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-9,10.128.15.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.993931] BUG: looking up invalid subclass: 8 [ 33.994672] turning off the locking correctness validator. [ 33.995542] CPU: 1 PID: 2991 Comm: syzkaller370690 Not tainted 4.14.0-rc8+ #164 [ 33.996565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.997785] Call Trace: [ 33.998142] dump_stack+0x194/0x257 [ 33.998628] ? arch_local_irq_restore+0x53/0x53 [ 33.999252] register_lock_class+0x5f2/0x2c70 [ 33.999861] ? lock_pin_lock+0x360/0x360 [ 34.000405] ? noop_count+0x40/0x40 [ 34.000891] ? trace_hardirqs_off+0x10/0x10 [ 34.001467] ? __is_insn_slot_addr+0x1fc/0x330 [ 34.002091] ? lock_downgrade+0x990/0x990 [ 34.002643] ? lock_release+0xa40/0xa40 [ 34.003174] ? __is_insn_slot_addr+0x1fc/0x330 [ 34.003792] ? check_usage+0x23d/0xb70 [ 34.004314] ? lock_release+0xa40/0xa40 [ 34.004843] ? bpf_prog_kallsyms_find+0xbd/0x440 [ 34.005476] ? print_irqtrace_events+0x270/0x270 [ 34.006106] ? is_bpf_text_address+0x7b/0x120 [ 34.006702] ? __bfs+0xaa/0x750 [ 34.007143] ? lock_release+0xa40/0xa40 [ 34.007672] ? lockdep_on+0x50/0x50 [ 34.008157] ? trace_hardirqs_off+0x10/0x10 [ 34.008731] ? rcutorture_record_progress+0x10/0x10 [ 34.009411] ? print_irqtrace_events+0x270/0x270 [ 34.010039] ? is_bpf_text_address+0xa4/0x120 [ 34.010636] ? kernel_text_address+0x102/0x140 [ 34.011245] ? hlock_class+0x140/0x140 [ 34.011765] ? __kernel_text_address+0xd/0x40 [ 34.012369] __lock_acquire+0x224/0x3d50 [ 34.012925] ? __lock_acquire+0x6aa/0x3d50 [ 34.013491] ? snd_seq_deliver_event+0x27f/0x790 [ 34.014170] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 34.019324] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 34.024476] ? __lock_acquire+0x3173/0x3d50 [ 34.028762] ? __lock_acquire+0x6aa/0x3d50 [ 34.032967] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 34.038121] ? __lock_acquire+0x6aa/0x3d50 [ 34.042322] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 34.047479] ? check_noncircular+0x20/0x20 [ 34.051678] ? check_noncircular+0x20/0x20 [ 34.055878] ? check_noncircular+0x20/0x20 [ 34.060086] ? __lock_acquire+0x3173/0x3d50 [ 34.064377] ? __lock_acquire+0x6aa/0x3d50 [ 34.068581] lock_acquire+0x1d5/0x580 [ 34.072344] ? lock_acquire+0x1d5/0x580 [ 34.076280] ? snd_seq_deliver_event+0x27f/0x790 [ 34.081001] ? lock_release+0xa40/0xa40 [ 34.084947] ? check_same_owner+0x320/0x320 [ 34.089232] ? lock_release+0xa40/0xa40 [ 34.093171] ? __might_sleep+0x95/0x190 [ 34.097108] down_read_nested+0x9a/0x150 [ 34.101134] ? snd_seq_deliver_event+0x27f/0x790 [ 34.105854] ? down_read_non_owner+0x40/0x40 [ 34.110227] ? _raw_read_unlock+0x22/0x30 [ 34.114339] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.118973] snd_seq_deliver_event+0x27f/0x790 [ 34.123520] ? do_raw_spin_trylock+0x190/0x190 [ 34.128066] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.134527] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 34.139595] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.144574] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.149381] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.154709] dummy_input+0x2c4/0x400 [ 34.158386] ? dummy_free+0x20/0x20 [ 34.161976] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.166607] ? dummy_free+0x20/0x20 [ 34.170198] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 34.176484] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 34.181637] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 34.186530] ? update_timestamp_of_queue+0x14d/0x200 [ 34.191600] snd_seq_deliver_event+0x31e/0x790 [ 34.196150] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.202609] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.207589] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.212310] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.217638] dummy_input+0x2c4/0x400 [ 34.221317] ? dummy_free+0x20/0x20 [ 34.224910] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.229542] ? dummy_free+0x20/0x20 [ 34.233139] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 34.239424] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 34.244580] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 34.249475] ? update_timestamp_of_queue+0x14d/0x200 [ 34.254542] snd_seq_deliver_event+0x31e/0x790 [ 34.259092] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.265547] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.270534] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.275259] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.280593] dummy_input+0x2c4/0x400 [ 34.284287] ? dummy_free+0x20/0x20 [ 34.287883] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.292515] ? dummy_free+0x20/0x20 [ 34.296110] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 34.302395] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 34.307548] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 34.312450] ? update_timestamp_of_queue+0x14d/0x200 [ 34.317521] snd_seq_deliver_event+0x31e/0x790 [ 