rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=12d4/1/0x4000000000000000 softirq=18017/18022 fqs=1
rcu: 	(detected by 0, t=10502 jiffies, g=12353, q=526 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 78 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:842 [inline]
RIP: 0010:advance_sched+0xa1d/0xc90 net/sched/sch_taprio.c:990
Code: 1d 00 00 00 00 48 c7 c7 e0 a0 13 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 53 e8 1c b6 01 f8 48 83 c4 08 e8 c3 67 df 01 <89> c5 31 ff 89 c6 e8 a8 0a 24 f8 85 ed 74 10 e8 bf b8 0a f8 84 c0
RSP: 0018:ffffc90000a08c70 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffffff899ba6f8 RCX: ffff88801c7b9e00
RDX: 0000000000000001 RSI: ffffffff8dba98f7 RDI: ffffffff8be33f00
RBP: ffff88807bccd550 R08: 0000000000000000 R09: ffffffff899ba6f8
R10: dffffc0000000000 R11: ffffed100f22625e R12: ffff888079131360
R13: ffff888079131000 R14: 1866c847191846f9 R15: ffff88807bccd000
FS:  0000000000000000(0000) GS:ffff888125d13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000600 CR3: 000000000df36000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 5b b8 49 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 5e 12 f6 65 8b 05 6c 31 23 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc9000217eae0 EFLAGS: 00000206
RAX: 8e4bb24cfba4b100 RBX: 0000000000000a06 RCX: 8e4bb24cfba4b100
RDX: 0000000000000002 RSI: ffffffff8d9ba1da RDI: 0000000000000001
RBP: ffffc9000217eb70 R08: ffffffff8fa38f37 R09: 1ffffffff1f471e6
R10: dffffc0000000000 R11: fffffbfff1f471e7 R12: dffffc0000000000
R13: ffff88807505f738 R14: ffffffff99d83dd0 R15: 1ffff9200042fd5c
 debug_object_activate+0x2e2/0x420 lib/debugobjects.c:836
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3108 [inline]
 call_rcu+0xaa/0x9c0 kernel/rcu/tree.c:3243
 refdst_drop include/net/dst.h:266 [inline]
 skb_dst_drop include/net/dst.h:278 [inline]
 __dev_queue_xmit+0x85c/0x3b50 net/core/dev.c:4712
 dev_queue_xmit_accel include/linux/netdevice.h:3371 [inline]
 macvlan_queue_xmit drivers/net/macvlan.c:557 [inline]
 macvlan_start_xmit+0x46d/0x6e0 drivers/net/macvlan.c:581
 __netdev_start_xmit include/linux/netdevice.h:5252 [inline]
 netdev_start_xmit include/linux/netdevice.h:5261 [inline]
 xmit_one net/core/dev.c:3839 [inline]
 dev_hard_start_xmit+0x2d7/0x830 net/core/dev.c:3855
 __dev_queue_xmit+0x1b8d/0x3b50 net/core/dev.c:4757
 neigh_output include/net/neighbour.h:547 [inline]
 ip6_finish_output2+0xfb0/0x1480 net/ipv6/ip6_output.c:136
 NF_HOOK_COND include/linux/netfilter.h:307 [inline]
 ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512
 ndisc_send_ns+0xcb/0x150 net/ipv6/ndisc.c:670
 addrconf_dad_work+0xaae/0x14b0 net/ipv6/addrconf.c:4282
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g12353 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3457
rcu: rcu_preempt kthread starved for 10500 jiffies! g12353 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:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>