rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=85441, q=138 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10494 (4295081762-4295071268), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10494 jiffies! g85441 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:26680 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6554
 schedule+0xbf/0x180 kernel/sched/core.c:6630
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11759 Comm: kworker/1:27 Not tainted 6.1.55-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:check_preemption_disabled+0x4/0x110 lib/smp_processor_id.c:13
Code: 48 89 de e8 ee 3c d9 f9 e9 6d ff ff ff cc cc cc cc cc cc cc cc cc 48 c7 c7 60 ea 3c 8b 48 c7 c6 a0 ea 3c 8b eb 00 41 57 41 56 <41> 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65
RSP: 0018:ffffc900001e0b48 EFLAGS: 00000086
RAX: 0000000000000001 RBX: ffffc900001e0bc0 RCX: ffffffff816af3f5
RDX: dffffc0000000000 RSI: ffffffff8aebf420 RDI: ffffffff8b3ceac0
RBP: ffffc900001e0ca8 R08: dffffc0000000000 R09: fffffbfff2092e46
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c174
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000046
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200bd038 CR3: 0000000081c6d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lock_acquire+0x208/0x5a0 kernel/locking/lockdep.c:5663
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x6d3/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 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+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:console_emit_next_record+0xc69/0xea0 kernel/printk/printk.c:2751
Code: 00 e8 7b 37 1c 00 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 6b 37 1c 00 eb 06 e8 64 37 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <42> c7 04 2b 00 00 00 00 4a c7 44 2b 0a 00 00 00 00 4a c7 44 2b 12
RSP: 0018:ffffc90005c3efc0 EFLAGS: 00000287
RAX: ffffffff816e3bac RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc90013ec9000 RSI: 000000000003cb23 RDI: 000000000003cb24
RBP: ffffc90005c3f270 R08: ffffffff816e3b87 R09: fffffbfff2092e45
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: 1ffff92000b87e0c R14: 0000000000000001 R15: 0000000000000000
 console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
 vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
 dev_vprintk_emit+0x2aa/0x323 drivers/base/core.c:4895
 dev_printk_emit+0xd9/0x118 drivers/base/core.c:4906
 _dev_info+0x11e/0x165 drivers/base/core.c:4964
 show_string drivers/usb/core/hub.c:2289 [inline]
 announce_device drivers/usb/core/hub.c:2308 [inline]
 usb_new_device+0x101f/0x18e0 drivers/usb/core/hub.c:2556
 hub_port_connect drivers/usb/core/hub.c:5415 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5555 [inline]
 port_event drivers/usb/core/hub.c:5711 [inline]
 hub_event+0x2efe/0x5710 drivers/usb/core/hub.c:5793
 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>
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [kworker/u4:11:3800]
Modules linked in:
irq event stamp: 10230330
hardirqs last  enabled at (10230329): [<ffffffff8aa00cc6>] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
hardirqs last disabled at (10230330): [<ffffffff8a88acda>] sysvec_apic_timer_interrupt+0xa/0xb0 arch/x86/kernel/apic/apic.c:1106
softirqs last  enabled at (10180928): [<ffffffff81540005>] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last  enabled at (10180928): [<ffffffff81540005>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
softirqs last disabled at (10180883): [<ffffffff81540005>] invoke_softirq kernel/softirq.c:445 [inline]
softirqs last disabled at (10180883): [<ffffffff81540005>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
CPU: 0 PID: 3800 Comm: kworker/u4:11 Not tainted 6.1.55-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline]
RIP: 0010:smp_call_function_many_cond+0x1f62/0x33d0 kernel/smp.c:987
Code: 2f 44 89 ee 83 e6 01 31 ff e8 da 35 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 65 32 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff
RSP: 0018:ffffc900048df5a0 EFLAGS: 00000293
RAX: ffffffff817f40cd RBX: 1ffff11017328031 RCX: ffff8880867e3b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900048df980 R08: ffffffff817f4096 R09: fffffbfff2092e45
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940188
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd9eaf9fc8 CR3: 000000000ce8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1316 [inline]
 text_poke_bp_batch+0x5f9/0x940 arch/x86/kernel/alternative.c:1578
 text_poke_flush arch/x86/kernel/alternative.c:1707 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1714
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x12e/0x250 kernel/jump_label.c:177
 static_key_enable+0x16/0x20 kernel/jump_label.c:190
 toggle_allocation_gate+0xbf/0x480 mm/kfence/core.c:804
 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>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11759 Comm: kworker/1:27 Not tainted 6.1.55-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0xa5/0x370 kernel/locking/spinlock_debug.c:114
Code: 0f b6 04 10 84 c0 0f 85 f1 01 00 00 8b 03 3d ad 4e ad de 0f 85 5d 01 00 00 4d 8d 6c 24 10 4c 89 e8 48 c1 e8 03 48 89 44 24 20 <80> 3c 10 00 74 12 4c 89 ef e8 ad fd 75 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc900001e0b60 EFLAGS: 00000802
RAX: 1ffffffff23d6fdc RBX: ffffffff91eb7ed4 RCX: 1ffff9200003c174
RDX: dffffc0000000000 RSI: 1ffff9200003c174 RDI: ffffffff91eb7ed0
RBP: ffffc900001e0c30 R08: dffffc0000000000 R09: fffffbfff2092e45
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff91eb7ed0
R13: ffffffff91eb7ee0 R14: ffffffff91eb7ed0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200bd038 CR3: 0000000081c6d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0xdd/0x120 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x61/0x420 lib/debugobjects.c:772
 debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
 debug_deactivate+0x1d/0x280 kernel/time/hrtimer.c:481
 __run_hrtimer kernel/time/hrtimer.c:1653 [inline]
 __hrtimer_run_queues+0x334/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 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+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:console_emit_next_record+0xc69/0xea0 kernel/printk/printk.c:2751
Code: 00 e8 7b 37 1c 00 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 6b 37 1c 00 eb 06 e8 64 37 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <42> c7 04 2b 00 00 00 00 4a c7 44 2b 0a 00 00 00 00 4a c7 44 2b 12
RSP: 0018:ffffc90005c3efc0 EFLAGS: 00000287
RAX: ffffffff816e3bac RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc90013ec9000 RSI: 000000000003cb23 RDI: 000000000003cb24
RBP: ffffc90005c3f270 R08: ffffffff816e3b87 R09: fffffbfff2092e45
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: 1ffff92000b87e0c R14: 0000000000000001 R15: 0000000000000000
 console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
 vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
 dev_vprintk_emit+0x2aa/0x323 drivers/base/core.c:4895
 dev_printk_emit+0xd9/0x118 drivers/base/core.c:4906
 _dev_info+0x11e/0x165 drivers/base/core.c:4964
 show_string drivers/usb/core/hub.c:2289 [inline]
 announce_device drivers/usb/core/hub.c:2308 [inline]
 usb_new_device+0x101f/0x18e0 drivers/usb/core/hub.c:2556
 hub_port_connect drivers/usb/core/hub.c:5415 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5555 [inline]
 port_event drivers/usb/core/hub.c:5711 [inline]
 hub_event+0x2efe/0x5710 drivers/usb/core/hub.c:5793
 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>