rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=0fa/1/0x4000000000000000 softirq=19295/19296 fqs=5239 
	(t=10502 jiffies g=27465 q=650)
NMI backtrace for cpu 0
CPU: 0 PID: 12431 Comm: syz-executor.5 Not tainted 5.11.0-rc2-next-20210111-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:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:165 [inline]
 rcu_dump_cpu_stacks+0x222/0x2a7 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:697 [inline]
 rcu_pending kernel/rcu/tree.c:3779 [inline]
 rcu_sched_clock_irq.cold+0x4f7/0x11dd kernel/rcu/tree.c:2599
 update_process_times+0x16d/0x200 kernel/time/timer.c:1796
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:preempt_count_sub+0x5f/0x150 kernel/sched/core.c:4757
Code: bf 0d 85 c9 75 1b 65 8b 05 ee 5b b4 7e 89 c2 81 e2 ff ff ff 7f 39 da 7c 13 81 fb fe 00 00 00 76 63 f7 db 65 01 1d d1 5b b4 7e <5b> c3 e8 9a 75 ad 07 85 c0 74 f5 48 c7 c0 98 26 04 8d 48 ba 00 00
RSP: 0018:ffffc900000068a8 EFLAGS: 00000213
RAX: 0000000000000902 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: 0000000000000902 RSI: ffffc90014e6e660 RDI: 0000000000000001
RBP: 0000000000000002 R08: ffffffff8e0e7242 R09: 0000000000000001
R10: 0000000000082083 R11: 0000000000000001 R12: ffffc90014e6e670
R13: ffffc900000069c5 R14: ffffc900000069e0 R15: ffffc90000006990
 unwind_next_frame+0xe3b/0x1f90 arch/x86/kernel/unwind_orc.c:608
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357
 ____kasan_slab_free.part.0+0xe1/0x110 mm/kasan/common.c:365
 kasan_slab_free include/linux/kasan.h:188 [inline]
 slab_free_hook mm/slub.c:1548 [inline]
 slab_free_freelist_hook+0x82/0x1d0 mm/slub.c:1586
 slab_free mm/slub.c:3157 [inline]
 kmem_cache_free+0x8b/0x740 mm/slub.c:3173
 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:628
 __kfree_skb net/core/skbuff.c:685 [inline]
 kfree_skb net/core/skbuff.c:702 [inline]
 kfree_skb+0x140/0x3f0 net/core/skbuff.c:696
 enqueue_to_backlog+0x1ed/0xf80 net/core/dev.c:4575
 netif_rx_internal+0x120/0x640 net/core/dev.c:4802
 netif_rx+0x7f/0x510 net/core/dev.c:4829
 loopback_xmit+0x222/0x630 drivers/net/loopback.c:88
 __netdev_start_xmit include/linux/netdevice.h:4758 [inline]
 netdev_start_xmit include/linux/netdevice.h:4772 [inline]
 xmit_one net/core/dev.c:3574 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3590
 __dev_queue_xmit+0x21db/0x2dd0 net/core/dev.c:4151
 neigh_hh_output include/net/neighbour.h:499 [inline]
 neigh_output include/net/neighbour.h:508 [inline]
 ip_finish_output2+0xeb6/0x21b0 net/ipv4/ip_output.c:230
 ip_do_fragment+0x6f2/0x1450 net/ipv4/ip_output.c:913
 ip_fragment.constprop.0+0x174/0x240 net/ipv4/ip_output.c:581
 __ip_finish_output net/ipv4/ip_output.c:306 [inline]
 __ip_finish_output+0x2de/0x640 net/ipv4/ip_output.c:290
 ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x196/0x310 net/ipv4/ip_output.c:432
 dst_output include/net/dst.h:441 [inline]
 ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:126
 iptunnel_xmit+0x5a3/0x9c0 net/ipv4/ip_tunnel_core.c:82
 geneve_xmit_skb drivers/net/geneve.c:959 [inline]
 geneve_xmit+0xde1/0x2f60 drivers/net/geneve.c:1059
 __netdev_start_xmit include/linux/netdevice.h:4758 [inline]
 netdev_start_xmit include/linux/netdevice.h:4772 [inline]
 xmit_one net/core/dev.c:3574 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3590
