[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.221' (ECDSA) to the list of known hosts. syzkaller login: [ 35.835018] audit: type=1400 audit(1596168682.027:8): avc: denied { execmem } for pid=6371 comm="syz-executor018" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 36.136061] IPVS: ftp: loaded support on port[0] = 21 executing program [ 40.052916] Bluetooth: hci0 command 0x0409 tx timeout [ 42.130606] Bluetooth: hci0 command 0x041b tx timeout [ 43.023860] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 43.051440] ------------[ cut here ]------------ [ 43.062020] WARNING: CPU: 1 PID: 6402 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb [ 43.079746] Kernel panic - not syncing: panic_on_warn set ... [ 43.079746] [ 43.090133] CPU: 1 PID: 6402 Comm: syz-executor018 Not tainted 4.14.190-syzkaller #0 [ 43.100916] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.115252] Call Trace: [ 43.119365] dump_stack+0x1b2/0x283 [ 43.123535] panic+0x1f9/0x42d [ 43.128290] ? add_taint.cold+0x16/0x16 [ 43.134066] ? debug_print_object.cold+0xa7/0xdb [ 43.140065] ? debug_print_object.cold+0xa7/0xdb [ 43.146130] __warn.cold+0x20/0x4b [ 43.150841] ? ist_end_non_atomic+0x10/0x10 [ 43.155526] ? debug_print_object.cold+0xa7/0xdb [ 43.160739] report_bug+0x208/0x249 [ 43.165138] do_error_trap+0x195/0x2d0 [ 43.169738] ? math_error+0x2d0/0x2d0 [ 43.174664] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.180413] invalid_op+0x1b/0x40 [ 43.183984] RIP: 0010:debug_print_object.cold+0xa7/0xdb [ 43.189908] RSP: 0018:ffff88809870f598 EFLAGS: 00010086 [ 43.196507] RAX: 0000000000000061 RBX: 0000000000000005 RCX: 0000000000000000 [ 43.204490] RDX: 0000000000000000 RSI: ffffffff86ac0dc0 RDI: ffffed10130e1ea9 [ 43.212371] RBP: ffffffff86abc080 R08: 0000000000000061 R09: 0000000000000003 [ 43.219889] R10: 0000000000000000 R11: ffff8880862e01c0 R12: 0000000000000000 [ 43.227803] R13: 0000000000000000 R14: ffff8880979c5930 R15: 1ffff110130e1ebc [ 43.235842] ? debug_print_object.cold+0xa7/0xdb [ 43.240939] debug_object_assert_init+0x1d3/0x2d0 [ 43.245883] ? debug_object_active_state+0x330/0x330 [ 43.250985] ? __queue_work+0x517/0xf70 [ 43.255320] ? lock_downgrade+0x740/0x740 [ 43.259460] del_timer+0x5d/0xe0 [ 43.262823] ? process_timeout+0x20/0x20 [ 43.266887] ? _raw_spin_unlock+0x29/0x40 [ 43.271055] ? __queue_work+0x517/0xf70 [ 43.275035] try_to_grab_pending+0x243/0x610 [ 43.279438] __cancel_work+0x68/0x240 [ 43.283249] ? try_to_grab_pending+0x610/0x610 [ 43.287834] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 43.292930] ? queue_delayed_work_on+0xfc/0x1d0 [ 43.297606] l2cap_chan_del+0x465/0x800 [ 43.301650] l2cap_chan_close+0xd5/0x770 [ 43.305854] ? __set_monitor_timer+0x110/0x110 [ 43.310445] ? wait_for_completion_io+0x10/0x10 [ 43.316464] ? __local_bh_enable_ip+0xc1/0x170 [ 43.321230] l2cap_sock_shutdown+0x74e/0xa60 [ 43.325650] ? do_exit+0xa03/0x27f0 [ 43.329341] ? do_group_exit+0x100/0x2e0 [ 43.333424] ? get_signal+0x38d/0x1ca0 [ 43.337424] ? l2cap_skb_msg_name+0x120/0x120 [ 43.343063] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 43.352580] ? trace_hardirqs_on+0x10/0x10 [ 43.359719] ? l2cap_sock_release+0x56/0x180 [ 43.368345] ? lock_downgrade+0x740/0x740 [ 43.373842] l2cap_sock_release+0x63/0x180 [ 43.381021] __sock_release+0xcd/0x2b0 [ 43.386906] ? __sock_release+0x2b0/0x2b0 [ 43.392869] sock_close+0x15/0x20 [ 43.398410] __fput+0x25f/0x7a0 [ 43.403774] task_work_run+0x11f/0x190 [ 43.411234] do_exit+0xa08/0x27f0 [ 43.417687] ? trace_hardirqs_on+0x10/0x10 [ 43.426344] ? mm_update_next_owner+0x5b0/0x5b0 [ 43.435738] ? get_signal+0x323/0x1ca0 [ 43.442759] ? lock_acquire+0x170/0x3f0 [ 43.454088] ? lock_downgrade+0x740/0x740 [ 43.460889] do_group_exit+0x100/0x2e0 [ 43.471200] get_signal+0x38d/0x1ca0 [ 43.479498] do_signal+0x7c/0x1550 [ 43.484239] ? __local_bh_enable_ip+0xc1/0x170 [ 43.493871] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 43.501579] ? l2cap_sock_connect+0x2f9/0x4f0 [ 43.508719] ? __local_bh_enable_ip+0xc1/0x170 [ 43.514569] ? setup_sigcontext+0x820/0x820 [ 43.520435] ? l2cap_sock_accept+0x440/0x440 [ 43.526569] ? security_socket_connect+0x83/0xb0 [ 43.532387] ? l2cap_sock_accept+0x440/0x440 [ 43.537950] ? SyS_connect+0xf6/0x240 [ 43.542416] ? SyS_accept+0x30/0x30 [ 43.546794] ? exit_to_usermode_loop+0x41/0x200 [ 43.552440] exit_to_usermode_loop+0x160/0x200 [ 43.557655] do_syscall_64+0x4a3/0x640 [ 43.561563] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 43.567426] RIP: 0033:0x446d69 [ 43.570616] RSP: 002b:00007ffe5b59fcb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 43.578986] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446d69 [ 43.586707] RDX: 000000000000000e RSI: 0000000020000000 RDI: 0000000000000004 [ 43.593999] RBP: 00007ffe5b59fcf0 R08: 0000000000000000 R09: 00000000000000ff [ 43.602230] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004 [ 43.610697] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 43.620613] Kernel Offset: disabled [ 43.625452] Rebooting in 86400 seconds..