rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P3634/1:b..l
	(detected by 1, t=10502 jiffies, g=23905, q=100 ncpus=2)
task:syz-executor    state:R  running task     stack:20376 pid:3634  ppid:3629   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6561
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6873
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:handle_mounts fs/namei.c:1530 [inline]
RIP: 0010:step_into+0xbc/0x1070 fs/namei.c:1836
Code: ff 49 c1 ef 03 4c 89 bc 24 98 00 00 00 41 0f b6 04 1f 84 c0 0f 85 f4 0b 00 00 4c 8d a4 24 d0 00 00 00 c6 84 24 c0 00 00 00 00 <4c> 89 e8 48 c1 e8 03 48 89 44 24 60 80 3c 18 00 74 08 4c 89 ef e8
RSP: 0018:ffffc90003ddf680 EFLAGS: 00000297
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffc90003ddf700
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffc90003ddfba0
RBP: ffffc90003ddf7d0 R08: ffffffff81f56db3 R09: ffffed100e4b640f
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90003ddf750
R13: ffffc90003ddfba0 R14: 1ffff920007bbee4 R15: 1ffff920007bbee8
 walk_component fs/namei.c:2004 [inline]
 link_path_walk+0x72c/0xee0 fs/namei.c:2325
 path_openat+0x23d/0x2e60 fs/namei.c:3781
 do_filp_open+0x230/0x480 fs/namei.c:3812
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1345
 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: 0033:0x7fdf2cb75cd0
RSP: 002b:00007fff44ec3770 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fdf2cb75cd0
RDX: 0000000000000002 RSI: 00007fff44ec3870 RDI: 00000000ffffff9c
RBP: 00007fff44ec3870 R08: 0000000000000000 R09: 00007fff44ec3537
R10: 0000000000000000 R11: 0000000000000293 R12: 0000555556aa65eb
R13: 0000555556aa6590 R14: 0000000000035652 R15: 00007fff44ec3870
 </TASK>
rcu: rcu_preempt kthread starved for 10538 jiffies! g23905 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:26752 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6561
 schedule+0xbf/0x180 kernel/sched/core.c:6637
 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:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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: 6c db f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 34 2b e2 f6 0f 1f 44 00 00 e8 6a 68 db f6 0f 00 2d b3 4d b8 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 bb f0 32 f7
RSP: 0018:ffffc90000177b80 EFLAGS: 000002d3
RAX: ffffffff8aaf3326 RBX: 0000000000000000 RCX: ffff888012b41dc0
RDX: 0000000000000000 RSI: ffffffff8b0c0240 RDI: ffffffff8b5d5ba0
RBP: ffffc90000177c10 R08: ffffffff8aaf3308 R09: ffffed10025683b9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200002ef70
R13: ffff888146ab1804 R14: ffffc90000177ba0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c351c04 CR3: 000000000d08e000 CR4: 00000000003506e0
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
 start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>
vkms_vblank_simulate: vblank timer overrun