rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=d32/1/0x4000000000000000 softirq=45136/45136 fqs=0 
	(t=10500 jiffies g=71369 q=182)
rcu: rcu_preempt kthread starved for 10500 jiffies! g71369 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:28888 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: 22470 Comm: syz-executor.3 Not tainted 5.11.0-rc5-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: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:__ipv6_addr_type+0x2/0x330 net/ipv6/addrconf_core.c:39
Code: 7c 24 08 e8 e0 0c ef f9 e9 16 ff ff ff 4c 89 ef e8 b3 0c ef f9 e9 3e ff ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc 41 55 <41> 54 55 53 48 89 fb e8 e2 4c ac f9 48 89 da 48 b8 00 00 00 00 00
RSP: 0018:ffffc90000db0108 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: ffff88805a895340 RSI: ffffffff87a95aa3 RDI: ffff88802322e800
RBP: ffff88802322e800 R08: 0000000000000040 R09: 0000000000000000
R10: ffffffff87a95a95 R11: 0000000000000000 R12: ffff88806d651800
R13: ffffc90000db0200 R14: ffff888018535940 R15: ffffc90000db01c0
 __ipv6_dev_get_saddr+0x12b/0x5c0 net/ipv6/addrconf.c:1664
 ipv6_dev_get_saddr+0x83b/0xba0 net/ipv6/addrconf.c:1815
 ip6_route_get_saddr include/net/ip6_route.h:145 [inline]
 ip6_dst_lookup_tail+0xc83/0x1740 net/ipv6/ip6_output.c:1068
 ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1193
 geneve_get_v6_dst+0x46f/0x9a0 drivers/net/geneve.c:862
 geneve6_xmit_skb drivers/net/geneve.c:981 [inline]
 geneve_xmit+0x3a4/0x2f60 drivers/net/geneve.c:1056
 __netdev_start_xmit include/linux/netdevice.h:4776 [inline]
 netdev_start_xmit include/linux/netdevice.h:4790 [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_resolve_output net/core/neighbour.c:1491 [inline]
 neigh_resolve_output+0x4d8/0x7e0 net/core/neighbour.c:1471
 neigh_output include/net/neighbour.h:510 [inline]
 ip6_finish_output2+0x6b8/0x16c0 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+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:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
RIP: 0010:do_raw_spin_lock+0x85/0x2b0 kernel/locking/spinlock_debug.c:112
Code: 00 00 00 48 89 4c 24 60 31 c9 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 db 01 00 00 8b 45 04 <3d> ad 4e ad de 0f 85 77 01 00 00 4c 8d 6d 10 48 b8 00 00 00 00 00
RSP: 0018:ffffc900019bfcc0 EFLAGS: 00000246
RAX: 00000000dead4ead RBX: 1ffff92000337f99 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88805a89086c
RBP: ffff88805a890868 R08: 0000000000000000 R09: ffffffff8ed317b7
R10: fffffbfff1da62f6 R11: 0000000000000001 R12: ffff8880556a3100
R13: ffff88805a8904a0 R14: ffff88805a890868 R15: ffff88805a890028
 spin_lock include/linux/spinlock.h:354 [inline]
 task_lock include/linux/sched/task.h:166 [inline]
 mm_update_next_owner+0x21a/0x7a0 kernel/exit.c:413
 exit_mm kernel/exit.c:500 [inline]
 do_exit+0xb62/0x2ae0 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 __do_sys_exit_group kernel/exit.c:933 [inline]
 __se_sys_exit_group kernel/exit.c:931 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: Unable to access opcode bytes at RIP 0x45e1ef.
RSP: 002b:00007f38e907b688 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 000000000045e219
RDX: 000000000045e219 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fffaa50446f R14: 00007f38e907c9c0 R15: 000000000119bf8c