rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10504 jiffies, g=82957, q=677 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295021567-4295011065), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g82957 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:24816 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:2030
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2232
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </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: 3 Comm: pool_workqueue_ Not tainted 6.9.0-rc3-next-20240412-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0x5a/0xb0 kernel/rcu/tree.c:725
Code: f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 3c 2c 7f 00 48 c7 c3 c8 7c 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 22 8b 03 65 ff 0d 11 4b 87 7e 74 10 83 e0 04 c1 e8 02 5b
RSP: 0018:ffffc90000a18b20 EFLAGS: 00000806
RAX: 0000000000000000 RBX: ffff8880b9537cc8 RCX: ffffffff8172d390
RDX: 0000000000000000 RSI: ffffffff8c1fa740 RDI: ffffffff8c1fa700
RBP: ffffc90000a18c70 R08: ffffffff8fabe6af R09: 1ffffffff1f57cd5
R10: dffffc0000000000 R11: fffffbfff1f57cd6 R12: 1ffff92000143174
R13: ffffffff898e7954 R14: ffffffff8dd909e8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020004340 CR3: 000000006c894000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xbf/0x9f0 kernel/locking/lockdep.c:5765
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x9b4/0xca0 net/sched/sch_taprio.c:981
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x5a5/0xd50 kernel/time/hrtimer.c:1756
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:synchronize_rcu+0x0/0x360 kernel/rcu/tree.c:4006
Code: e1 07 80 c1 03 38 c1 0f 8c 97 fe ff ff 4c 89 f7 e8 55 fc 7e 00 e9 8a fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc90000087cb8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000010fa0 RCX: ffffffff9476b703
RDX: 0000777d58b56c01 RSI: ffffffff8bcadf80 RDI: ffffffff8c1fa760
RBP: ffffc90000087da0 R08: ffffffff81423c35 R09: 1ffffffff1f57cd5
R10: dffffc0000000000 R11: fffffbfff1f57cd6 R12: ffffffff9475ec68
R13: 1ffff92000010f9c R14: 0000000000000a06 R15: ffffc90000087d00
 lockdep_unregister_key+0x4b7/0x540 kernel/locking/lockdep.c:6475
 wq_unregister_lockdep kernel/workqueue.c:4767 [inline]
 pwq_release_workfn+0x6e0/0x840 kernel/workqueue.c:5070
 kthread_worker_fn+0x500/0xaf0 kernel/kthread.c:842
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>