rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=6134/1/0x4000000000000000 softirq=57927/57929 fqs=146
	(detected by 0, t=10502 jiffies, g=86613, q=646 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6 Comm: netns Not tainted 6.1.0-rc7-syzkaller-00012-gca57f02295f1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: netns cleanup_net
RIP: 0010:rcu_read_unlock_sched_notrace include/linux/rcupdate.h:860 [inline]
RIP: 0010:trace_hrtimer_cancel+0xf1/0x2f0 include/trace/events/timer.h:293
Code: c3 31 ff 89 c6 e8 ef 90 10 00 85 db 74 2c e8 c6 8c 10 00 31 f6 65 ff 0d 95 68 86 7e 0f 94 c3 40 0f 94 c6 31 ff e8 8f 8f 10 00 <84> db 75 69 e8 a6 8c 10 00 5b 41 5e 41 5f 5d c3 e8 7a f8 2a 09 89
RSP: 0018:ffffc900001e0cf8 EFLAGS: 00000046
RAX: ffffffff817c06aa RBX: 0000000000000000 RCX: 0000000080010202
RDX: ffff88813fec9d40 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffffffff817c06c1 R09: fffffbfff1d1f4f6
R10: fffffbfff1d1f4f6 R11: 1ffffffff1d1f4f5 R12: ffff8880b992a4c0
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807489b340
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd78081738 CR3: 000000007c6eb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 debug_deactivate kernel/time/hrtimer.c:482 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1653 [inline]
 __hrtimer_run_queues+0x301/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3a6/0xfd0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_release+0x5d5/0x870 kernel/locking/lockdep.c:5692
Code: 3c 23 00 74 08 4c 89 f7 e8 78 80 75 00 f6 84 24 91 00 00 00 02 75 68 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 4b c7 44 3c 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900000b7720 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000016ef6 RCX: ffffc900000b7703
RDX: 0000000000000004 RSI: ffffffff8b0da2a0 RDI: ffffffff8b68fcc0
RBP: ffffc900000b7850 R08: dffffc0000000000 R09: fffffbfff1d1f4f6
R10: fffffbfff1d1f4f6 R11: 1ffffffff1d1f4f5 R12: dffffc0000000000
R13: 0000000000000246 R14: ffffc900000b77b0 R15: 1ffff92000016ef0
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:165 [inline]
 _raw_spin_unlock_bh+0x17/0x30 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 clusterip_netdev_event+0x443/0x460 net/ipv4/netfilter/ipt_CLUSTERIP.c:233
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1945 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]
 call_netdevice_notifiers net/core/dev.c:1997 [inline]
 unregister_netdevice_many+0xfde/0x1a30 net/core/dev.c:10847
 sit_exit_batch_net+0x495/0x4e0 net/ipv6/sit.c:1885
 ops_exit_list net/core/net_namespace.c:174 [inline]
 cleanup_net+0x80c/0xc50 net/core/net_namespace.c:601
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 rescuer_thread+0x7f5/0x10e0 kernel/workqueue.c:2543
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: rcu_preempt kthread starved for 10157 jiffies! g86613 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:26360 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0x8fc/0xda0 kernel/sched/core.c:6521
 schedule+0xcb/0x190 kernel/sched/core.c:6597
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x309/0x1070 kernel/rcu/tree.c:1660
 rcu_gp_kthread+0xa5/0x390 kernel/rcu/tree.c:1859
 kthread+0x266/0x300 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:
CPU: 0 PID: 20572 Comm: udevd Not tainted 6.1.0-rc7-syzkaller-00012-gca57f02295f1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline]
RIP: 0010:smp_call_function_many_cond+0xe92/0x1420 kernel/smp.c:987
Code: 84 c0 75 74 45 8b 26 44 89 e6 83 e6 01 31 ff e8 e4 3d 0b 00 41 83 e4 01 75 0e e8 b9 39 0b 00 eb 4c 0f 1f 80 00 00 00 00 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 10 41 f7 06 01
RSP: 0018:ffffc9000582f7c0 EFLAGS: 00000293
RAX: ffffffff818159e2 RBX: 1ffff11017328021 RCX: ffff888027441d40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000582f960 R08: ffffffff818159ac R09: fffff52000b05ee9
R10: fffff52000b05ee9 R11: 1ffff92000b05ee8 R12: 0000000000000001
R13: 0000000000000001 R14: ffff8880b9940108 R15: ffff8880b983ae80
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559872b1a0c0 CR3: 000000007bf84000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:924 [inline]
 flush_tlb_mm_range+0x36a/0x5a0 arch/x86/mm/tlb.c:1010
 tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:426 [inline]
 tlb_flush_mmu+0x1b5/0xa70 mm/mmu_gather.c:262
 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:363
 exit_mmap+0x2b1/0x670 mm/mmap.c:3105
 __mmput+0x114/0x3b0 kernel/fork.c:1185
 exit_mm+0x217/0x2f0 kernel/exit.c:516
 do_exit+0x5e7/0x2070 kernel/exit.c:807
 do_group_exit+0x1fd/0x2b0 kernel/exit.c:950
 __do_sys_exit_group kernel/exit.c:961 [inline]
 __se_sys_exit_group kernel/exit.c:959 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:959
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6bcc503309
Code: Unable to access opcode bytes at 0x7f6bcc5032df.
RSP: 002b:00007ffd7808b5b8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6bcc503309
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: fffffffffffffe68 R09: 0000559872b0d910
R10: 00000000ffffffff R11: 0000000000000202 R12: 0000559872b33450
R13: 00007ffd7808b5f8 R14: 0000000000000001 R15: 0000559872b0d910
 </TASK>