rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4436/1:b..l
	(detected by 0, t=10502 jiffies, g=5757, q=354 ncpus=2)
task:kworker/u4:6    state:R  running task     stack:0     pid:4436  ppid:2      flags:0x00000008
Workqueue: events_power_efficient gc_worker
Call trace:
 __switch_to+0x308/0x598 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0xef4/0x1d44 kernel/sched/core.c:6561
 preempt_schedule_irq+0x8c/0x1b8 kernel/sched/core.c:6873
 arm64_preempt_schedule_irq arch/arm64/kernel/entry-common.c:265 [inline]
 __el1_irq arch/arm64/kernel/entry-common.c:474 [inline]
 el1_interrupt+0x4c/0x68 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
 nf_conntrack_get_ht+0x128/0x20c include/net/netfilter/nf_conntrack.h:343
 gc_worker+0x2d4/0x1260 net/netfilter/nf_conntrack_core.c:1503
 process_one_work+0x804/0x1484 kernel/workqueue.c:2292
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
rcu: rcu_preempt kthread starved for 10502 jiffies! g5757 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:0     pid:16    ppid:2      flags:0x00000008
Call trace:
 __switch_to+0x308/0x598 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0xef4/0x1d44 kernel/sched/core.c:6561
 schedule+0xc4/0x170 kernel/sched/core.c:6637
 schedule_timeout+0x1d8/0x344 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2cc/0x1538 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xc0/0x308 kernel/rcu/tree.c:1905
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 4452 Comm: syz.2.18 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : should_resched arch/arm64/include/asm/preempt.h:79 [inline]
pc : __local_bh_enable_ip+0x238/0x470 kernel/softirq.c:410
lr : __local_bh_enable_ip+0x230/0x470 kernel/softirq.c:408
sp : ffff800021917a60
x29: ffff800021917a70 x28: 0000000000000001 x27: ffff0000d7748000
x26: ffff800021917fb0 x25: ffff800021917d60 x24: 0000000000000001
x23: 1fffe0001aee9001 x22: dfff800000000000 x21: ffff800008030168
x20: ffff0001b3cd5900 x19: ffff0000d7748008 x18: 1fffe0001a12344c
x17: 0000000000000000 x16: ffff800008302888 x15: 0000000000000000
x14: 00000000fffffffe x13: ffff0000d7748000 x12: 0000000000000003
x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff80000ab87068
x8 : 00000000000000e0 x7 : 0000000018000004 x6 : 0000ffff7ed807d0
x5 : ffff800021917d80 x4 : ffff0000ca2004b8 x3 : 0000000000000000
x2 : ffff800021917980 x1 : ffff80001248d5c0 x0 : ffff80019e26e000
Call trace:
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline]
 __local_bh_enable_ip+0x238/0x470 kernel/softirq.c:408
 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33
 put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:274 [inline]
 fpsimd_preserve_current_state+0xd0/0x1c0 arch/arm64/kernel/fpsimd.c:1631
 fpsimd_signal_preserve_current_state+0x30/0x1b8 arch/arm64/kernel/fpsimd.c:1641
 setup_rt_frame arch/arm64/kernel/signal.c:964 [inline]
 handle_signal arch/arm64/kernel/signal.c:1016 [inline]
 do_signal arch/arm64/kernel/signal.c:1091 [inline]
 do_notify_resume+0x6cc/0x2cb8 arch/arm64/kernel/signal.c:1129
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585