rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 GPs behind) idle=1e1/1/0x4000000000000000 softirq=9629/9639 fqs=9 
	(detected by 1, t=10940 jiffies, g=12053, q=1437)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4262 Comm: kworker/0:12 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events_power_efficient gc_worker
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
RIP: 0010:rcu_is_watching+0x51/0xa0 kernel/rcu/tree.c:1123
Code: f8 ba 8b 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 00 9b 59 00 48 c7 c3 c8 b2 03 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 2b 8b 03 65 ff 0d 95 d3 9e 7e 74 08 24 01
RSP: 0018:ffffc90000007b40 EFLAGS: 00000806
RAX: 1ffff11017207659 RBX: ffff8880b903b2c8 RCX: 3cac0512b32c6000
RDX: 0000000000000000 RSI: ffffffff8a59a6e0 RDI: ffffffff8a59a6a0
RBP: ffffc90000007c70 R08: dffffc0000000000 R09: fffffbfff1ad1556
R10: fffffbfff1ad1556 R11: 1ffffffff1ad1555 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8bbaf810 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000600 CR3: 0000000070912000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0xba/0x870 kernel/locking/lockdep.c:5634
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_unlock_irqrestore+0x6d/0x100 kernel/locking/spinlock.c:194
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x441/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:88 [inline]
RIP: 0010:lock_release+0xe7/0x870 kernel/locking/lockdep.c:5636
Code: 84 34 05 00 00 48 c7 c0 44 de 68 8d 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 3c 05 00 00 83 3d 23 77 0c 0c 00 0f 84 94 04 00 00 <65> 8b 05 d2 11 a6 7e 85 c0 0f 85 85 04 00 00 65 48 8b 1d 82 08 a6
RSP: 0018:ffffc90002f9f9c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 3cac0512b32c6000
RDX: 0000000000000000 RSI: ffffffff8a59a6e0 RDI: ffffffff8a59a6a0
RBP: ffffc90002f9fad0 R08: dffffc0000000000 R09: fffffbfff1ad1556
R10: fffffbfff1ad1556 R11: 1ffffffff1ad1555 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000008b7c R15: 1ffff920005f3f44
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 gc_worker+0xc3f/0x13a0 net/netfilter/nf_conntrack_core.c:1543
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 728 jiffies! g12053 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=6970
rcu: rcu_preempt kthread starved for 729 jiffies! g12053 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28032 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x29e/0x11b0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x98/0x350 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 5038 Comm: syz-executor Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <IRQ>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_check_gp_kthread_starvation+0x1cd/0x250 kernel/rcu/tree_stall.h:487
 print_other_cpu_stall+0x10c8/0x1220 kernel/rcu/tree_stall.h:592
 check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0x831/0x1110 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x4fe/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lock_acquire+0x1f2/0x3f0 kernel/locking/lockdep.c:5627
Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f6 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 66 43 c7 44 3d 09 00 00 43 c6 44 3d 0b
RSP: 0000:ffffc90002fdf800 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: dc04c701b3fef000
RDX: 0000000000000000 RSI: ffffffff8a0b2460 RDI: ffffffff8a59a700
RBP: ffffc90002fdf920 R08: dffffc0000000000 R09: fffffbfff1ff361b
R10: fffffbfff1ff361b R11: 1ffffffff1ff361a R12: ffffffff8c1dd4e0
R13: 1ffff920005fbf0c R14: 0000000000000246 R15: dffffc0000000000
 __fs_reclaim_acquire mm/page_alloc.c:4580 [inline]
 fs_reclaim_acquire+0x6d/0x100 mm/page_alloc.c:4594
 prepare_alloc_pages+0x15a/0x5f0 mm/page_alloc.c:5237
 __alloc_pages+0x10e/0x470 mm/page_alloc.c:5455
 alloc_pages_vma+0x393/0x7c0 mm/mempolicy.c:2146
 wp_page_copy+0x235/0x1fd0 mm/memory.c:3056
 handle_pte_fault mm/memory.c:4668 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x1eca/0x43c0 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
 handle_page_fault arch/x86/mm/fault.c:1445 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f1667a33114
Code: 66 0f 1f 44 00 00 48 8b 38 8b 50 08 4c 01 ff 48 83 fa 26 74 0a 48 83 fa 08 0f 85 1b 0a 00 00 48 8b 50 10 48 83 c0 18 4c 01 fa <48> 89 17 48 39 d8 72 d4 4c 8b b1 e8 01 00 00 49 01 f0 4d 85 f6 0f
RSP: 002b:00007fff378052f0 EFLAGS: 00010202
RAX: 00007f16678cbb28 RBX: 00007f16678d6b68 RCX: 00007f1667b9e700
RDX: 00007f1667933020 RSI: 00007f166789e3c0 RDI: 00007f1667b92000
RBP: 00007f1667b9e700 R08: 0000000000038b98 R09: 00007f16678d6f58
R10: 0000000070000025 R11: 00007f166789e3a0 R12: 00007fff37805330
R13: 00007fff378054b8 R14: 00007fff37805450 R15: 00007f166789e000
 </TASK>