rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (3 ticks this GP) idle=98dc/1/0x4000000000000000 softirq=7383/7383 fqs=3
rcu: 	(detected by 0, t=10502 jiffies, g=8437, q=321 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5168 Comm: dhcpcd Not tainted 6.6.0-syzkaller-15494-g6bc986ab839c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:hlock_class kernel/locking/lockdep.c:223 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3780 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3836 [inline]
RIP: 0010:__lock_acquire+0x180e/0x5de0 kernel/locking/lockdep.c:5136
Code: ff ff 41 be ff ff ff ff c7 44 24 48 ff ff ff ff c7 44 24 68 ff ff ff ff c7 44 24 78 01 00 00 00 e9 e1 f2 ff ff 41 0f b7 5d 20 <66> 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d
RSP: 0000:ffffc90002d2fb18 EFLAGS: 00000046
RAX: 0000000000040000 RBX: 0000000000004066 RCX: 0000000041266922
RDX: 1ffff1100d489c84 RSI: 000000004f807936 RDI: ffffffff91f265c0
RBP: 00000000ffe62747 R08: 0000000000000000 R09: fffffbfff23e41d1
R10: ffffffff91f20e8f R11: 0000000000000000 R12: ffff88806a44e422
R13: ffff88806a44e400 R14: 00000000ffffffff R15: 0000000000000002
FS:  00007f2b2627c740(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c0cf603000 CR3: 0000000029c10000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire kernel/locking/lockdep.c:5753 [inline]
 lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x2bd/0xc10 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x42/0xc0 arch/x86/kernel/apic/apic.c:1076
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0033:0x7f2b262f9272
Code: 31 e4 5a 4c 89 e0 5d 41 5c 41 5d 41 5e c3 48 85 ff 0f 84 83 00 00 00 41 54 4c 8d 67 f0 55 53 48 8b 1d 9a 7b 12 00 48 8b 47 f8 <64> 8b 2b a8 02 74 39 83 3d 48 7f 12 00 00 75 26 48 3b 05 07 7f 12
RSP: 002b:00007ffc7bc80e90 EFLAGS: 00000206
RAX: 0000000000000021 RBX: ffffffffffffff80 RCX: 000055c0cf5fa5a0
RDX: 000055c59353505a RSI: 0000000000000000 RDI: 000055c0cf5fa690
RBP: 0000000000000000 R08: 0000000000000007 R09: 8a087771756a5e84
R10: 0000000000000160 R11: 0000000000000007 R12: 000055c0cf5fa680
R13: 00007ffc7bc81558 R14: 0000000000000003 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 6982 jiffies! g8437 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=2501
rcu: rcu_preempt kthread starved for 6983 jiffies! g8437 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:28112 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xee2/0x59a0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe7/0x270 kernel/sched/core.c:6778
 schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1830
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>