INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-kasan-gce-386-0,10.128.15.208' (ECDSA) to the list of known hosts. 2017/11/06 15:38:37 parsed 1 programs 2017/11/06 15:38:37 executed programs: 0 syzkaller login: [ 63.740363] BUG: looking up invalid subclass: 8 [ 63.741182] turning off the locking correctness validator. [ 63.741941] CPU: 0 PID: 3000 Comm: syz-executor0 Not tainted 4.14.0-rc8+ #74 [ 63.742883] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.744115] Call Trace: [ 63.744479] dump_stack+0x194/0x257 [ 63.744967] ? arch_local_irq_restore+0x53/0x53 [ 63.745593] register_lock_class+0x5f2/0x2c70 [ 63.746211] ? lock_pin_lock+0x360/0x360 [ 63.746757] ? noop_count+0x40/0x40 [ 63.747243] ? trace_hardirqs_off+0x10/0x10 [ 63.747823] ? __is_insn_slot_addr+0x1fc/0x330 [ 63.748468] ? lock_release+0xa40/0xa40 [ 63.749034] ? __is_insn_slot_addr+0x1fc/0x330 [ 63.751069] ? check_usage+0x23d/0xb70 [ 63.751610] ? lock_release+0xa40/0xa40 [ 63.752151] ? print_irqtrace_events+0x270/0x270 [ 63.752813] ? is_bpf_text_address+0x7b/0x120 [ 63.753430] ? is_bpf_text_address+0x7b/0x120 [ 63.754028] ? __bfs+0xaa/0x750 [ 63.754475] ? lockdep_on+0x50/0x50 [ 63.754963] ? trace_hardirqs_off+0x10/0x10 [ 63.755580] ? rcutorture_record_progress+0x10/0x10 [ 63.756267] ? print_irqtrace_events+0x270/0x270 [ 63.756917] ? is_bpf_text_address+0xa4/0x120 [ 63.757561] ? hlock_class+0x140/0x140 [ 63.758095] __lock_acquire+0x224/0x3d50 [ 63.758642] ? __lock_acquire+0x6aa/0x3d50 [ 63.759209] ? print_irqtrace_events+0x270/0x270 [ 63.759845] ? snd_seq_deliver_event+0x27f/0x790 [ 63.760491] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.761205] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.766365] ? __lock_acquire+0x3173/0x3d50 [ 63.770660] ? __lock_acquire+0x6aa/0x3d50 [ 63.774869] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.780040] ? __lock_acquire+0x6aa/0x3d50 [ 63.784241] ? graph_lock+0x170/0x170 [ 63.788051] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 63.793233] ? check_noncircular+0x20/0x20 [ 63.797446] ? check_noncircular+0x20/0x20 [ 63.801651] ? check_noncircular+0x20/0x20 [ 63.805854] ? __lock_acquire+0x3173/0x3d50 [ 63.810155] ? __lock_acquire+0x6aa/0x3d50 [ 63.814371] lock_acquire+0x1d5/0x580 [ 63.818137] ? lock_acquire+0x1d5/0x580 [ 63.822082] ? snd_seq_deliver_event+0x27f/0x790 [ 63.826806] ? lock_release+0xa40/0xa40 [ 63.830769] ? check_same_owner+0x320/0x320 [ 63.835061] ? lock_release+0xa40/0xa40 [ 63.839005] ? __might_sleep+0x95/0x190 [ 63.842960] down_read_nested+0x9a/0x150 [ 63.846991] ? snd_seq_deliver_event+0x27f/0x790 [ 63.851716] ? down_read_non_owner+0x40/0x40 [ 63.856101] ? _raw_read_unlock+0x22/0x30 [ 63.860218] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 63.864871] snd_seq_deliver_event+0x27f/0x790 [ 63.869424] ? do_raw_spin_trylock+0x190/0x190 [ 63.873977] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 63.880442] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 63.885514] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 63.890501] ? snd_seq_client_use_ptr+0x85/0x330 [ 63.895226] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 63.900562] dummy_input+0x2c4/0x400 [ 63.904244] ? dummy_free+0x20/0x20 [ 63.907839] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 63.912475] ? dummy_free+0x20/0x20 [ 63.916072] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 63.922363] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 63.927523] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 63.932422] ? update_timestamp_of_queue+0x14d/0x200 [ 