rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=69a/1/0x4000000000000000 softirq=12110/12110 fqs=0 
	(t=10500 jiffies g=13821 q=674)
rcu: rcu_preempt kthread starved for 10500 jiffies! g13821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:29176 pid:   13 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5078
 schedule+0xcf/0x270 kernel/sched/core.c:5157
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1878
 rcu_gp_fqs_loop kernel/rcu/tree.c:1940 [inline]
 rcu_gp_kthread+0xbbe/0x1d70 kernel/rcu/tree.c:2113
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
NMI backtrace for cpu 1
CPU: 1 PID: 10080 Comm: syz-executor.0 Not tainted 5.11.0-rc7-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:164 [inline]
 rcu_dump_cpu_stacks+0x1f4/0x230 kernel/rcu/tree_stall.h:337
 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:643 [inline]
 rcu_pending kernel/rcu/tree.c:3751 [inline]
 rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580
 update_process_times+0x16d/0x200 kernel/time/timer.c:1782
 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:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
 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:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
RIP: 0010:unwind_next_frame+0x12dd/0x1f90 arch/x86/kernel/unwind_orc.c:584
Code: 95 c6 41 84 f1 0f 85 fa 08 00 00 83 e0 07 38 c1 40 0f 9e c6 84 c9 0f 95 c0 40 84 c6 0f 85 e3 08 00 00 49 0f bf 70 02 4c 89 ff <4c> 01 e6 e8 cb eb ff ff 84 c0 0f 85 1a fb ff ff e9 c6 f0 ff ff 80
RSP: 0018:ffffc90000daf8f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff920001b5f27 RCX: 0000000000000000
RDX: ffffc90000dafa10 RSI: ffffffffffffffd0 RDI: ffffc90000daf9d0
RBP: 0000000000000002 R08: ffffffff8e9788b0 R09: 0000000000000001
R10: 0000000000082083 R11: 0000000000000001 R12: ffffc90000db0aa0
R13: ffffc90000dafa05 R14: ffffc90000dafa20 R15: ffffc90000daf9d0
 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:356
 ____kasan_slab_free+0xe1/0x110 mm/kasan/common.c:362
 kasan_slab_free include/linux/kasan.h:192 [inline]
 slab_free_hook mm/slub.c:1547 [inline]
 slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1580
 slab_free mm/slub.c:3143 [inline]
 kmem_cache_free+0x82/0x350 mm/slub.c:3159
 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:636
 __kfree_skb net/core/skbuff.c:693 [inline]
 kfree_skb net/core/skbuff.c:710 [inline]
 kfree_skb+0x140/0x3f0 net/core/skbuff.c:704
 enqueue_to_backlog+0x1ed/0xf80 net/core/dev.c:4575
 netif_rx_internal+0x120/0x640 net/core/dev.c:4804
 netif_rx+0x7f/0x510 net/core/dev.c:4831
 loopback_xmit+0x222/0x630 drivers/net/loopback.c:88
 __netdev_start_xmit include/linux/netdevice.h:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [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:4778 [inline]
 netdev_start_xmit include/linux/netdevice.h:4792 [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:3875
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731
 __run_timers kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744
 __do_softirq+0x29b/0x9f6 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:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:199
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ee c6 5b f8 48 89 ef e8 96 7b 5c f8 e8 41 a0 7b f8 fb bf 01 00 00 00 <e8> d6 82 50 f8 65 8b 05 cf e8 04 77 85 c0 74 02 5d c3 e8 5b 3e 03
RSP: 0018:ffffc9000100df98 EFLAGS: 00000202
RAX: 00000000000009c7 RBX: 0000000000000001 RCX: ffffffff81585217
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff8880b9d34c40 R08: 0000000000000001 R09: ffffffff8f8667df
R10: fffffbfff1f0ccfb R11: 0000000000000000 R12: ffff8880b9d34c40
R13: ffff888030553780 R14: 0000000000000000 R15: ffff88806b6f5340
 finish_lock_switch kernel/sched/core.c:4079 [inline]
 finish_task_switch.isra.0+0x158/0x7e0 kernel/sched/core.c:4196
 context_switch kernel/sched/core.c:4330 [inline]
 __schedule+0x914/0x21a0 kernel/sched/core.c:5078
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5340
 irqentry_exit_cond_resched kernel/entry/common.c:385 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:377 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:415
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:356 [inline]
RIP: 0010:__rcu_read_lock+0x22/0xa0 kernel/rcu/tree_plugin.h:376
Code: 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 65 48 8b 1c 25 00 f0 01 00 48 8d bb cc 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4f 83
RSP: 0018:ffffc9000100e1a0 EFLAGS: 00000a07
RAX: dffffc0000000000 RBX: ffff88806b6f5340 RCX: ffffc90001be1000
RDX: 1ffff1100d6deae1 RSI: ffffffff817ec7fc RDI: ffff88806b6f570c
RBP: 0000000000465b09 R08: ffffffff8eadbdb0 R09: ffffffff8eadbdb4
R10: 0000000000082083 R11: 0000000000000001 R12: ffffc9000100e2c8
R13: 0000000000000000 R14: ffff88806b6f5340 R15: 0000000000000200
 rcu_read_lock include/linux/rcupdate.h:646 [inline]
 is_bpf_text_address+0x11/0x160 kernel/bpf/core.c:700
 kernel_text_address kernel/extable.c:151 [inline]
 kernel_text_address+0xbd/0xf0 kernel/extable.c:120
 __kernel_text_address+0x9/0x30 kernel/extable.c:105
 unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline]
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:313
 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:401 [inline]
 ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429
 kasan_slab_alloc include/linux/kasan.h:209 [inline]
 slab_post_alloc_hook mm/slab.h:512 [inline]
 slab_alloc_node mm/slub.c:2892 [inline]
 __kmalloc_node_track_caller+0x1e0/0x3f0 mm/slub.c:4510
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 pskb_expand_head+0x15a/0x1040 net/core/skbuff.c:1638
 netlink_trim+0x1ea/0x240 net/netlink/af_netlink.c:1286
 netlink_broadcast_filtered+0x65/0xdc0 net/netlink/af_netlink.c:1491
 netlink_broadcast net/netlink/af_netlink.c:1536 [inline]
 nlmsg_multicast include/net/netlink.h:1033 [inline]
 nlmsg_notify+0x90/0x250 net/netlink/af_netlink.c:2537
 rtmsg_fib+0x3b7/0xdf0 net/ipv4/fib_semantics.c:531
 fib_table_delete+0x6a3/0xa20 net/ipv4/fib_trie.c:1714
 fib_magic+0x355/0x520 net/ipv4/fib_frontend.c:1087
 fib_del_ifaddr+0x89d/0x13a0 net/ipv4/fib_frontend.c:1197
 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:8621
 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: 0033:0x465b09
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2d6347b188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007f2d6347b300 R15: 0000000000022000