rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 ticks this GP) idle=5b44/1/0x4000000000000000 softirq=20139/20139 fqs=82
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 1500(ms)
rcu: 	(detected by 1, t=10502 jiffies, g=21309, q=2036 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5662 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_power_efficient gc_worker
RIP: 0010:taprio_set_budgets+0x368/0x3a0 net/sched/sch_taprio.c:680
Code: f7 48 c7 c7 a0 b2 2b 90 4c 89 e6 e8 12 b7 2e fb 4c 8b 7c 24 08 e9 3e fe ff ff e8 63 09 da f7 eb 05 e8 5c 09 da f7 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07
RSP: 0018:ffffc90000007cc0 EFLAGS: 00000086
RAX: ffffffff89edc91d RBX: ffff8880723d6530 RCX: ffff8880338cbe80
RDX: 0000000001000001 RSI: 0000000001000001 RDI: ffff8880723d7084
RBP: 00000000000009fd R08: ffff8880723d7087 R09: 1ffff1100e47ae10
R10: dffffc0000000000 R11: ffffed100e47ae11 R12: 0000000000000001
R13: ffff8880723d7008 R14: 0000000000000004 R15: ffff8880723d7084
FS:  0000000000000000(0000) GS:ffff888124cce000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f051a56feb8 CR3: 000000000eb48000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 advance_sched+0x970/0xc80 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:2074 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2131
 hrtimer_interrupt+0x4cd/0xaa0 kernel/time/hrtimer.c:2250
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:seqcount_lockdep_reader_access+0xed/0x100 include/linux/seqlock.h:76
Code: 00 75 11 e8 45 02 c7 f7 4d 85 f6 75 16 e8 3b 02 c7 f7 eb 15 e8 34 02 c7 f7 e8 6f e4 e4 01 4d 85 f6 74 ea e8 25 02 c7 f7 fb 5b <41> 5e e9 fc e8 e7 01 cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90
RSP: 0018:ffffc90003bf7970 EFLAGS: 00000293
RAX: ffffffff8a00d05b RBX: 0000000000000001 RCX: ffff8880338cbe80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003bf7ad0 R08: ffffffff907a417f R09: 1ffffffff20f482f
R10: dffffc0000000000 R11: fffffbfff20f4830 R12: dffffc0000000000
R13: ffffffff818f9dba R14: 0000000000000200 R15: 0000000000006718
 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:343 [inline]
 gc_worker+0x31b/0x1890 net/netfilter/nf_conntrack_core.c:1534
 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>