[ 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 '10.128.0.141' (ECDSA) to the list of known hosts. syzkaller login: [ 33.355362] audit: type=1400 audit(1596758597.667:8): avc: denied { execmem } for pid=6369 comm="syz-executor509" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 33.625860] IPVS: ftp: loaded support on port[0] = 21 executing program [ 37.573792] Bluetooth: hci0 command 0x0409 tx timeout [ 39.652268] Bluetooth: hci0 command 0x041b tx timeout [ 40.543778] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 40.554306] ------------[ cut here ]------------ [ 40.559077] WARNING: CPU: 0 PID: 6400 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb [ 40.568077] Kernel panic - not syncing: panic_on_warn set ... [ 40.568077] [ 40.575417] CPU: 0 PID: 6400 Comm: syz-executor509 Not tainted 4.14.192-syzkaller #0 [ 40.583280] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.592608] Call Trace: [ 40.595177] dump_stack+0x1b2/0x283 [ 40.598783] panic+0x1f9/0x42d [ 40.601950] ? add_taint.cold+0x16/0x16 [ 40.605901] ? debug_print_object.cold+0xa7/0xdb [ 40.610636] ? debug_print_object.cold+0xa7/0xdb [ 40.615367] __warn.cold+0x20/0x4b [ 40.618883] ? ist_end_non_atomic+0x10/0x10 [ 40.623187] ? debug_print_object.cold+0xa7/0xdb [ 40.627917] report_bug+0x208/0x249 [ 40.631519] do_error_trap+0x195/0x2d0 [ 40.635379] ? math_error+0x2d0/0x2d0 [ 40.639177] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.643996] invalid_op+0x1b/0x40 [ 40.647430] RIP: 0010:debug_print_object.cold+0xa7/0xdb [ 40.652767] RSP: 0018:ffff888097fcf598 EFLAGS: 00010086 [ 40.658111] RAX: 0000000000000061 RBX: 0000000000000005 RCX: 0000000000000000 [ 40.665359] RDX: 0000000000000000 RSI: ffffffff86ac0dc0 RDI: ffffed1012ff9ea9 [ 40.672604] RBP: ffffffff86abc080 R08: 0000000000000061 R09: 0000000000000003 [ 40.679846] R10: 0000000000000000 R11: ffff88809724e140 R12: 0000000000000000 [ 40.687090] R13: 0000000000000000 R14: ffff88809770cc30 R15: 1ffff11012ff9ebc [ 40.694352] ? debug_print_object.cold+0xa7/0xdb [ 40.699082] debug_object_assert_init+0x1d3/0x2d0 [ 40.703937] ? debug_object_active_state+0x330/0x330 [ 40.709014] ? __queue_work+0x517/0xf70 [ 40.712971] ? lock_downgrade+0x740/0x740 [ 40.717097] del_timer+0x5d/0xe0 [ 40.720437] ? process_timeout+0x20/0x20 [ 40.724473] ? _raw_spin_unlock+0x29/0x40 [ 40.728592] ? __queue_work+0x517/0xf70 [ 40.732538] try_to_grab_pending+0x243/0x610 [ 40.736918] __cancel_work+0x68/0x240 [ 40.740693] ? try_to_grab_pending+0x610/0x610 [ 40.745273] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 40.750268] ? queue_delayed_work_on+0xfc/0x1d0 [ 40.754914] l2cap_chan_del+0x465/0x800 [ 40.758870] l2cap_chan_close+0xd5/0x770 [ 40.762908] ? __set_monitor_timer+0x110/0x110 [ 40.767463] ? wait_for_completion_io+0x10/0x10 [ 40.772106] ? __local_bh_enable_ip+0xc1/0x170 [ 40.776660] l2cap_sock_shutdown+0x74e/0xa60 [ 40.781041] ? do_exit+0xa03/0x27f0 [ 40.784641] ? do_group_exit+0x100/0x2e0 [ 40.788674] ? get_signal+0x38d/0x1ca0 [ 40.792534] ? l2cap_skb_msg_name+0x120/0x120 [ 40.797027] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 40.802377] ? trace_hardirqs_on+0x10/0x10 [ 40.806662] ? l2cap_sock_release+0x56/0x180 [ 40.811063] ? lock_downgrade+0x740/0x740 [ 40.815207] l2cap_sock_release+0x63/0x180 [ 40.819425] __sock_release+0xcd/0x2b0 [ 40.823289] ? __sock_release+0x2b0/0x2b0 [ 40.827413] sock_close+0x15/0x20 [ 40.830840] __fput+0x25f/0x7a0 [ 40.834100] task_work_run+0x11f/0x190 [ 40.837962] do_exit+0xa08/0x27f0 [ 40.841390] ? trace_hardirqs_on+0x10/0x10 [ 40.845598] ? mm_update_next_owner+0x5b0/0x5b0 [ 40.850241] ? get_signal+0x323/0x1ca0 [ 40.854118] ? lock_acquire+0x170/0x3f0 [ 40.858063] ? lock_downgrade+0x740/0x740 [ 40.862185] do_group_exit+0x100/0x2e0 [ 40.866063] get_signal+0x38d/0x1ca0 [ 40.869754] do_signal+0x7c/0x1550 [ 40.873266] ? __local_bh_enable_ip+0xc1/0x170 [ 40.877835] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 40.882823] ? l2cap_sock_connect+0x2f9/0x4f0 [ 40.887291] ? __local_bh_enable_ip+0xc1/0x170 [ 40.891845] ? setup_sigcontext+0x820/0x820 [ 40.896140] ? l2cap_sock_accept+0x440/0x440 [ 40.900523] ? security_socket_connect+0x83/0xb0 [ 40.905253] ? l2cap_sock_accept+0x440/0x440 [ 40.909637] ? SyS_connect+0xf6/0x240 [ 40.913411] ? SyS_accept+0x30/0x30 [ 40.917016] ? exit_to_usermode_loop+0x41/0x200 [ 40.921658] exit_to_usermode_loop+0x160/0x200 [ 40.926233] do_syscall_64+0x4a3/0x640 [ 40.930096] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 40.935258] RIP: 0033:0x446d89 [ 40.938441] RSP: 002b:00007fff3b5102a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 40.946122] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446d89 [ 40.953369] RDX: 0000000000000080 RSI: 00000000200000c0 RDI: 0000000000000004 [ 40.960614] RBP: 00007fff3b5102e0 R08: 0000000000000000 R09: 00000000000000ff [ 40.967858] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004 [ 40.975101] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 40.983702] Kernel Offset: disabled [ 40.987368] Rebooting in 86400 seconds..