Warning: Permanently added '10.128.0.109' (ED25519) to the list of known hosts.
executing program
[ 145.397196][ C0] sched: RT throttling activated
executing program
executing program
executing program
executing program
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executing program
[ 255.397166][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 255.404253][ C0] rcu: (detected by 0, t=10502 jiffies, g=8537, q=65 ncpus=2)
[ 255.411831][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294962619-4294952117), jiffies_till_next_fqs=1, root ->qsmask 0x0
[ 255.425311][ C0] rcu: rcu_preempt kthread starved for 10502 jiffies! g8537 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
[ 255.436440][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[ 255.446434][ C0] rcu: RCU grace-period kthread stack dump:
[ 255.452342][ C0] task:rcu_preempt state:R running task stack:27376 pid:17 ppid:2 flags:0x00004000
[ 255.463181][ C0] Call Trace:
[ 255.466572][ C0]
[ 255.469539][ C0] __schedule+0x14d2/0x44d0
[ 255.474123][ C0] ? _raw_spin_lock_bh+0x30/0x50
[ 255.479096][ C0] ? _raw_spin_unlock_irqrestore+0xae/0x110
[ 255.485112][ C0] ? asan.module_dtor+0x20/0x20
[ 255.489996][ C0] ? enqueue_timer+0x225/0x530
[ 255.494886][ C0] ? __mod_timer+0x984/0xdb0
[ 255.499522][ C0] schedule+0xbd/0x170
[ 255.503624][ C0] schedule_timeout+0x160/0x280
[ 255.508509][ C0] ? console_conditional_schedule+0x40/0x40
[ 255.514429][ C0] ? update_process_times+0x1b0/0x1b0
[ 255.519846][ C0] ? prepare_to_swait_event+0x339/0x360
[ 255.525446][ C0] rcu_gp_fqs_loop+0x302/0x1560
[ 255.530337][ C0] ? rcu_gp_init+0x110e/0x1510
[ 255.535229][ C0] ? rcu_gp_kthread+0x380/0x380
[ 255.540226][ C0] ? _raw_spin_unlock_irqrestore+0x86/0x110
[ 255.546248][ C0] ? lockdep_hardirqs_on+0x98/0x150
[ 255.551573][ C0] ? rcu_gp_init+0x1510/0x1510
[ 255.556544][ C0] ? _raw_spin_unlock_irqrestore+0xae/0x110
[ 255.562559][ C0] ? finish_swait+0xc7/0x1d0
[ 255.567178][ C0] rcu_gp_kthread+0x99/0x380
[ 255.571812][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0
[ 255.576964][ C0] ? __kthread_parkme+0x7a/0x1c0
[ 255.582025][ C0] ? __kthread_parkme+0x162/0x1c0
[ 255.587088][ C0] kthread+0x2fa/0x390
[ 255.591177][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0
[ 255.596323][ C0] ? kthread_blkcg+0xd0/0xd0
[ 255.600935][ C0] ret_from_fork+0x48/0x80
[ 255.605377][ C0] ? kthread_blkcg+0xd0/0xd0
[ 255.609993][ C0] ret_from_fork_asm+0x11/0x20
[ 255.614801][ C0]
[ 255.617841][ C0] rcu: Stack dump where RCU GP kthread last ran:
[ 255.624182][ C0] Sending NMI from CPU 0 to CPUs 1:
[ 255.629425][ C1] NMI backtrace for cpu 1
[ 255.629433][ C1] CPU: 1 PID: 5836 Comm: vhost-5834 Not tainted syzkaller #0
[ 255.629447][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[ 255.629455][ C1] RIP: 0010:lock_is_held_type+0x65/0x190
[ 255.629473][ C1] Code: 0f 85 f4 00 00 00 65 48 8b 1d 47 75 94 75 83 bb dc 0a 00 00 00 0f 85 df 00 00 00 41 89 f7 49 89 fe 48 c7 04 24 00 00 00 00 9c <8f> 04 24 4c 8b 2c 24 fa 48 c7 c7 c0 c9 aa 8a e8 47 13 00 00 65 ff
[ 255.629484][ C1] RSP: 0018:ffffc900046ef1f0 EFLAGS: 00000246
[ 255.629499][ C1] RAX: 0000000000000000 RBX: ffff888024998000 RCX: ffff888024998000
[ 255.629510][ C1] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880236627a0
