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 '10.128.10.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.456958] FAULT_INJECTION: forcing a failure. [ 37.456958] name failslab, interval 1, probability 0, space 0, times 1 [ 37.468281] CPU: 1 PID: 4411 Comm: syzkaller441154 Not tainted 4.16.0+ #1 [ 37.475185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.484521] Call Trace: [ 37.487101] dump_stack+0x1b9/0x294 [ 37.490712] ? dump_stack_print_info.cold.2+0x52/0x52 [ 37.495883] ? perf_trace_lock_acquire+0xe3/0x980 [ 37.500707] ? check_usage_forwards+0x3a0/0x3a0 [ 37.505353] ? __bfs+0xa8/0x790 [ 37.508618] should_fail.cold.4+0xa/0x1a [ 37.512664] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 37.517755] ? kasan_check_read+0x11/0x20 [ 37.521883] ? graph_lock+0x170/0x170 [ 37.525661] ? perf_trace_lock+0x900/0x900 [ 37.529878] ? find_held_lock+0x36/0x1c0 [ 37.533931] ? __lock_is_held+0xb5/0x140 [ 37.537982] ? check_same_owner+0x320/0x320 [ 37.542281] ? kasan_check_read+0x11/0x20 [ 37.546423] ? rcu_note_context_switch+0x710/0x710 [ 37.551336] __should_failslab+0x124/0x180 [ 37.555550] should_failslab+0x9/0x14 [ 37.559330] __kmalloc_track_caller+0x2c4/0x760 [ 37.563974] ? perf_trace_lock+0x900/0x900 [ 37.568191] ? kasan_check_write+0x14/0x20 [ 37.572412] ? __mutex_lock+0x7d9/0x17f0 [ 37.576455] ? kstrdup_const+0x66/0x80 [ 37.580322] kstrdup+0x39/0x70 [ 37.583493] kstrdup_const+0x66/0x80 [ 37.587189] __kernfs_new_node+0xa8/0x580 [ 37.591320] ? kernfs_dop_revalidate+0x3c0/0x3c0 [ 37.596059] ? lock_downgrade+0x8e0/0x8e0 [ 37.600193] kernfs_new_node+0x80/0xf0 [ 37.604060] kernfs_create_dir_ns+0x3d/0x140 [ 37.608449] sysfs_create_dir_ns+0xbe/0x1d0 [ 37.612754] kobject_add_internal+0x353/0xba0 [ 37.617231] ? kobj_ns_type_registered+0x60/0x60 [ 37.621966] ? lock_downgrade+0x8e0/0x8e0 [ 37.626095] ? refcount_add_not_zero+0x320/0x320 [ 37.630832] ? kasan_check_read+0x11/0x20 [ 37.634959] kobject_add+0x13a/0x190 [ 37.638650] ? kset_create_and_add+0x190/0x190 [ 37.643217] ? mutex_unlock+0xd/0x10 [ 37.646911] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 37.651823] device_add+0x3a5/0x16d0 [ 37.655522] ? dev_set_name+0xa4/0xc0 [ 37.659300] ? device_private_init+0x230/0x230 [ 37.663862] ? rtnl_is_locked+0xae/0xe0 [ 37.667815] ? rtnl_trylock+0x20/0x20 [ 37.671598] netdev_register_kobject+0x180/0x380 [ 37.676340] register_netdevice+0x997/0x11c0 [ 37.680730] ? netdev_change_features+0x100/0x100 [ 37.685567] ppp_dev_configure+0xa8b/0xe70 [ 37.689783] ? ppp_register_channel+0x80/0x80 [ 37.694256] ? debug_check_no_locks_freed+0x310/0x310 [ 37.699431] ppp_ioctl+0x1d0d/0x30b2 [ 37.703120] ? graph_lock+0x170/0x170 [ 37.706900] ? ppp_input_error+0x220/0x220 [ 37.711117] ? perf_trace_lock+0x900/0x900 [ 37.715328] ? find_held_lock+0x36/0x1c0 [ 37.719369] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.724894] ? _parse_integer+0x13b/0x190 [ 37.729021] ? graph_lock+0x170/0x170 [ 37.732811] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 37.738329] ? _kstrtoull+0x180/0x230 [ 37.742107] ? _parse_integer+0x190/0x190 [ 37.746234] ? graph_lock+0x170/0x170 [ 37.750014] ? lock_release+0xa10/0xa10 [ 37.753969] ? find_held_lock+0x36/0x1c0 [ 37.758018] ? lock_downgrade+0x8e0/0x8e0 [ 37.762157] ? kasan_check_read+0x11/0x20 [ 37.766290] ? rcu_is_watching+0x85/0x140 [ 37.770418] ? pid_task+0x10e/0x1e0 [ 37.774028] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 37.779200] ? save_stack+0xa9/0xd0 [ 37.782804] ? graph_lock+0x170/0x170 [ 37.786587] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 