rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=6373, q=18 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294966932-4294956430), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g6373 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:25496 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17d3/0x4a20 kernel/sched/core.c:6736
 __schedule_loop kernel/sched/core.c:6813 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6828
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2572
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
 kthread+0x2f2/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </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: 5118 Comm: syz-executor348 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:check_preemption_disabled+0x67/0x120 lib/smp_processor_id.c:19
Code: 85 ce 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f e9 dc ea 0a 00 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 <74> c5 49 89 f6 49 89 ff 65 4c 8b 24 25 80 d0 03 00 41 f6 44 24 2f
RSP: 0018:ffffc90004447c50 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000000 RCX: 1ffff1100f45a8a2
RDX: 0000000000000000 RSI: ffffffff8baac1e0 RDI: ffffffff8bfed300
RBP: ffffc90004447d50 R08: ffffffff815c79e9 R09: 1ffffffff1f0e74d
R10: dffffc0000000000 R11: ffffffff813227a0 R12: ffff88801d874a00
R13: 1ffff92000888f98 R14: ffffffff8b7f091d R15: dffffc0000000000
FS:  00005555725c83c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 00000000221de000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lockdep_hardirqs_off+0x75/0x110 kernel/locking/lockdep.c:4460
 trace_hardirqs_off+0x12/0x40 kernel/trace/trace_preemptirq.c:87
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
 _raw_spin_lock_irq+0xad/0x120 kernel/locking/spinlock.c:170
 spin_lock_irq include/linux/spinlock.h:376 [inline]
 __set_current_blocked+0x11f/0x380 kernel/signal.c:3095
 __do_sys_rt_sigreturn+0x170/0x270 arch/x86/kernel/signal_64.c:261
 do_syscall_64+0xfd/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fd1f69b04c9
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007fff71126440 EFLAGS: 00000206 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd1f69b04c9
RDX: 00007fff71126440 RSI: 00007fff71126570 RDI: 0000000000000021
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00005555725c8370
R13: 0000000000000002 R14: 00007fff71126a40 R15: 00007fff71126a30
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.397 msecs