[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts.
executing program
executing program
syzkaller login: [ 466.250845][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 466.257606][ C1] rcu: 1-...!: (1 GPs behind) idle=38d/1/0x4000000000000000 softirq=10159/10160 fqs=234
[ 466.267703][ C1] (t=10500 jiffies g=11181 q=11)
[ 466.272737][ C1] rcu: rcu_preempt kthread starved for 9849 jiffies! g11181 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
[ 466.283848][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[ 466.293844][ C1] rcu: RCU grace-period kthread stack dump:
[ 466.299736][ C1] task:rcu_preempt state:R running task stack:29304 pid: 14 ppid: 2 flags:0x00004000
[ 466.310541][ C1] Call Trace:
[ 466.313827][ C1]
[ 466.316771][ C1] __schedule+0xa9a/0x4940
[ 466.321323][ C1] ? lockdep_hardirqs_on+0x79/0x100
[ 466.326532][ C1] ? _raw_spin_unlock_irqrestore+0x3d/0x70
[ 466.332361][ C1] ? io_schedule_timeout+0x140/0x140
[ 466.337657][ C1] ? debug_object_destroy+0x210/0x210
[ 466.343124][ C1] schedule+0xd2/0x260
[ 466.347203][ C1] schedule_timeout+0x14a/0x2a0
[ 466.352066][ C1] ? usleep_range+0x170/0x170
[ 466.356752][ C1] ? destroy_timer_on_stack+0x20/0x20
[ 466.362390][ C1] ? xsk_destruct+0x20/0x140
[ 466.367140][ C1] ? _raw_spin_unlock_irqrestore+0x3d/0x70
[ 466.373046][ C1] ? prepare_to_swait_event+0xee/0x470
[ 466.378562][ C1] rcu_gp_fqs_loop+0x186/0x810
[ 466.383367][ C1] ? force_qs_rnp+0x760/0x760
[ 466.388058][ C1] ? rcu_gp_init+0x90b/0x12a0
[ 466.392754][ C1] rcu_gp_kthread+0x1de/0x320
[ 466.397442][ C1] ? rcu_gp_init+0x12a0/0x12a0
[ 466.402214][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 466.408531][ C1] ? __kthread_parkme+0x15f/0x220
[ 466.413593][ C1] ? rcu_gp_init+0x12a0/0x12a0
[ 466.418374][ C1] kthread+0x405/0x4f0
[ 466.422455][ C1] ? set_kthread_struct+0x130/0x130
[ 466.427666][ C1] ret_from_fork+0x1f/0x30
[ 466.432137][ C1]
[ 466.435187][ C1] rcu: Stack dump where RCU GP kthread last ran:
[ 466.441596][ C1] Sending NMI from CPU 1 to CPUs 0:
[ 466.446821][ C0] NMI backtrace for cpu 0
[ 466.446831][ C0] CPU: 0 PID: 2713 Comm: kworker/0:3 Not tainted 5.15.0-rc5-next-20211015-syzkaller #0
[ 466.446853][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 466.446867][ C0] Workqueue: events prog_array_map_clear_deferred
[ 466.446949][ C0] RIP: 0010:check_preemption_disabled+0x2/0x170
[ 466.446978][ C0] Code: 1f 44 00 00 e8 6f 16 4e f8 65 48 8b 3c 25 40 70 02 00 e8 41 43 05 f8 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 <41> 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 cd
[ 466.446997][ C0] RSP: 0018:ffffc9000b95fa68 EFLAGS: 00000046
[ 466.447012][ C0] RAX: 0000000000000002 RBX: c8757c4f6cfa24cc RCX: ffffc9000b95fac8
[ 466.447025][ C0] RDX: 1ffff110046b014b RSI: ffffffff89ac08c0 RDI: ffffffff8a046f60
[ 466.447039][ C0] RBP: 1ffff9200172bf51 R08: 0000000000000000 R09: 0000000000000000
[ 466.447051][ C0] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
[ 466.447063][ C0] R13: 0000000000000003 R14: ffff888023580a60 R15: ffff888023580000
[ 466.447077][ C0] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
[ 466.447096][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 466.447110][ C0] CR2: 00005555567352c0 CR3: 000000000b88e000 CR4: 00000000003506f0
[ 466.447123][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 466.447134][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 466.447147][ C0] Call Trace:
[ 466.447153][ C0]
[ 466.447159][ C0] lock_release+0x3bb/0x720
[ 466.447200][ C0] ? fd_array_map_delete_elem+0x1b0/0x2e0
[ 466.447222][ C0] ? lock_downgrade+0x6e0/0x6e0
[ 466.447243][ C0] ? __mutex_lock+0x21a/0x12f0
[ 466.447267][ C0] __mutex_unlock_slowpath+0x99/0x5e0
[ 466.447290][ C0] ? mutex_lock_io_nested+0x1150/0x1150
[ 466.447317][ C0] ? wait_for_completion_io+0x270/0x270
[ 466.447340][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 466.447365][ C0] ? prog_array_map_poke_run+0x77/0x6b0
[ 466.447389][ C0] fd_array_map_delete_elem+0x1b0/0x2e0
[ 466.447411][ C0] ? __sanitizer_cov_trace_pc+0x7/0x60
