[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.223' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.122517] audit: type=1400 audit(1599650151.985:8): avc: denied { execmem } for pid=6361 comm="syz-executor814" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 55.145272] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 56.285115] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x55d35d6edb30 [ 56.295290] ------------[ cut here ]------------ [ 56.300061] WARNING: CPU: 0 PID: 5 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb [ 56.308815] Kernel panic - not syncing: panic_on_warn set ... [ 56.308815] [ 56.316173] CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.196-syzkaller #0 [ 56.323519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.332870] Workqueue: tipc_send tipc_send_work [ 56.337522] Call Trace: [ 56.340114] dump_stack+0x1b2/0x283 [ 56.343733] panic+0x1f9/0x42d [ 56.346914] ? add_taint.cold+0x16/0x16 [ 56.350880] ? debug_print_object.cold+0xa7/0xdb [ 56.355971] ? debug_print_object.cold+0xa7/0xdb [ 56.360712] __warn.cold+0x20/0x4b [ 56.364240] ? ist_end_non_atomic+0x10/0x10 [ 56.368553] ? debug_print_object.cold+0xa7/0xdb [ 56.373296] report_bug+0x208/0x249 [ 56.376912] do_error_trap+0x195/0x2d0 [ 56.380790] ? math_error+0x2d0/0x2d0 [ 56.385199] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 56.390044] invalid_op+0x1b/0x40 [ 56.393504] RIP: 0010:debug_print_object.cold+0xa7/0xdb [ 56.398861] RSP: 0018:ffff8880a983fa38 EFLAGS: 00010286 [ 56.404211] RAX: 000000000000005f RBX: 0000000000000005 RCX: 0000000000000000 [ 56.411468] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1015307f3d [ 56.418726] RBP: ffffffff86abc580 R08: 000000000000005f R09: 0000000000000000 [ 56.425989] R10: 0000000000000000 R11: 0000000000000000 R12: 000055d35d6edb30 [ 56.433267] R13: 0000000000000000 R14: ffff88809843ce18 R15: 1ffff11015307f50 [ 56.440552] ? debug_print_object.cold+0xa7/0xdb [ 56.445305] debug_object_assert_init+0x1d3/0x2d0 [ 56.450142] ? trace_hardirqs_on+0x10/0x10 [ 56.454368] ? debug_object_active_state+0x330/0x330 [ 56.459470] ? reacquire_held_locks+0xb5/0x3f0 [ 56.464049] ? selinux_socket_sendmsg+0x1d8/0x260 [ 56.468894] del_timer+0x5d/0xe0 [ 56.472258] ? process_timeout+0x20/0x20 [ 56.476328] tipc_subscrb_subscrp_delete+0x13a/0x330 [ 56.481439] ? tipc_subscrb_subscrp_delete+0x330/0x330 [ 56.486756] tipc_subscrb_release_cb+0x13/0x20 [ 56.491334] tipc_close_conn+0x16a/0x200 [ 56.495398] tipc_send_work+0x41e/0x520 [ 56.499372] ? tipc_recv_work+0xd0/0xd0 [ 56.503343] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 56.508799] process_one_work+0x793/0x14a0 [ 56.513204] ? work_busy+0x320/0x320 [ 56.516918] ? worker_thread+0x158/0xff0 [ 56.520972] ? _raw_spin_unlock_irq+0x24/0x80 [ 56.525475] worker_thread+0x5cc/0xff0 [ 56.529364] ? rescuer_thread+0xc80/0xc80 [ 56.533519] kthread+0x30d/0x420 [ 56.536889] ? kthread_create_on_node+0xd0/0xd0 [ 56.541551] ret_from_fork+0x24/0x30 [ 56.546546] Kernel Offset: disabled [ 56.550213] Rebooting in 86400 seconds..