rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (2 GPs behind) idle=aa9/1/0x4000000000000000 softirq=13079/13080 fqs=2100 
	(detected by 0, t=10503 jiffies, g=13169, q=701)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4915 Comm: kworker/1:18 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events iterate_cleanup_work
RIP: 0010:__lock_acquire+0xf46/0x1ff0 kernel/locking/lockdep.c:5007
Code: cb 01 d6 29 da 89 dd c1 c5 13 31 d5 01 f3 29 ee 01 eb c1 c5 04 31 f5 48 c1 e5 20 48 c7 c0 18 bb 0a 8e 48 c1 e8 03 0f b6 04 38 <84> c0 0f 85 88 0b 00 00 48 09 dd 83 3d 70 d8 a7 0c 00 4c 8b 7c 24
RSP: 0018:ffffc90000dd0a60 EFLAGS: 00000806
RAX: 0000000000000000 RBX: 00000000dbce5be0 RCX: 00000000027cd9bd
RDX: 00000000e1de5344 RSI: 000000003d51f028 RDI: dffffc0000000000
RBP: 3fbbcbf400000000 R08: dffffc0000000000 R09: fffffbfff2131848
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003
R13: ffff888072054668 R14: 1ffff1100e40a8cc R15: 00000000000009dd
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1440e47000 CR3: 00000000252b8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:363 [inline]
 advance_sched+0x47/0x940 net/sched/sch_taprio.c:716
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/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:nf_ct_iterate_cleanup+0x36d/0x3b0 net/netfilter/nf_conntrack_core.c:2381
Code: 00 31 d2 e8 85 a9 bd f8 2e 2e 2e 31 c0 ff c5 3b 2d 0c 83 6f 05 73 23 e8 c1 e5 e4 f8 e9 06 fd ff ff e8 b7 e5 e4 f8 48 8b 2c 24 <eb> e1 e8 ac e5 e4 f8 eb af e8 a5 e5 e4 f8 eb 13 e8 9e e5 e4 f8 eb
RSP: 0018:ffffc9000303faf0 EFLAGS: 00000293
RAX: ffffffff889b9fd9 RBX: ffff88802bf07460 RCX: ffff888072053b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000020e8c R08: ffffffff889b9d2e R09: fffffbfff2131833
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc9000303fb80 R14: 1ffff110057e0e8c R15: ffffffff889ba020
 nf_ct_iterate_cleanup_net+0x15e/0x1d0 net/netfilter/nf_conntrack_core.c:2465
 iterate_cleanup_work+0x63/0x110 net/netfilter/nf_nat_masquerade.c:83
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>