[ 466.447434][ C0] prog_array_map_clear_deferred+0x10b/0x1b0
[ 466.447457][ C0] ? array_map_free+0x1e0/0x1e0
[ 466.447481][ C0] process_one_work+0x9b2/0x1690
[ 466.447527][ C0] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 466.447553][ C0] ? rwlock_bug.part.0+0x90/0x90
[ 466.447574][ C0] ? _raw_spin_lock_irq+0x41/0x50
[ 466.447600][ C0] worker_thread+0x658/0x11f0
[ 466.447628][ C0] ? process_one_work+0x1690/0x1690
[ 466.447653][ C0] kthread+0x405/0x4f0
[ 466.447673][ C0] ? set_kthread_struct+0x130/0x130
[ 466.447696][ C0] ret_from_fork+0x1f/0x30
[ 466.447723][ C0]
[ 466.447818][ C1] NMI backtrace for cpu 1
[ 466.717360][ C1] CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 5.15.0-rc5-next-20211015-syzkaller #0
[ 466.726824][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 466.736881][ C1] Workqueue: events prog_array_map_clear_deferred
[ 466.743401][ C1] Call Trace:
[ 466.746679][ C1]
[ 466.749538][ C1] dump_stack_lvl+0xcd/0x134
[ 466.754215][ C1] nmi_cpu_backtrace.cold+0x47/0x144
[ 466.759514][ C1] ? lapic_can_unplug_cpu+0x80/0x80
[ 466.764780][ C1] nmi_trigger_cpumask_backtrace+0x1ae/0x220
[ 466.770826][ C1] rcu_dump_cpu_stacks+0x25e/0x3f0
[ 466.775958][ C1] rcu_sched_clock_irq.cold+0x9d/0x746
[ 466.781458][ C1] ? memcpy+0x39/0x60
[ 466.785528][ C1] ? memcpy+0x39/0x60
[ 466.789522][ C1] ? rcutree_dead_cpu+0x30/0x30
[ 466.794470][ C1] ? do_raw_spin_unlock+0x171/0x230
[ 466.799676][ C1] ? _raw_spin_unlock_irqrestore+0x3d/0x70
[ 466.805513][ C1] update_process_times+0x16d/0x200
[ 466.810721][ C1] tick_sched_handle+0x9b/0x180
[ 466.815653][ C1] tick_sched_timer+0x1b0/0x2d0
[ 466.820518][ C1] ? get_cpu_iowait_time_us+0x3f0/0x3f0
[ 466.826072][ C1] __hrtimer_run_queues+0x1c0/0xe50
[ 466.831284][ C1] ? hrtimer_sleeper_start_expires+0x80/0x80
[ 466.837271][ C1] ? ktime_get_update_offsets_now+0x3eb/0x5c0
[ 466.843356][ C1] hrtimer_interrupt+0x31c/0x790
[ 466.848316][ C1] __sysvec_apic_timer_interrupt+0x146/0x530
[ 466.854318][ C1] sysvec_apic_timer_interrupt+0x8e/0xc0
[ 466.859963][ C1]
[ 466.862893][ C1]
[ 466.865823][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 466.871810][ C1] RIP: 0010:lock_is_held_type+0xff/0x140
[ 466.877455][ C1] Code: 00 00 b8 ff ff ff ff 65 0f c1 05 0c 1a b5 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
[ 466.897153][ C1] RSP: 0018:ffffc90000ddfa30 EFLAGS: 00000296
[ 466.903316][ C1] RAX: 0000000000000046 RBX: 0000000000000003 RCX: 0000000000000001
[ 466.911287][ C1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
[ 466.919345][ C1] RBP: ffffffff8bb82de0 R08: 0000000000000000 R09: ffffffff8d8fd297
[ 466.927320][ C1] R10: fffffbfff1b1fa52 R11: 0000000000000000 R12: ffff8880157b0000
[ 466.935378][ C1] R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8880157b0ab8
[ 466.943379][ C1] rcu_read_lock_sched_held+0x3a/0x70
[ 466.948763][ C1] lock_release+0x522/0x720
[ 466.953278][ C1] ? fd_array_map_delete_elem+0x1b0/0x2e0
[ 466.959006][ C1] ? lock_downgrade+0x6e0/0x6e0
[ 466.963887][ C1] ? __mutex_lock+0x21a/0x12f0
[ 466.968672][ C1] __mutex_unlock_slowpath+0x99/0x5e0
[ 466.974066][ C1] ? mutex_lock_io_nested+0x1150/0x1150
[ 466.979621][ C1] ? kasan_check_range+0xde/0x180
[ 466.984652][ C1] ? wait_for_completion_io+0x270/0x270
[ 466.990294][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 466.996641][ C1] ? prog_array_map_poke_run+0x77/0x6b0
[ 467.002206][ C1] fd_array_map_delete_elem+0x1b0/0x2e0
[ 467.007757][ C1] ? fd_array_map_delete_elem+0x2/0x2e0
[ 467.013321][ C1] prog_array_map_clear_deferred+0x10b/0x1b0
[ 467.019314][ C1] ? array_map_free+0x1e0/0x1e0
[ 467.024181][ C1] process_one_work+0x9b2/0x1690
[ 467.029143][ C1] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 467.034539][ C1] ? rwlock_bug.part.0+0x90/0x90
[ 467.039492][ C1] ? _raw_spin_lock_irq+0x41/0x50
[ 467.044710][ C1] worker_thread+0x658/0x11f0
[ 467.049414][ C1] ? process_one_work+0x1690/0x1690
[ 467.054623][ C1] kthread+0x405/0x4f0
[ 467.058701][ C1] ? set_kthread_struct+0x130/0x130
[ 467.063921][ C1] ret_from_fork+0x1f/0x30
[ 467.068366][ C1]