rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=c81/1/0x4000000000000000 softirq=27398/27399 fqs=5246 
	(t=10501 jiffies g=41481 q=1449)
NMI backtrace for cpu 0
CPU: 0 PID: 12078 Comm: syz.1.1870 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x22d/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31f/0x5f0 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x6ec/0x1120 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:2021
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4b0/0xb60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1108
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:nf_in_range+0x0/0x4a0 net/netfilter/nf_nat_core.c:247
Code: 3d 86 f9 e9 7e fd ff ff 44 89 f1 80 e1 07 38 c1 0f 8c d6 fd ff ff 4c 89 f7 e8 7c 3d 86 f9 e9 c9 fd ff ff 0f 1f 80 00 00 00 00 <55> 41 57 41 56 41 55 41 54 53 48 89 f3 49 89 fe 49 bd 00 00 00 00
RSP: 0018:ffffc90000006958 EFLAGS: 00010246
RAX: ffffffff8837eea9 RBX: 0000000000000000 RCX: ffff88807ba15940
RDX: 0000000000000100 RSI: ffffc90000006da0 RDI: ffffc90000006bd0
RBP: ffffc90000006d10 R08: ffff88807ba15940 R09: 0000000000000002
R10: 000000000000003a R11: 0000000000000100 R12: ffff88807db97b00
R13: dffffc0000000000 R14: ffffc90000006bd0 R15: ffffc90000006da0
 get_unique_tuple net/netfilter/nf_nat_core.c:526 [inline]
 nf_nat_setup_info+0x523/0x2160 net/netfilter/nf_nat_core.c:605
 __nf_nat_alloc_null_binding net/netfilter/nf_nat_core.c:664 [inline]
 nf_nat_alloc_null_binding net/netfilter/nf_nat_core.c:670 [inline]
 nf_nat_inet_fn+0x792/0xad0 net/netfilter/nf_nat_core.c:749
 nf_nat_ipv6_fn+0x223/0x2e0 net/netfilter/nf_nat_proto.c:937
 nf_nat_ipv6_out+0x2a/0x360 net/netfilter/nf_nat_proto.c:966
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xb9/0x200 net/netfilter/core.c:584
 nf_hook+0x205/0x360 include/linux/netfilter.h:257
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip6_output+0x273/0x3b0 net/ipv6/ip6_output.c:236
 ip6tunnel_xmit include/net/ip6_tunnel.h:160 [inline]
 udp_tunnel6_xmit_skb+0x4b7/0x8b0 net/ipv6/ip6_udp_tunnel.c:110
 geneve6_xmit_skb drivers/net/geneve.c:1087 [inline]
 geneve_xmit+0x2295/0x3240 drivers/net/geneve.c:1116
 __netdev_start_xmit include/linux/netdevice.h:5049 [inline]
 netdev_start_xmit include/linux/netdevice.h:5063 [inline]
 xmit_one net/core/dev.c:3663 [inline]
 dev_hard_start_xmit+0x297/0x7d0 net/core/dev.c:3679
 __dev_queue_xmit+0x195d/0x2e50 net/core/dev.c:4306
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0x1174/0x1640 net/ipv6/ip6_output.c:132
 dst_output include/net/dst.h:452 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xb7c/0x1410 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3974
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lock_is_held_type+0x13a/0x190 kernel/locking/lockdep.c:5813
Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900014ef7f8 EFLAGS: 00000206
RAX: ca857b56327a7700 RBX: ffff88807ba15940 RCX: ca857b56327a7700
RDX: 0000000000000010 RSI: ffffffff8a2b3e00 RDI: ffffffff8a7a4bc0
RBP: 0000000000000000 R08: ffffc900014ef9af R09: ffffc900014ef9a0
R10: dffffc0000000000 R11: fffff5200029df36 R12: ffff8880b8e00000
R13: 0000000000000246 R14: ffffffff8d11f060 R15: 00000000ffffffff
 lock_is_held include/linux/lockdep.h:292 [inline]
 schedule_debug kernel/sched/core.c:5621 [inline]
 __schedule+0x234/0x4350 kernel/sched/core.c:6286
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x22b/0x440 kernel/futex/core.c:2866
 futex_wait+0x256/0x680 kernel/futex/core.c:2967
 do_futex+0xdc2/0x12b0 kernel/futex/core.c:4018
 __do_sys_futex kernel/futex/core.c:4095 [inline]
 __se_sys_futex+0x389/0x420 kernel/futex/core.c:4076
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ffb75c41559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffb73e560e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ffb75ec8188 RCX: 00007ffb75c41559
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ffb75ec8188
RBP: 00007ffb75ec8180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffb75ec8218 R14: 00007ffdb15f1ee0 R15: 00007ffdb15f1fc8
 </TASK>