37.792103] ? proc_fail_nth_write+0x96/0x1f0 [ 37.796585] ? proc_cwd_link+0x1d0/0x1d0 [ 37.800621] ? kasan_check_read+0x11/0x20 [ 37.804747] ? do_raw_spin_unlock+0x9e/0x2e0 [ 37.809132] ? find_held_lock+0x36/0x1c0 [ 37.813178] ? lock_downgrade+0x8e0/0x8e0 [ 37.817306] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.822474] ? ppp_input_error+0x220/0x220 [ 37.826690] do_vfs_ioctl+0x1cf/0x16a0 [ 37.830562] ? ioctl_preallocate+0x2e0/0x2e0 [ 37.834952] ? fget_raw+0x20/0x20 [ 37.838389] ? __sb_end_write+0xac/0xe0 [ 37.842346] ? ksys_write+0x1a6/0x250 [ 37.846132] ? security_file_ioctl+0x94/0xc0 [ 37.850524] ksys_ioctl+0xa9/0xd0 [ 37.853960] SyS_ioctl+0x24/0x30 [ 37.857305] ? ksys_ioctl+0xd0/0xd0 [ 37.860912] do_syscall_64+0x29e/0x9d0 [ 37.864779] ? vmalloc_sync_all+0x30/0x30 [ 37.868908] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 37.873647] ? syscall_return_slowpath+0x5c0/0x5c0 [ 37.878557] ? syscall_return_slowpath+0x30f/0x5c0 [ 37.883472] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 37.888818] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.893658] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 37.898827] RIP: 0033:0x440559 [ 37.901998] RSP: 002b:00007fffe4c32b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 37.909690] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440559 [ 37.916944] RDX: 0000000020000a80 RSI: 00000000c004743e RDI: 0000000000000004 [ 37.924207] RBP: 00000000006cb018 R08: 0000000000000001 R09: 00007fffe4c30037 [ 37.931457] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 37.938707] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 37.946577] ------------[ cut here ]------------ [ 37.951352] kobject_add_internal failed for ppp0 (error: -12 parent: net) [ 37.958577] WARNING: CPU: 1 PID: 4411 at lib/kobject.c:242 kobject_add_internal+0x42c/0xba0 [ 37.967058] Kernel panic - not syncing: panic_on_warn set ... [ 37.967058] [ 37.974412] CPU: 1 PID: 4411 Comm: syzkaller441154 Not tainted 4.16.0+ #1 [ 37.981315] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.990649] Call Trace: [ 37.993224] dump_stack+0x1b9/0x294 [ 37.996838] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.002012] ? kobject_add_internal+0x420/0xba0 [ 38.006662] panic+0x22f/0x4de [ 38.009834] ? add_taint.cold.5+0x16/0x16 [ 38.013981] ? __warn.cold.8+0x148/0x1b3 [ 38.018057] ? __warn.cold.8+0x117/0x1b3 [ 38.022124] ? kobject_add_internal+0x42c/0xba0 [ 38.026776] __warn.cold.8+0x163/0x1b3 [ 38.030644] ? kobject_add_internal+0x42c/0xba0 [ 38.035295] report_bug+0x252/0x2d0 [ 38.038918] do_error_trap+0x1de/0x490 [ 38.042808] ? math_error+0x420/0x420 [ 38.046589] ? vprintk_default+0x28/0x30 [ 38.050629] ? vprintk_func+0x81/0xe7 [ 38.054410] ? printk+0x9e/0xba [ 38.057682] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.062507] do_invalid_op+0x1b/0x20 [ 38.066207] invalid_op+0x1b/0x40 [ 38.069642] RIP: 0010:kobject_add_internal+0x42c/0xba0 [ 38.074895] RSP: 0018:ffff8801bd0a7220 EFLAGS: 00010286 [ 38.080235] RAX: 000000000000003d RBX: ffff8801b855e7e8 RCX: ffffffff815f58cd [ 38.087485] RDX: 0000000000000000 RSI: ffffffff815fa581 RDI: ffff8801bd0a6d80 [ 38.094733] RBP: ffff8801bd0a7318 R08: ffff8801b0e9c1c0 R09: 0000000000000006 [ 38.101980] R10: ffff8801b0e9c1c0 R11: 0000000000000000 R12: 00000000fffffff4 [ 38.109229] R13: ffff8801d8321b00 R14: ffffffff882a9fe0 R15: ffff8801d9fc8f00 [ 38.116488] ? console_unlock+0x8ad/0x1100 [ 38.120715] ? vprintk_func+0x81/0xe7 [ 38.124501] ? kobj_ns_type_registered+0x60/0x60 [ 