rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2648 jiffies s: 69301 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6777 Comm: kworker/u4:10 Not tainted 6.5.0-rc2-syzkaller-00612-gac3cb6de32b6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: netns cleanup_net
RIP: 0010:pie_calculate_probability+0x3b5/0x850 net/sched/sch_pie.c:397
Code: 2c f9 4d 85 e4 75 31 e8 b9 e8 2c f9 44 0f b6 7c 24 2f 31 ff 44 89 fe e8 d9 e3 2c f9 45 84 ff 74 17 e8 9f e8 2c f9 48 8b 43 20 <48> 89 c2 48 c1 ea 06 48 29 d0 48 89 43 20 e8 88 e8 2c f9 48 8d 7b
RSP: 0018:ffffc900001e0bc0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9001a5ac450 RCX: 0000000000000100
RDX: ffff888040e55940 RSI: ffffffff88599591 RDI: 0000000000000001
RBP: ffff88802a7c2300 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 00000000485363e3 R12: 0000000000000000
R13: 0000000000000000 R14: fffffff0a3da8872 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f422000 CR3: 000000002e5dc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_is_held_type+0x104/0x140 kernel/locking/lockdep.c:5837
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 37 51 cf 75 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc900091a7a38 EFLAGS: 00000282
RAX: 0000000000000046 RBX: ffff888040e56458 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8a6c7a00 RDI: ffffffff8ac810e0
RBP: ffffffff8c9a6500 R08: 0000000000000004 R09: 000000000007ffff
R10: 000000000000cc45 R11: 1ffffffff1936279 R12: ffff888040e55940
R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000003
 lock_is_held include/linux/lockdep.h:288 [inline]
 __might_resched+0x4cf/0x5e0 kernel/sched/core.c:10151
 inet_twsk_purge+0x10a/0x920 net/ipv4/inet_timewait_sock.c:291
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x687/0x1110 kernel/workqueue.c:2748
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>