rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6729/1:b..l
	(detected by 1, t=10502 jiffies, g=222845, q=34 ncpus=2)
task:kworker/u4:14   state:R  running task     stack:20248 pid:6729  ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 7f a0 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc900132df900 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200265bf2c RCX: 1ffff9200265becc
RDX: dffffc0000000000 RSI: ffffffff8aebfec0 RDI: ffffffff8b3d1040
RBP: ffffc900132dfa48 R08: dffffc0000000000 R09: fffffbfff2092645
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200265bf28
R13: dffffc0000000000 R14: ffffc900132df960 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:319 [inline]
 rcu_read_lock include/linux/rcupdate.h:760 [inline]
 inet_twsk_purge+0x164/0xb60 net/ipv4/inet_timewait_sock.c:295
 ops_exit_list net/core/net_namespace.c:174 [inline]
 cleanup_net+0x763/0xb60 net/core/net_namespace.c:601
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g222845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=114292
rcu: rcu_preempt kthread starved for 10502 jiffies! g222845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26680 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2334 Comm: syz-executor.1 Not tainted 6.1.79-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:35 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:lock_is_held_type+0x65/0x180 kernel/locking/lockdep.c:5701
Code: 00 00 65 4c 8b 2d 4b d4 77 75 41 83 bd dc 0a 00 00 00 0f 85 db 00 00 00 41 89 f6 49 89 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 <4c> 8b 24 24 fa 48 c7 c7 20 fa eb 8a e8 9a 16 00 00 65 ff 05 93 dd
RSP: 0000:ffffc90013c27bb8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888020210000
RDX: ffff888020210000 RSI: 00000000ffffffff RDI: ffff88802236b300
RBP: 00000000ffffffff R08: ffffffff88b5003b R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff88802236b000
R13: ffff888020210000 R14: 00000000ffffffff R15: ffff88802236b300
FS:  0000555555854480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33021000 CR3: 000000007c673000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_is_held include/linux/lockdep.h:283 [inline]
 advance_sched+0x13d/0x970 net/sched/sch_taprio.c:705
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0033:0x7f87fcc39acb
Code: 00 09 c5 80 3d 06 bc c9 00 00 0f 85 6f ff ff ff 44 0f b6 6c 24 0f 44 8d 55 04 89 e8 41 89 c1 41 81 e1 ff 1f 00 00 43 8b 14 8e <39> d5 0f 84 5e ff ff ff 85 d2 0f 84 65 01 00 00 83 c0 01 41 39 c2
RSP: 002b:00007fff9e374680 EFLAGS: 00000206
RAX: 0000000081baf26c RBX: 00007f87fcdac018 RCX: 000000000003840e
RDX: 0000000081baf26c RSI: 0000000080000000 RDI: 000000000000defd
RBP: 0000000081baf26c R08: 0000001b33520000 R09: 000000000000126c
R10: 0000000081baf270 R11: 0000000000000246 R12: 000000000003840e
R13: 0000000000000001 R14: 00007f87fcda0000 R15: ffffffff81bafdf9
 </TASK>