63.937497] snd_seq_deliver_event+0x31e/0x790 [ 63.942051] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 63.948543] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 63.953549] ? snd_seq_client_use_ptr+0x85/0x330 [ 63.958285] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 63.963628] dummy_input+0x2c4/0x400 [ 63.967320] ? dummy_free+0x20/0x20 [ 63.970924] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 63.975571] ? dummy_free+0x20/0x20 [ 63.979176] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 63.985478] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 63.990646] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 63.995552] ? update_timestamp_of_queue+0x14d/0x200 [ 64.000635] snd_seq_deliver_event+0x31e/0x790 [ 64.005316] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 64.012168] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 64.017158] ? snd_seq_client_use_ptr+0x85/0x330 [ 64.021883] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 64.027213] dummy_input+0x2c4/0x400 [ 64.030893] ? dummy_free+0x20/0x20 [ 64.034487] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 64.039122] ? dummy_free+0x20/0x20 [ 64.042713] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 64.048995] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 64.054244] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 64.059141] ? update_timestamp_of_queue+0x14d/0x200 [ 64.064210] snd_seq_deliver_event+0x31e/0x790 [ 64.068759] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 64.075215] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 64.080197] ? snd_seq_client_use_ptr+0x85/0x330 [ 64.084921] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 64.090250] dummy_input+0x2c4/0x400 [ 64.093928] ? dummy_free+0x20/0x20 [ 64.097520] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 64.102154] ? dummy_free+0x20/0x20 [ 64.105745] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 64.112032] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 64.117186] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 64.122079] ? update_timestamp_of_queue+0x14d/0x200 [ 64.127147] snd_seq_deliver_event+0x31e/0x790 [ 64.131698] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 64.138163] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 64.143144] ? snd_seq_client_use_ptr+0x85/0x330 [ 64.147867] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 64.153197] dummy_input+0x2c4/0x400 [ 64.156877] ? dummy_free+0x20/0x20 [ 64.160470] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 64.165105] ? dummy_free+0x20/0x20 [ 64.168698] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 64.174981] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 64.180136] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 64.185030] ? update_timestamp_of_queue+0x14d/0x200 [ 64.190101] snd_seq_deliver_event+0x31e/0x790 [ 64.194664] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 64.201122] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 64.206104] ? snd_seq_client_use_ptr+0x85/0x330 [ 64.210829] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 64.216160] dummy_input+0x2c4/0x400 [ 64.219839] ? dummy_free+0x20/0x20 [ 64.223433] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 64.228065] ? dummy_free+0x20/0x20 [ 64.231664] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 64.237957] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 64.243113] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 64.248014] ? update_timestamp_of_queue+0x14d/0x200 [ 64.253094] snd_seq_deliver_event+0x31e/0x790 [ 