rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=180593, q=337 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4295081979-4295071479), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g180593 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27584 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.11.0-rc6-syzkaller-00048-gc7fb1692dc01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: netns cleanup_net
RIP: 0010:match_held_lock+0x1/0xc0 kernel/locking/lockdep.c:5205
Code: c7 c7 40 d9 4c 8b e8 be 40 37 f6 90 0f 0b 90 90 e9 62 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 53 <48> 39 77 10 48 89 fb 74 55 66 83 7f 22 1f 76 65 48 8b 46 08 48 89
RSP: 0018:ffffc90000a18de0 EFLAGS: 00000093
RAX: 0000000000000019 RBX: ffff88801d2c65a8 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff8880b892c9d8 RDI: ffff88801d2c65a8
RBP: ffff8880b892c9d8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff8b4f62e0 R12: ffff88801d2c5a00
R13: ffff88801d2c64e0 R14: 00000000ffffffff R15: 0000000000000005
FS:  0000000000000000(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f71bff8 CR3: 0000000073228000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __lock_is_held kernel/locking/lockdep.c:5500 [inline]
 lock_is_held_type+0xb0/0x150 kernel/locking/lockdep.c:5831
 lock_is_held include/linux/lockdep.h:249 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1655 [inline]
 __hrtimer_run_queues+0x960/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
 </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+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 06 23 50 f6 48 89 df e8 1e a0 50 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 45 13 42 f6 65 8b 05 c6 4d ea 74 85 c0 74 16 5b
RSP: 0018:ffffc90000117428 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffffffff9a52fe78 RCX: 1ffffffff2d25141
RDX: 0000000000000000 RSI: ffffffff8b4cd740 RDI: ffffffff8bb0f980
RBP: 0000000000000206 R08: 0000000000000001 R09: fffffbfff2d244e1
R10: ffffffff9692270f R11: ffffffff8b4e5fe0 R12: 0000000000000001
R13: ffff888037389640 R14: 1ffff92000022e8c R15: ffffffff9a52fe70
 debug_object_activate+0x34d/0x540 lib/debugobjects.c:727
 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline]
 __call_rcu_common.constprop.0+0x2c/0x790 kernel/rcu/tree.c:3091
 kernfs_put.part.0+0x176/0x3a0 fs/kernfs/dir.c:578
 kernfs_put+0x47/0x50 fs/kernfs/dir.c:557
 kernfs_remove_by_name_ns+0xbc/0x130 fs/kernfs/dir.c:1695
 kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
 sysfs_unmerge_group+0xe7/0x170 fs/sysfs/group.c:399
 rpm_sysfs_remove drivers/base/power/sysfs.c:826 [inline]
 dpm_sysfs_remove+0x7f/0xb0 drivers/base/power/sysfs.c:835
 device_del+0x1a1/0x9f0 drivers/base/core.c:3846
 unregister_netdevice_many_notify+0x103b/0x1e40 net/core/dev.c:11386
 unregister_netdevice_many net/core/dev.c:11414 [inline]
 unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11289
 unregister_netdevice include/linux/netdevice.h:3129 [inline]
 nsim_destroy+0x107/0x6a0 drivers/net/netdevsim/netdev.c:778
 __nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1425
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1437 [inline]
 nsim_dev_reload_destroy+0x108/0x4d0 drivers/net/netdevsim/dev.c:1658
 nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:965
 devlink_reload+0x19a/0x7c0 net/devlink/dev.c:461
 devlink_pernet_pre_exit+0x1a1/0x2b0 net/devlink/core.c:509
 ops_pre_exit_list net/core/net_namespace.c:163 [inline]
 cleanup_net+0x488/0xbb0 net/core/net_namespace.c:620
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>