rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=bc94/0/0x1 softirq=51253/51253 fqs=0
	(t=10500 jiffies g=73553 q=66 ncpus=2)
rcu: rcu_preempt kthread starved for 10500 jiffies! g73553 f0x0 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: 9124 Comm: syz.0.650 Not tainted 6.1.117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:fpregs_mark_activate+0x5d/0x80 arch/x86/kernel/fpu/core.c:782
Code: 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1f 41 89 ae 00 19 00 00 4c 89 f7 be 08 00 00 00 e8 89 82 af 00 f0 41 80 66 01 bf <5b> 41 5e 5d c3 89 d9 80 e1 07 80 c1 03 38 c1 7c d5 48 89 df e8 2a
RSP: 0018:ffffc900035afa80 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff88807e229900 RCX: ffffffff81329377
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88807e228000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed100fc45001
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88807e228000 R15: 1ffff1100fc452ee
FS:  00007fa4f52dc6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000061d1a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 fpu__restore_sig+0xa30/0x1300 arch/x86/kernel/fpu/signal.c:493
 restore_sigcontext+0x633/0x700 arch/x86/kernel/signal.c:140
 __do_sys_rt_sigreturn+0x190/0x250 arch/x86/kernel/signal.c:675
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa4f457e717
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007fa4f52dc0e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fa4f4735f88 RCX: 00007fa4f457e719
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa4f4735f88
RBP: 00007fa4f4735f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa4f4735f8c
R13: 0000000000000000 R14: 00007ffe2dfd7240 R15: 00007ffe2dfd7328
 </TASK>
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:567
Code: c1 d8 f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 64 7e df f6 0f 1f 44 00 00 e8 da bd d8 f6 0f 00 2d 23 d9 b5 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 ab 46 30 f7
RSP: 0018:ffffffff8d007b20 EFLAGS: 000002d3
RAX: ffffffff8ab1ce16 RBX: 0000000000000000 RCX: ffffffff8d0bd800
RDX: 0000000000000000 RSI: ffffffff8b0c01c0 RDI: ffffffff8b5d7800
RBP: ffffffff8d007bb0 R08: ffffffff8ab1cdf8 R09: fffffbfff1a17b01
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1a00f64
R13: ffff8881472fa004 R14: ffffffff8d007b40 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43fd4373b0 CR3: 000000007dadf000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:704
 cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3ce/0x680 kernel/sched/idle.c:303
 cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401
 rest_init+0x2da/0x300 init/main.c:733
 arch_call_rest_init+0xa/0xa init/main.c:893
 start_kernel+0x496/0x53f init/main.c:1140
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>