rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=b84c/1/0x4000000000000000 softirq=205396/205396 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=181697, q=168 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 937 Comm: syz.8.7141 Not tainted 6.16.0-rc2-syzkaller-00278-g3f75bfff44be #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:mark_usage kernel/locking/lockdep.c:4623 [inline]
RIP: 0010:__lock_acquire+0x5e7/0xd20 kernel/locking/lockdep.c:5194
Code: 00 00 0f 8c fc fe ff ff 44 89 e0 41 38 c5 76 1a e8 ae ca 18 03 48 8b 3c 24 85 c0 74 0d 83 3d d3 d9 01 0e 00 0f 84 1a 05 00 00 <83> 7c 24 0c 00 0f 84 a9 00 00 00 41 8b 46 20 66 85 c0 0f 88 8d 00
RSP: 0018:ffffc90000a08b70 EFLAGS: 00000046
RAX: 00000000ffffff02 RBX: 0000000000000002 RCX: 00000000ffffffff
RDX: 0000000000000002 RSI: 0000000000004000 RDI: ffff888025691e00
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81ae70c2
R10: dffffc0000000000 R11: fffffbfff1f3fc5f R12: ffffffffffffff02
R13: 0000000000000002 R14: ffff8880256928f0 R15: 0000000000000000
FS:  00007fdafceac6c0(0000) GS:ffff888125d83000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdafcea9f70 CR3: 0000000063a10000 CR4: 00000000003526f0
DR0: 000000000000634b DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0xa2/0xf0 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1765 [inline]
 __hrtimer_run_queues+0x602/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 db 1b 66 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 73 07 2f f6 65 8b 05 6c 04 38 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900048cfaa0 EFLAGS: 00000206
RAX: 150e5a6d16d64000 RBX: 0000000000000a02 RCX: 150e5a6d16d64000
RDX: 0000000000000000 RSI: ffffffff8d96ecf2 RDI: 0000000000000001
RBP: ffffc900048cfb28 R08: ffffffff8f9fe2f7 R09: 1ffffffff1f3fc5e
R10: dffffc0000000000 R11: fffffbfff1f3fc5f R12: dffffc0000000000
R13: 1ffff110170c758e R14: ffff888034aec610 R15: 1ffff92000919f54
 class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:557 [inline]
 try_to_wake_up+0x7b6/0x1290 kernel/sched/core.c:4226
 wake_up_process kernel/sched/core.c:4475 [inline]
 wake_up_q+0xb6/0x110 kernel/sched/core.c:1081
 futex_wake+0x4a0/0x560 kernel/futex/waitwake.c:198
 do_futex+0x395/0x420 kernel/futex/syscalls.c:107
 __do_sys_futex kernel/futex/syscalls.c:179 [inline]
 __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdafbf8e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdafceac0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fdafc1b5fa8 RCX: 00007fdafbf8e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fdafc1b5fac
RBP: 00007fdafc1b5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fdafc1b5fac
R13: 0000000000000000 R14: 00007fffa1f0ba00 R15: 00007fffa1f0bae8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g181697 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=205425
rcu: rcu_preempt kthread starved for 10502 jiffies! g181697 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:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>