 __dev_queue_xmit+0x21db/0x2dd0 net/core/dev.c:4151
 neigh_hh_output include/net/neighbour.h:499 [inline]
 neigh_output include/net/neighbour.h:508 [inline]
 ip6_finish_output2+0x8db/0x16c0 net/ipv6/ip6_output.c:117
 __ip6_finish_output net/ipv6/ip6_output.c:182 [inline]
 __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161
 ip6_finish_output+0x35/0x200 net/ipv6/ip6_output.c:192
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:215
 dst_output include/net/dst.h:441 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ndisc_send_skb+0xa90/0x1750 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x12e/0x700 net/ipv6/ndisc.c:702
 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3874
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431
 expire_timers kernel/time/timer.c:1476 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1745
 __run_timers kernel/time/timer.c:1726 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758
 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:lock_is_held_type+0x14/0x100 kernel/locking/lockdep.c:5469
Code: 89 85 44 09 00 00 5b 5d c3 c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 89 f6 41 55 41 54 55 48 89 fd 53 48 83 ec 08 <e8> 17 db 5c f8 84 c0 0f 84 b8 00 00 00 9c 8f 04 24 fa 48 c7 c7 20
RSP: 0018:ffffc90014e6e760 EFLAGS: 00000286
RAX: 0000000000008a23 RBX: 0000000000000002 RCX: ffffc9000df67000
RDX: 0000000000040000 RSI: 00000000ffffffff RDI: ffffffff8ca5fba8
RBP: ffffffff8ca5fba8 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8789d2e9 R11: 0000000000000000 R12: ffff888020a0f8a8
R13: ffff888020a0f828 R14: 00000000ffffffff R15: ffff88806b208720
 lock_is_held include/linux/lockdep.h:271 [inline]
 lockdep_rtnl_is_held+0x17/0x30 net/core/rtnetlink.c:137
 inflate net/ipv4/fib_trie.c:608 [inline]
 resize+0xd20/0x2140 net/ipv4/fib_trie.c:868
 trie_rebalance net/ipv4/fib_trie.c:1059 [inline]
 fib_remove_alias net/ipv4/fib_trie.c:1617 [inline]
 fib_remove_alias+0x301/0x4a0 net/ipv4/fib_trie.c:1599
 fib_table_delete+0x719/0xa20 net/ipv4/fib_trie.c:1720
 fib_magic+0x355/0x520 net/ipv4/fib_frontend.c:1087
 fib_del_ifaddr+0xce2/0x13a0 net/ipv4/fib_frontend.c:1297
 fib_inetaddr_event+0xb4/0x2a0 net/ipv4/fib_frontend.c:1428
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 blocking_notifier_call_chain kernel/notifier.c:337 [inline]
 blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:325
 __inet_del_ifa+0x460/0xf60 net/ipv4/devinet.c:428
 inet_del_ifa net/ipv4/devinet.c:465 [inline]
 inetdev_destroy net/ipv4/devinet.c:318 [inline]
 inetdev_event+0x689/0x15c0 net/ipv4/devinet.c:1598
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2040
 call_netdevice_notifiers_mtu net/core/dev.c:2089 [inline]
 dev_set_mtu_ext+0x38b/0x590 net/core/dev.c:8607
 do_setlink+0x50e/0x3a70 net/core/rtnetlink.c:2671
 rtnl_group_changelink net/core/rtnetlink.c:3227 [inline]
 __rtnl_newlink+0xde5/0x16e0 net/core/rtnetlink.c:3381
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3491
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5553
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2345
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2432
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe669c93c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffc5966599f R14: 00007fe669c949c0 R15: 000000000119bf8c