rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=6937, q=70 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294956127-4294945625), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g6937 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:26712 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </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: 4272 Comm: syz-executor347 Tainted: G        W          6.1.122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_preemption_disabled+0x2/0x110 lib/smp_processor_id.c:13
Code: 3c 8d 48 89 de e8 8e 2a bd f9 e9 6d ff ff ff cc cc cc cc cc cc cc cc cc 48 c7 c7 60 67 5e 8b 48 c7 c6 a0 67 5e 8b eb 00 41 57 <41> 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc90003d87878 EFLAGS: 00000046
RAX: 0000000080000200 RBX: ffffffff815444e2 RCX: ffff88807f0f8000
RDX: 0000000000000000 RSI: ffffffff8b0c0360 RDI: ffffffff8b5e67c0
RBP: ffffc90003d87970 R08: ffffffff81333bc0 R09: ffffed100fe1f001
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff920007b0f20 R14: ffffffff815444e2 R15: 0000000000000200
FS:  0000555573609480(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa69361d33 CR3: 00000000308d3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lockdep_hardirqs_off+0xa4/0x100 kernel/locking/lockdep.c:4400
 trace_hardirqs_off+0xe/0x40 kernel/trace/trace_preemptirq.c:76
 __local_bh_enable_ip+0x102/0x1f0 kernel/softirq.c:378
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 fpregs_unlock arch/x86/include/asm/fpu/api.h:80 [inline]
 copy_fpstate_to_sigframe+0x54d/0xda0 arch/x86/kernel/fpu/signal.c:233
 get_sigframe+0x378/0x4b0 arch/x86/kernel/signal.c:297
 __setup_rt_frame arch/x86/kernel/signal.c:472 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
 handle_signal arch/x86/kernel/signal.c:828 [inline]
 arch_do_signal_or_restart+0x4ef/0x1a10 arch/x86/kernel/signal.c:873
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ffa692c0340
Code: ff e8 64 ff ff ff c6 05 7d 00 0c 00 01 5d c3 0f 1f 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa e9 77 ff ff ff 0f 1f 80 00 00 00 00 <48> 83 ec 08 64 8b 04 25 ac ff ff ff 85 c0 75 40 48 8b 46 10 64 8b
RSP: 002b:00007fff9b3a65f8 EFLAGS: 00000283
RAX: 0000000000000000 RBX: 00007fff9b3a7110 RCX: 00007ffa6937afc0
RDX: 00007fff9b3a6600 RSI: 00007fff9b3a6730 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000073
R13: 00007fff9b3a7290 R14: 9999999999999999 R15: 0000000000000000
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.429 msecs