rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=914c/1/0x4000000000000000 softirq=18933/18933 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=15509, q=996 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 3 Comm: pool_workqueue_ Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:kasan_check_range+0x5/0x290 mm/kasan/generic.c:188
Code: 8e e8 2f 88 e1 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 <41> 57 41 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37
RSP: 0018:ffffc90000a18a40 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 000000000000006c RCX: ffffffff817aaccc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942b8888
RBP: 00000000000c406c R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff203910f R12: ffff88801beec6c4
R13: 0000000000000000 R14: 000000000000006c R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f24971e950 CR3: 000000006fe5a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class kernel/locking/lockdep.c:228 [inline]
 check_wait_context kernel/locking/lockdep.c:4850 [inline]
 __lock_acquire+0x4ac/0x2100 kernel/locking/lockdep.c:5176
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1743 [inline]
 __hrtimer_run_queues+0x670/0xd50 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+0x110/0x420 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:lockdep_unregister_key+0x56d/0x610 kernel/locking/lockdep.c:6593
Code: 26 94 48 c7 c6 c0 f8 7a 81 e8 8f 24 0a 00 e8 fa 38 0a 00 e9 e5 fb ff ff e8 80 27 49 0a 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 90 0f 0b 90 45 31 f6 e9 62 ff ff ff 90 0f 0b 90 e9 a1
RSP: 0018:ffffc90000087cc0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92000010fa0 RCX: ffffffff9a3bf903
RDX: 0000000000000001 RSI: ffffffff8c0ae5c0 RDI: ffffffff8c605b60
RBP: ffffc90000087d98 R08: ffffffff9428a5ef R09: 1ffffffff28514bd
R10: dffffc0000000000 R11: fffffbfff28514be R12: ffffc90000087d00
R13: 1ffff92000010f9c R14: 0000000000000000 R15: 0000000000000206
 wq_unregister_lockdep kernel/workqueue.c:4789 [inline]
 pwq_release_workfn+0x6d1/0x800 kernel/workqueue.c:5085
 kthread_worker_fn+0x500/0xb70 kernel/kthread.c:844
 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: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g15509 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=6654
rcu: rcu_preempt kthread starved for 10502 jiffies! g15509 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:25976 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6753
 __schedule_loop kernel/sched/core.c:6830 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6845
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 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>