rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=7897, q=14 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294965363-4294954862), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g7897 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:24616 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x196c/0x4af0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 schedule_timeout+0x1bd/0x300 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1613
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1812
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </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: 5080 Comm: syz-executor638 Not tainted 6.6.0-rc7-syzkaller-00151-g56567a20b22b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:__lock_acquire+0x423/0x7f70 kernel/locking/lockdep.c:5071
Code: b8 00 00 00 00 00 fc ff df 48 8b 74 24 60 4c 89 3b 4c 8b 7c 24 38 49 8d 5c f7 10 48 89 d8 48 c1 e8 03 48 89 84 24 08 01 00 00 <42> 80 3c 00 00 74 1a 48 89 df e8 ae bd 7b 00 45 89 e9 49 b8 00 00
RSP: 0018:ffffc900001f0800 EFLAGS: 00000802
RAX: 1ffff110041ab15b RBX: ffff888020d58ad8 RCX: 000000000000069e
RDX: ffff888075fe6000 RSI: 0000000000000000 RDI: ffff888075fe6038
RBP: ffffc900001f0ac8 R08: dffffc0000000000 R09: 000000000000069e
R10: dffffc0000000000 R11: fffffbfff1d32d8e R12: ffff888020d58000
R13: 000000000000069e R14: 0000000000000000 R15: ffff888020d58ac8
FS:  0000555556fa43c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000074338000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5753
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 posix_timer_fn+0x33/0x390 kernel/time/posix-timers.c:318
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x59f/0xd10 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
 __sysvec_apic_timer_interrupt+0x104/0x390 arch/x86/kernel/apic/apic.c:1080
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1074
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
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: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3a d6 96 f6 48 89 df e8 42 c6 97 f6 e8 3d 3b be f6 fb bf 01 00 00 00 <e8> 62 cc 89 f6 65 8b 05 53 04 2d 75 85 c0 74 02 5b c3 e8 f0 d1 29
RSP: 0018:ffffc90003befc50 EFLAGS: 00000282
RAX: b8c9b1b7303f2300 RBX: ffff88802778ca00 RCX: ffffffff91edc303
RDX: dffffc0000000000 RSI: ffffffff8b0aa520 RDI: 0000000000000001
RBP: ffffc90003befd90 R08: ffffffff8e996c6f R09: 1ffffffff1d32d8d
R10: dffffc0000000000 R11: fffffbfff1d32d8e R12: 1ffff11004ef19d3
R13: 000000001c000004 R14: 0000000000000021 R15: ffff88802778ce98
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x155d/0x1840 kernel/signal.c:2895
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f873defce79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff10c32d28 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f873defce79
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000555556fa4370
R13: 0000000000000002 R14: 00007fff10c32da0 R15: 00007fff10c32d90
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.759 msecs
sched: RT throttling activated