rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=7093, q=12 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294980047-4294969545), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g7093 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:23920 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_timeout+0x1bd/0x300 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x30a/0x1500 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1830
 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:242
 </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: 5115 Comm: syz-executor148 Not tainted 6.7.0-rc3-syzkaller-00033-g3b47bc037bd4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:user_mode arch/x86/include/asm/ptrace.h:136 [inline]
RIP: 0010:irqentry_enter+0x0/0x60 kernel/entry/common.c:320
Code: e8 e5 c4 ff ff 48 8b 3c 24 e9 8c f1 ff ff f3 0f 1e fa bf 02 00 00 00 e8 be 0a 00 00 eb d5 66 2e 0f 1f 84 00 00 00 00 00 66 90 <66> 0f 1f 00 53 f6 87 88 00 00 00 03 74 07 e8 cd fe ff ff eb 24 65
RSP: 0018:ffffc900044dfb88 EFLAGS: 00000083
RAX: ffffc900044dfba8 RBX: ffffc900044dfba8 RCX: ffffffff8b4015be
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900044dfba8
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00005555557023c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000076eee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1076
 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 fa d5 4b f6 48 89 df e8 f2 10 4d f6 e8 ad e5 73 f6 fb bf 01 00 00 00 <e8> 12 36 3f f6 65 8b 05 d3 43 e2 74 85 c0 74 02 5b c3 e8 a0 11 df
RSP: 0018:ffffc900044dfc50 EFLAGS: 00000282
RAX: 43b10b8a343cc300 RBX: ffff88802565e5c0 RCX: ffffffff925cc303
RDX: dffffc0000000000 RSI: ffffffff8b6aade0 RDI: 0000000000000001
RBP: ffffc900044dfd90 R08: ffffffff8f00b8af R09: 1ffffffff1e01715
R10: dffffc0000000000 R11: fffffbfff1e01716 R12: 1ffff11004acbd4b
R13: 000000001c000004 R14: 0000000000000021 R15: ffff88802565ea58
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1569/0x1840 kernel/signal.c:2907
 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+0xb1/0x150 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
 do_syscall_64+0x52/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa7e08a0fea
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 c3 64 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 23 65 02 00 8b 44 24
RSP: 002b:00007ffff79f30d0 EFLAGS: 00000293
RAX: fffffffffffffff7 RBX: 0000000000000004 RCX: 00007fa7e08a0fea
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000555555702370
R13: 0000000000000005 R14: 00007ffff79f3160 R15: 00007ffff79f3150
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.274 msecs