64.257646] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 64.264106] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 64.269087] ? snd_seq_client_use_ptr+0x85/0x330 [ 64.273807] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 64.279136] dummy_input+0x2c4/0x400 [ 64.282816] ? dummy_free+0x20/0x20 [ 64.286417] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 64.291052] ? dummy_free+0x20/0x20 [ 64.294647] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 64.300932] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 64.306089] ? snd_seq_client_use_ptr+0x80/0x330 [ 64.310810] snd_seq_deliver_event+0x12c/0x790 [ 64.315357] ? do_raw_spin_trylock+0x190/0x190 [ 64.319904] ? lock_downgrade+0x950/0x990 [ 64.324018] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 64.330476] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 64.335542] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 64.340523] ? trace_hardirqs_on+0xd/0x10 [ 64.344637] ? snd_seq_client_use_ptr+0x85/0x330 [ 64.349358] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 64.354687] snd_seq_oss_midi_reset+0x44b/0x700 [ 64.359319] ? snd_seq_oss_midi_filemode+0xf0/0xf0 [ 64.364214] snd_seq_oss_synth_reset+0x398/0x980 [ 64.368935] ? locks_remove_file+0x3fa/0x5a0 [ 64.373309] ? snd_seq_oss_synth_cleanup+0x400/0x400 [ 64.378378] ? __fsnotify_parent+0xb4/0x3a0 [ 64.382666] snd_seq_oss_reset+0x6c/0x260 [ 64.386796] ? free_info_entries+0x36/0x36 [ 64.390993] snd_seq_oss_release+0x71/0x120 [ 64.395276] odev_release+0x52/0x70 [ 64.398874] __fput+0x327/0x7e0 [ 64.402124] ? fput+0x140/0x140 [ 64.405368] ? check_same_owner+0x320/0x320 [ 64.409664] ? _raw_spin_unlock_irq+0x27/0x70 [ 64.414126] ____fput+0x15/0x20 [ 64.417372] task_work_run+0x199/0x270 [ 64.421224] ? task_work_cancel+0x210/0x210 [ 64.425508] ? _raw_spin_unlock+0x22/0x30 [ 64.429621] ? switch_task_namespaces+0x87/0xc0 [ 64.434262] do_exit+0x9b5/0x1ad0 [ 64.437686] ? mm_update_next_owner+0x930/0x930 [ 64.442321] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 64.447311] ? snd_seq_client_use_ptr+0x85/0x330 [ 64.452034] ? snd_seq_kernel_client_dispatch+0xfa/0x150 [ 64.457450] ? snd_seq_system_notify+0x11b/0x160 [ 64.462175] ? snd_seq_client_notify_subscription+0x16f/0x210 [ 64.468033] ? snd_seq_dispatch_event+0x5b0/0x5b0 [ 64.472843] ? check_subscription_permission.isra.3+0x11d/0x1d0 [ 64.478870] ? kasan_check_write+0x14/0x20 [ 64.483069] ? snd_seq_ioctl_unsubscribe_port+0x2c0/0x2c0 [ 64.488569] ? snd_seq_ioctl+0x126/0x400 [ 64.492593] ? snd_seq_open+0x570/0x570 [ 64.496535] ? compat_SyS_futex+0x288/0x380 [ 64.500819] do_group_exit+0x149/0x400 [ 64.504669] ? compat_SyS_get_robust_list+0x300/0x300 [ 64.509828] ? snd_seq_ioctl+0x400/0x400 [ 64.513851] ? SyS_exit+0x30/0x30 [ 64.517273] ? do_ioctl+0x60/0x60 [ 64.520690] ? do_fast_syscall_32+0x158/0xf05 [ 64.525147] ? do_group_exit+0x400/0x400 [ 64.529176] SyS_exit_group+0x1d/0x20 [ 64.532941] do_fast_syscall_32+0x3f2/0xf05 [ 64.537231] ? do_int80_syscall_32+0x940/0x940 [ 64.541776] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 64.546494] ? syscall_return_slowpath+0x2b3/0x510 [ 64.551389] ? prepare_exit_to_usermode+0x2d0/0x2d0 [ 64.556370] ? sysret32_from_system_call+0x5/0x3b [ 64.561187] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 64.565996] entry_SYSENTER_compat+0x51/0x60 [ 64.570368] RIP: 0023:0xf7f43c79 [ 64.573697] RSP: 002b:00000000ffd635cc EFLAGS: 00000282 ORIG_RAX: 00000000000000fc [ 64.581368] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000000000 [ 64.588601] RDX: 0000000000000000 RSI: 0000000000000000 RDI: