rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (3 ticks this GP) idle=2694/1/0x4000000000000000 softirq=79977/79977 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=76849, q=269 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17 Comm: rcu_preempt Not tainted 6.13.0-rc2-syzkaller-00382-gdccbe2047a5b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0xa2/0x360 kernel/locking/lockdep.c:4727
Code: 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 18 2a 94 be 08 00 00 00 e8 b6 b7 8a 00 48 0f a3 1d 1e f1 ae 12 <73> 10 48 69 c3 c8 00 00 00 48 8d 98 40 97 c1 93 eb 68 48 c7 c0 c0
RSP: 0018:ffffc900000079c8 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000dca RCX: ffffffff817b275a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942a1a38
RBP: 0000000000000000 R08: ffffffff942a1a3f R09: 1ffffffff2854347
R10: dffffc0000000000 R11: fffffbfff2854348 R12: ffff88801ce90ac4
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88801ce90ae0
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f471f9a16c0 CR3: 000000000e736000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 mark_usage kernel/locking/lockdep.c:4635 [inline]
 __lock_acquire+0xbc3/0x2100 kernel/locking/lockdep.c:5180
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59d/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 6a aa af f5 48 89 df e8 a2 f1 b0 f5 e8 2d 12 dc f5 fb bf 01 00 00 00 <e8> b2 56 a2 f5 65 8b 05 53 aa 38 74 85 c0 74 06 5b e9 4c 15 25 00
RSP: 0018:ffffc90000167cd0 EFLAGS: 00000286
RAX: 616dc030ceb39c00 RBX: ffffffff8e93c880 RCX: ffffffff9a3a8903
RDX: dffffc0000000000 RSI: ffffffff8c0a9760 RDI: 0000000000000001
RBP: ffffc90000167df0 R08: ffffffff90197977 R09: 1ffffffff2032f2e
R10: dffffc0000000000 R11: fffffbfff2032f2f R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8e93c8c0 R15: ffffffff8e93c880
 rcu_gp_init+0x118c/0x1630 kernel/rcu/tree.c:1939
 rcu_gp_kthread+0x187/0x3b0 kernel/rcu/tree.c:2237
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g76849 f0x0 RCU_GP_INIT(4) ->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:26264 pid:17    tgid:17    ppid:2      flags:0x00004008
Call Trace:
 <TASK>
 </TASK>