[ 255.629519][ C1] RBP: 00000000ffffffff R08: ffff888024998000 R09: 0000000000000003
[ 255.629528][ C1] R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
[ 255.629536][ C1] R13: 00001fffffffefff R14: ffff8880236627a0 R15: 00000000ffffffff
[ 255.629547][ C1] FS: 0000555590f3b380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
[ 255.629560][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 255.629570][ C1] CR2: 0000000000000002 CR3: 000000007b57d000 CR4: 00000000003506e0
[ 255.629584][ C1] Call Trace:
[ 255.629591][ C1]
[ 255.629599][ C1] mtree_range_walk+0x4d2/0x7c0
[ 255.629628][ C1] ? mt_find+0x13e/0x5b0
[ 255.629646][ C1] mt_find+0x22b/0x5b0
[ 255.629664][ C1] ? mtree_destroy+0x30/0x30
[ 255.629687][ C1] find_vma+0x12e/0x1b0
[ 255.629704][ C1] ? generic_get_unmapped_area_topdown+0x660/0x660
[ 255.629726][ C1] __get_user_pages+0x37a/0x1470
[ 255.629752][ C1] ? populate_vma_page_range+0x370/0x370
[ 255.629769][ C1] ? __gup_longterm_locked+0x20e8/0x2b80
[ 255.629786][ C1] ? down_read_killable+0x1d0/0x340
[ 255.629801][ C1] __gup_longterm_locked+0x2247/0x2b80
[ 255.629828][ C1] ? pin_user_pages_remote+0x210/0x210
[ 255.629843][ C1] ? mark_lock+0x94/0x320
[ 255.629859][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x760
[ 255.629875][ C1] ? lock_chain_count+0x20/0x20
[ 255.629889][ C1] ? sanity_check_pinned_pages+0x1374/0x1500
[ 255.629906][ C1] ? internal_get_user_pages_fast+0x1fa2/0x2730
[ 255.629925][ C1] internal_get_user_pages_fast+0x217f/0x2730
[ 255.629943][ C1] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 255.629964][ C1] ? __asan_memset+0x22/0x40
[ 255.629985][ C1] ? mark_lock+0x94/0x320
[ 255.630001][ C1] ? get_user_pages_fast_only+0xa0/0xa0
[ 255.630018][ C1] ? lock_chain_count+0x20/0x20
[ 255.630030][ C1] ? try_to_wake_up+0x724/0x1140
[ 255.630051][ C1] ? _raw_spin_unlock_irqrestore+0x86/0x110
[ 255.630066][ C1] ? lockdep_hardirqs_on+0x98/0x150
[ 255.630079][ C1] ? pin_user_pages_fast+0x89/0xe0
[ 255.630096][ C1] log_write+0xc4/0x350
[ 255.630111][ C1] ? vhost_poll_wakeup+0xb8/0x130
[ 255.630125][ C1] ? vhost_log_write+0x500/0x500
[ 255.630138][ C1] ? log_used+0x342/0x3f0
[ 255.630155][ C1] vhost_update_used_flags+0x1c3/0x290
[ 255.630171][ C1] vhost_enable_notify+0xb7/0x810
[ 255.630187][ C1] vhost_vsock_handle_tx_kick+0x2d6/0xdb0
[ 255.630216][ C1] ? vhost_vsock_dev_release+0x3f0/0x3f0
[ 255.630234][ C1] ? __rwlock_init+0x150/0x150
[ 255.630253][ C1] ? lockdep_hardirqs_on+0x98/0x150
[ 255.630270][ C1] vhost_run_work_list+0x13d/0x1b0
[ 255.630285][ C1] ? __vhost_worker_flush+0x240/0x240
[ 255.630300][ C1] vhost_task_fn+0x25a/0x3c0
[ 255.630312][ C1] ? vhost_task_create+0x310/0x310
[ 255.630328][ C1] ? vhost_task_create+0x310/0x310
[ 255.630341][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x760
[ 255.630357][ C1] ? lock_chain_count+0x20/0x20
[ 255.630372][ C1] ? _raw_spin_unlock_irq+0x23/0x50
[ 255.630386][ C1] ? lockdep_hardirqs_on+0x98/0x150
[ 255.630400][ C1] ? vhost_task_create+0x310/0x310
[ 255.630412][ C1] ret_from_fork+0x48/0x80
[ 255.630427][ C1] ? vhost_task_create+0x310/0x310
[ 255.630440][ C1] ret_from_fork_asm+0x11/0x20
[ 255.630463][ C1]
[ 255.630469][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.044 msecs