rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=7601, q=6 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294966813-4294956312), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g7601 f0x2 RCU_GP_WAIT_FQS(5) ->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:27888 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5399 [inline]
 __schedule+0xf15/0x5c80 kernel/sched/core.c:6726
 __schedule_loop kernel/sched/core.c:6801 [inline]
 schedule+0xe7/0x270 kernel/sched/core.c:6816
 schedule_timeout+0x136/0x290 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1830
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5111 Comm: syz-executor261 Not tainted 6.7.0-rc5-next-20231215-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0xc3/0x530 kernel/locking/lockdep.c:5725
Code: 07 0f 87 e8 03 00 00 89 d5 be 08 00 00 00 48 89 e8 48 c1 e8 06 48 8d 3c c5 50 03 3a 8f e8 75 21 77 00 48 0f a3 2d ed 85 d1 0d <0f> 82 a9 03 00 00 48 c7 c0 18 37 3a 8f 48 ba 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000007e20 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 1ffff92000000fc6 RCX: ffffffff81687d5b
RDX: fffffbfff1e7406b RSI: 0000000000000008 RDI: ffffffff8f3a0350
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1e7406a
R10: ffffffff8f3a0357 R11: ffffc90000007ff8 R12: 0000000000000001
R13: 0000000000000000 R14: ffff8880b982b4d8 R15: 0000000000000000
FS:  0000555555bae3c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8ab4fed4c0 CR3: 00000000743c0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
 hrtimer_interrupt+0x10e/0x800 kernel/time/hrtimer.c:1795
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x10c/0x410 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
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 8b 74 24 08 48 89 fb 48 83 c7 18 e8 2a 31 d9 f6 48 89 df e8 f2 a8 d9 f6 e8 ad 8d ff f6 fb bf 01 00 00 00 <e8> 62 51 cb f6 65 8b 05 23 80 74 75 85 c0 74 02 5b c3 e8 70 44 71
RSP: 0018:ffffc90003d6fd00 EFLAGS: 00000206
RAX: 0000000003a9a6d1 RBX: ffff888025a95340 RCX: 1ffffffff1e73a19
RDX: 0000000000000000 RSI: ffffffff8accb4a0 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f3a0357 R11: 0000000000000000 R12: ffff888025a957d8
R13: 0000000000000021 R14: ffff888025a95740 R15: 1ffff920007adfaf
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1879/0x2770 kernel/signal.c:2896
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11e/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f8ab4fd4fb7
Code: 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 80 3d c1 a0 08 00 00 <74> 17 b8 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00
RSP: 002b:00007ffd25a3d7d8 EFLAGS: 00000246
RAX: 00000000ffffffff RBX: 000000000000000b RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000555555bae370
R13: 0000000000000004 R14: 00007ffd25a3d850 R15: 00007ffd25a3d840
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.488 msecs