000001 RCX: 1ffff1100ebd011c
RDX: dffffc0000000000 RSI: ffff888075e808c0 RDI: 0000000000000282
RBP: ffff88809276fb28 R08: ffff888075e80040 R09: ffff888075e808e0
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea00026f1800
R13: 0000000000000282 R14: 0000000000000003 R15: 000000000009bc60
 __free_pages mm/page_alloc.c:4245 [inline]
 __free_pages+0x61/0x90 mm/page_alloc.c:4239
 free_thread_stack kernel/fork.c:262 [inline]
 release_task_stack kernel/fork.c:347 [inline]
 put_task_stack+0xa5/0x1e0 kernel/fork.c:358
 finish_task_switch+0x489/0x650 kernel/sched/core.c:2692
 context_switch kernel/sched/core.c:2811 [inline]
 __schedule+0x7c0/0x1cd0 kernel/sched/core.c:3384
 preempt_schedule_common+0x4f/0xe0 kernel/sched/core.c:3508
 preempt_schedule+0x4b/0x60 kernel/sched/core.c:3534
 ___preempt_schedule+0x16/0x18
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:184
 spin_unlock include/linux/spinlock.h:357 [inline]
 fasync_insert_entry+0x235/0x2b0 fs/fcntl.c:930
 fasync_add_entry fs/fcntl.c:953 [inline]
 fasync_helper+0x5b/0xa9 fs/fcntl.c:971
 perf_fasync+0x87/0xc0 kernel/events/core.c:5518
 setfl fs/fcntl.c:73 [inline]
 do_fcntl+0x91f/0xe10 fs/fcntl.c:347
 SYSC_fcntl fs/fcntl.c:463 [inline]
 SyS_fcntl+0xd5/0x110 fs/fcntl.c:448
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a919
RSP: 002b:00007f77763e6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919
RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f77763e76d4
R13: 00000000004c13f1 R14: 00000000004d5498 R15: 00000000ffffffff