rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=3a04/1/0x4000000000000000 softirq=73716/73721 fqs=0
rcu: 	(detected by 1, t=10505 jiffies, g=73433, q=450 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17211 Comm: syz.1.2846 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock+0x13e/0x2c0 kernel/locking/spinlock_debug.c:116
Code: 28 00 00 00 00 e8 c2 94 85 00 be 04 00 00 00 48 8d 7c 24 28 e8 b3 94 85 00 8b 44 24 28 ba 01 00 00 00 89 44 24 04 f0 0f b1 13 <0f> 85 95 00 00 00 65 44 8b 35 90 a3 8c 7e 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888056e702e8 RCX: ffffffff8177355d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007d10
RBP: 1ffff92000000f9e R08: 0000000000000001 R09: fffff52000000fa2
R10: 0000000000000003 R11: 0000000000000002 R12: ffff888056e702f0
R13: ffff888056e702f8 R14: ffff888056e70340 R15: ffffffff89416cb0
FS:  00007f4fc867e6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2abd8f CR3: 000000005bbbe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xd8/0xc60 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 46 61 4a f6 48 89 df e8 9e e0 4a f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 85 c5 3b f6 65 8b 05 f6 80 d7 74 85 c0 74 16 5b
RSP: 0018:ffffc9000c06fa20 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffffc9000c06fb18 RCX: 1ffffffff2dcb1bb
RDX: 0000000000000000 RSI: ffffffff8b6cd9e0 RDI: ffffffff8bd1ede0
RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff2dca39a
R10: ffffffff96e51cd7 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000246 R14: 0000000000000000 R15: ffff88807c4bb250
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 __wake_up_common_lock kernel/sched/wait.c:108 [inline]
 __wake_up+0x3f/0x60 kernel/sched/wait.c:127
 end_dir_add fs/dcache.c:2466 [inline]
 __d_add fs/dcache.c:2648 [inline]
 d_add+0x3a7/0x730 fs/dcache.c:2669
 simple_lookup fs/libfs.c:84 [inline]
 simple_lookup+0x127/0x180 fs/libfs.c:74
 __lookup_slow+0x24f/0x460 fs/namei.c:1791
 lookup_one_len+0x181/0x1b0 fs/namei.c:2905
 start_creating.part.0+0x12f/0x3a0 fs/debugfs/inode.c:378
 start_creating fs/debugfs/inode.c:351 [inline]
 __debugfs_create_file+0xa5/0x660 fs/debugfs/inode.c:423
 debugfs_create_file_full+0x6d/0xa0 fs/debugfs/inode.c:462
 kvm_create_vm_debugfs virt/kvm/kvm_main.c:1041 [inline]
 kvm_create_vm virt/kvm/kvm_main.c:1193 [inline]
 kvm_dev_ioctl_create_vm virt/kvm/kvm_main.c:5353 [inline]
 kvm_dev_ioctl+0x14b6/0x1aa0 virt/kvm/kvm_main.c:5395
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4fc7785d29
Code: 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 01 48
RSP: 002b:00007f4fc867e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4fc7975fa0 RCX: 00007f4fc7785d29
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004
RBP: 00007f4fc7801b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4fc7975fa0 R15: 00007ffeb61da898
 </TASK>
rcu: rcu_preempt kthread starved for 10505 jiffies! g73433 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:27600 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 d8 e4 d9 74 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 68 91 b3 00 fb f4 <fa> c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d58 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8b29d759
RDX: 0000000000000001 RSI: ffff888143eea800 RDI: ffff888143eea864
RBP: ffff888143eea864 R08: 0000000000000001 R09: ffffed10170e6fed
R10: ffff8880b8737f6b R11: 0000000000000000 R12: ffff88801ef72000
R13: ffffffff8ee16a20 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe532577bac CR3: 000000006695e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:699
 cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:268
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:389
 cpuidle_idle_call kernel/sched/idle.c:230 [inline]
 do_idle+0x310/0x3f0 kernel/sched/idle.c:325
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
 start_secondary+0x222/0x2b0 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13e/0x148
 </TASK>