38.129237] ? lock_downgrade+0x8e0/0x8e0 [ 38.133367] ? refcount_add_not_zero+0x320/0x320 [ 38.138108] ? kasan_check_read+0x11/0x20 [ 38.142240] kobject_add+0x13a/0x190 [ 38.145930] ? kset_create_and_add+0x190/0x190 [ 38.150497] ? mutex_unlock+0xd/0x10 [ 38.154186] ? __mutex_unlock_slowpath+0x180/0x8a0 [ 38.159105] device_add+0x3a5/0x16d0 [ 38.162799] ? dev_set_name+0xa4/0xc0 [ 38.166577] ? device_private_init+0x230/0x230 [ 38.171148] ? rtnl_is_locked+0xae/0xe0 [ 38.175101] ? rtnl_trylock+0x20/0x20 [ 38.178889] netdev_register_kobject+0x180/0x380 [ 38.183629] register_netdevice+0x997/0x11c0 [ 38.188018] ? netdev_change_features+0x100/0x100 [ 38.192850] ppp_dev_configure+0xa8b/0xe70 [ 38.197065] ? ppp_register_channel+0x80/0x80 [ 38.201542] ? debug_check_no_locks_freed+0x310/0x310 [ 38.206717] ppp_ioctl+0x1d0d/0x30b2 [ 38.210408] ? graph_lock+0x170/0x170 [ 38.214191] ? ppp_input_error+0x220/0x220 [ 38.218412] ? perf_trace_lock+0x900/0x900 [ 38.222625] ? find_held_lock+0x36/0x1c0 [ 38.226672] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.232196] ? _parse_integer+0x13b/0x190 [ 38.236323] ? graph_lock+0x170/0x170 [ 38.240102] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 38.245618] ? _kstrtoull+0x180/0x230 [ 38.249397] ? _parse_integer+0x190/0x190 [ 38.253520] ? graph_lock+0x170/0x170 [ 38.257299] ? lock_release+0xa10/0xa10 [ 38.261250] ? find_held_lock+0x36/0x1c0 [ 38.265296] ? lock_downgrade+0x8e0/0x8e0 [ 38.269429] ? kasan_check_read+0x11/0x20 [ 38.273560] ? rcu_is_watching+0x85/0x140 [ 38.277698] ? pid_task+0x10e/0x1e0 [ 38.281315] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 38.286485] ? save_stack+0xa9/0xd0 [ 38.290088] ? graph_lock+0x170/0x170 [ 38.293896] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 38.299419] ? proc_fail_nth_write+0x96/0x1f0 [ 38.303893] ? proc_cwd_link+0x1d0/0x1d0 [ 38.307934] ? kasan_check_read+0x11/0x20 [ 38.312063] ? do_raw_spin_unlock+0x9e/0x2e0 [ 38.316452] ? find_held_lock+0x36/0x1c0 [ 38.320498] ? lock_downgrade+0x8e0/0x8e0 [ 38.324629] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 38.329799] ? ppp_input_error+0x220/0x220 [ 38.334014] do_vfs_ioctl+0x1cf/0x16a0 [ 38.337884] ? ioctl_preallocate+0x2e0/0x2e0 [ 38.342274] ? fget_raw+0x20/0x20 [ 38.345706] ? __sb_end_write+0xac/0xe0 [ 38.349663] ? ksys_write+0x1a6/0x250 [ 38.353446] ? security_file_ioctl+0x94/0xc0 [ 38.357834] ksys_ioctl+0xa9/0xd0 [ 38.361267] SyS_ioctl+0x24/0x30 [ 38.364611] ? ksys_ioctl+0xd0/0xd0 [ 38.368218] do_syscall_64+0x29e/0x9d0 [ 38.372083] ? vmalloc_sync_all+0x30/0x30 [ 38.376216] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 38.380951] ? syscall_return_slowpath+0x5c0/0x5c0 [ 38.385862] ? syscall_return_slowpath+0x30f/0x5c0 [ 38.390775] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 38.396126] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.400949] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 38.406121] RIP: 0033:0x440559 [ 38.409290] RSP: 002b:00007fffe4c32b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 38.416978] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440559 [ 38.424227] RDX: 0000000020000a80 RSI: 00000000c004743e RDI: 0000000000000004 [ 38.431474] RBP: 00000000006cb018 R08: 0000000000000001 R09: 00007fffe4c30037 [ 38.438732] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 38.445981] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 38.453954] Dumping ftrace buffer: [ 38.457630] (ftrace buffer empty) [ 38.461327] Kernel Offset: disabled [ 38.464941] Rebooting in 86400 seconds..