34.322076] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.328535] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.333517] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.338242] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.343570] dummy_input+0x2c4/0x400 [ 34.347247] ? dummy_free+0x20/0x20 [ 34.350837] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.355467] ? dummy_free+0x20/0x20 [ 34.359059] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 34.365342] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 34.370497] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 34.375391] ? update_timestamp_of_queue+0x14d/0x200 [ 34.380461] snd_seq_deliver_event+0x31e/0x790 [ 34.385010] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.391468] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.396450] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.401170] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.406499] dummy_input+0x2c4/0x400 [ 34.410177] ? dummy_free+0x20/0x20 [ 34.413767] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.418400] ? dummy_free+0x20/0x20 [ 34.421990] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 34.428284] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 34.433448] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 34.438341] ? update_timestamp_of_queue+0x14d/0x200 [ 34.443416] snd_seq_deliver_event+0x31e/0x790 [ 34.447965] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.455274] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.460260] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.464980] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.470315] dummy_input+0x2c4/0x400 [ 34.473993] ? dummy_free+0x20/0x20 [ 34.477583] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.482214] ? dummy_free+0x20/0x20 [ 34.485824] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 34.492106] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 34.497258] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 34.502151] ? update_timestamp_of_queue+0x14d/0x200 [ 34.507221] snd_seq_deliver_event+0x31e/0x790 [ 34.511769] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.518225] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.523215] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.527943] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.533271] dummy_input+0x2c4/0x400 [ 34.536948] ? dummy_free+0x20/0x20 [ 34.540542] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 34.545173] ? dummy_free+0x20/0x20 [ 34.548767] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 34.555056] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 34.560222] ? snd_seq_client_use_ptr+0x80/0x330 [ 34.564944] snd_seq_deliver_event+0x12c/0x790 [ 34.569491] ? do_raw_spin_trylock+0x190/0x190 [ 34.574039] ? lock_downgrade+0x950/0x990 [ 34.578151] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 34.584610] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 34.589676] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.594658] ? trace_hardirqs_on+0xd/0x10 [ 34.598770] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.603492] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 34.608824] snd_seq_oss_midi_reset+0x44b/0x700 [ 34.613457] ? snd_seq_oss_midi_filemode+0xf0/0xf0 [ 34.618351] snd_seq_oss_synth_reset+0x398/0x980 [ 34.623071] ? locks_remove_file+0x3fa/0x5a0 [ 34.627443] ? snd_seq_oss_synth_cleanup+0x400/0x400 [ 34.632518] ? __fsnotify_parent+0xb4/0x3a0 [ 34.636803] snd_seq_oss_reset+0x6c/0x260 [ 34.640922] ? free_info_entries+0x36/0x36 [ 34.645117] snd_seq_oss_release+0x71/0x120 [ 34.649401] odev_release+0x52/0x70 [ 34.652992] __fput+0x327/0x7e0 [ 34.656236] ? fput+0x140/0x140 [ 34.659483] ? check_same_owner+0x320/0x320 [ 34.663766] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.668245] ____fput+0x15/0x20 [ 34.671491] task_work_run+0x199/0x270 [ 34.675344] ? task_work_cancel+0x210/0x210 [ 34.679637] ? _raw_spin_unlock+0x22/0x30 [ 34.683748] ? switch_task_namespaces+0x87/0xc0 [ 34.688382] do_exit+0x9b5/0x1ad0 [ 34.691799] ? snd_seq_client_use_ptr+0x85/0x330 [ 34.696520] ? mm_update_next_owner+0x930/0x930 [ 34.701160] ? snd_seq_system_notify+0x11b/0x160 [ 34.705879] ? snd_seq_client_notify_subscription+0x16f/0x210 [ 34.711728] ? snd_seq_dispatch_event+0x5b0/0x5b0 [ 34.716533] ? check_subscription_permission.isra.3+0x11d/0x1d0 [ 34.722555] ? snd_seq_ioctl_subscribe_port+0x1e3/0x2c0 [ 34.727884] ? kasan_check_write+0x14/0x20 [ 34.732082] ? snd_seq_ioctl_unsubscribe_port+0x2c0/0x2c0 [ 34.737591] ? snd_seq_ioctl+0x126/0x400 [ 34.741615] ? snd_seq_open+0x570/0x570 [ 34.745559] ? snd_seq_open+0x570/0x570 [ 34.749496] ? do_vfs_ioctl+0x486/0x1520 [ 34.753524] ? ioctl_preallocate+0x2b0/0x2b0 [ 34.757899] ? selinux_capable+0x40/0x40 [ 34.761925] ? putname+0xf3/0x130 [ 34.765341] do_group_exit+0x149/0x400 [ 34.769195] ? SyS_exit+0x30/0x30 [ 34.772617] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.777599] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.782317] SyS_exit_group+0x1d/0x20 [ 34.786081] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 34.790798] RIP: 0033:0x442c58 [ 34.793951] RSP: 002b:00007ffdaf8554a