rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10514 jiffies, g=24557, q=918 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 8305 (4294971640-4294963335), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 8305 jiffies! g24557 f0x2 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
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:27496 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7376
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6001 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: events_power_efficient gc_worker
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 1b 88 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 45 1e 00 fb f4 <e9> 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc90000007588 EFLAGS: 00000246
RAX: ffffffff81774e2c RBX: 0000000000000003 RCX: ffff8880226d9f40
RDX: 0000000000000300 RSI: 0000000000000100 RDI: ffffffff8c6ddb80
RBP: 0000000000000003 R08: ffffffff917a487f R09: 1ffffffff22f490f
R10: dffffc0000000000 R11: fffffbfff22f4910 R12: 0000000000000200
R13: 0000000000000000 R14: ffff888022bb1340 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888123aba000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffc9ebdcf0 CR3: 000000007dcc8000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
 kvm_wait+0x111/0x160 arch/x86/kernel/kvm.c:1124
 pv_wait arch/x86/include/asm/paravirt-spinlock.h:88 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x74a/0xbc0 kernel/locking/qspinlock.c:347
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:37 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:71 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:115 [inline]
 do_raw_spin_lock+0x26c/0x2f0 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:353 [inline]
 ___neigh_create+0xf35/0x21f0 net/core/neighbour.c:693
 ip6_finish_output2+0xe06/0x1460 net/ipv6/ip6_output.c:130
 NF_HOOK_COND include/linux/netfilter.h:314 [inline]
 ip6_output+0x337/0x540 net/ipv6/ip6_output.c:248
 dst_output include/net/dst.h:472 [inline]
 NF_HOOK include/linux/netfilter.h:325 [inline]
 ndisc_send_skb+0xcb2/0x1650 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2d2/0x6c0 net/ipv6/addrconf.c:4078
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x11/0xb0 kernel/rcu/tree.c:753
Code: 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 48 ff 05 1f b2 e9 12 <e8> 7a b5 3e 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90002e4f8f8 EFLAGS: 00000283
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff8880226d9f40
RDX: 0000000000000000 RSI: ffffffff8a03f6e4 RDI: ffffffff8fd5c8e0
RBP: ffffc90002e4fad0 R08: ffffffff917a487f R09: 1ffffffff22f490f
R10: dffffc0000000000 R11: fffffbfff22f4910 R12: dffffc0000000000
R13: ffffffff8a03f6e4 R14: ffffffff8fd5c8e0 R15: 000000000001c5b1
 trace_lock_release include/trace/events/lock.h:68 [inline]
 lock_release+0x4b/0x3c0 kernel/locking/lockdep.c:5954
 rcu_lock_release include/linux/rcupdate.h:319 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 gc_worker+0x1084/0x1890 net/netfilter/nf_conntrack_core.c:1607
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>