[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts. syzkaller login: [ 41.253678] audit: type=1400 audit(1596134207.747:8): avc: denied { execmem } for pid=6476 comm="syz-executor267" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 41.283373] IPVS: ftp: loaded support on port[0] = 21 executing program [ 44.425251] Bluetooth: hci0: command 0x0409 tx timeout [ 46.504175] Bluetooth: hci0: command 0x041b tx timeout [ 47.392393] ------------[ cut here ]------------ [ 47.397354] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 47.407835] WARNING: CPU: 0 PID: 6505 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 [ 47.416579] Kernel panic - not syncing: panic_on_warn set ... [ 47.416579] [ 47.423956] CPU: 0 PID: 6505 Comm: syz-executor267 Not tainted 4.19.135-syzkaller #0 [ 47.431826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.441186] Call Trace: [ 47.443822] dump_stack+0x1fc/0x2fe [ 47.447481] panic+0x26a/0x50e [ 47.450685] ? __warn_printk+0xf3/0xf3 [ 47.454603] ? debug_print_object+0x160/0x250 [ 47.459108] ? __probe_kernel_read+0x16c/0x1b0 [ 47.463793] ? __warn.cold+0x5/0x61 [ 47.467431] ? __warn+0xe4/0x200 [ 47.470793] ? debug_print_object+0x160/0x250 [ 47.475308] __warn.cold+0x20/0x61 [ 47.478861] ? debug_print_object+0x160/0x250 [ 47.483368] report_bug+0x262/0x2b0 [ 47.487013] do_error_trap+0x1d7/0x310 [ 47.490890] ? math_error+0x310/0x310 [ 47.494690] ? irq_work_claim+0xa6/0xc0 [ 47.498664] ? irq_work_queue+0x29/0x80 [ 47.502650] ? wake_up_klogd.part.0+0x8c/0xc0 [ 47.507158] ? trace_hardirqs_off_caller+0x69/0x210 [ 47.512256] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.517127] invalid_op+0x14/0x20 [ 47.520597] RIP: 0010:debug_print_object+0x160/0x250 [ 47.525705] Code: dd 40 13 cb 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 40 13 cb 87 48 c7 c7 c0 08 cb 87 e8 db 0d dd fd <0f> 0b 83 05 e3 0c 4e 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 47.544596] RSP: 0018:ffff8880896974d8 EFLAGS: 00010086 [ 47.549981] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 47.557344] RDX: 0000000000000000 RSI: ffffffff8154cf01 RDI: ffffed10112d2e8d [ 47.564615] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 47.571898] R10: 0000000000000005 R11: ffffffff8ad3601b R12: ffffffff88da08e0 [ 47.579172] R13: ffffffff815a2ad0 R14: ffff8880848876a8 R15: 1ffff110112d2ea6 [ 47.586992] ? calc_wheel_index+0x230/0x230 [ 47.591309] ? vprintk_func+0x81/0x17e [ 47.595187] ? debug_print_object+0x160/0x250 [ 47.599676] debug_object_assert_init+0x1f0/0x2e0 [ 47.604560] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 47.609669] ? debug_object_free+0x380/0x380 [ 47.614086] ? __queue_work+0x5f1/0x1100 [ 47.618146] del_timer+0x6d/0x100 [ 47.621600] ? run_timer_softirq+0x670/0x670 [ 47.626020] ? do_raw_spin_unlock+0x171/0x230 [ 47.630509] ? _raw_spin_unlock+0x29/0x40 [ 47.634658] ? trace_hardirqs_off+0x64/0x200 [ 47.639078] try_to_grab_pending+0x2b6/0x6f0 [ 47.643494] cancel_delayed_work+0x76/0x2c0 [ 47.647815] ? cancel_delayed_work_sync+0x20/0x20 [ 47.652665] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 47.657275] ? queue_delayed_work_on+0x122/0x200 [ 47.662029] l2cap_chan_del+0x53a/0x8e0 [ 47.666005] l2cap_chan_close+0x108/0x820 [ 47.670167] ? __set_monitor_timer+0x130/0x130 [ 47.674857] ? wait_for_completion_io+0x10/0x10 [ 47.679535] ? mark_held_locks+0xa6/0xf0 [ 47.683766] ? __local_bh_enable_ip+0x159/0x270 [ 47.688712] l2cap_sock_shutdown+0x85e/0xbd0 [ 47.693856] ? switch_task_namespaces+0xaa/0xc0 [ 47.698537] ? do_exit+0xbad/0x2b70 [ 47.702164] ? l2cap_skb_msg_name+0x120/0x120 [ 47.706694] ? exit_to_usermode_loop+0x204/0x2a0 [ 47.711813] ? do_syscall_64+0x538/0x620 [ 47.715871] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.721241] ? mark_held_locks+0xf0/0xf0 [ 47.725315] ? l2cap_sock_release+0x56/0x190 [ 47.729739] ? lock_downgrade+0x720/0x720 [ 47.733909] ? do_raw_write_lock+0xb8/0x1e0 [ 47.738261] l2cap_sock_release+0x63/0x190 [ 47.742522] __sock_release+0xcd/0x2a0 [ 47.746497] ? __sock_release+0x2a0/0x2a0 [ 47.750767] sock_close+0x15/0x20 [ 47.754218] __fput+0x2ce/0x890 [ 47.757489] task_work_run+0x148/0x1c0 [ 47.761382] do_exit+0xbb2/0x2b70 [ 47.764837] ? mark_held_locks+0xf0/0xf0 [ 47.768892] ? mm_update_next_owner+0x650/0x650 [ 47.773566] ? get_signal+0x388/0x1f70 [ 47.777646] ? lock_downgrade+0x720/0x720 [ 47.781889] ? lock_acquire+0x170/0x3c0 [ 47.785870] do_group_exit+0x125/0x310 [ 47.789758] get_signal+0x3f2/0x1f70 [ 47.793478] ? __local_bh_enable_ip+0x159/0x270 [ 47.798495] do_signal+0x8f/0x1670 [ 47.802035] ? l2cap_sock_accept+0x4d0/0x4d0 [ 47.806451] ? __local_bh_enable_ip+0x159/0x270 [ 47.811137] ? selinux_netlbl_socket_connect+0x2e/0x40 [ 47.816424] ? setup_sigcontext+0x820/0x820 [ 47.820765] ? l2cap_sock_accept+0x4d0/0x4d0 [ 47.825172] ? __ia32_sys_accept+0xb0/0xb0 [ 47.829414] ? exit_to_usermode_loop+0x36/0x2a0 [ 47.834079] exit_to_usermode_loop+0x204/0x2a0 [ 47.838672] do_syscall_64+0x538/0x620 [ 47.842552] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.847809] RIP: 0033:0x446d39 [ 47.851023] Code: Bad RIP value. [ 47.854386] RSP: 002b:00007ffd5a7d03d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 47.862082] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446d39 [ 47.869356] RDX: 0000000000000080 RSI: 0000000020000080 RDI: 0000000000000004 [ 47.876623] RBP: 00007ffd5a7d0410 R08: 0000000000000000 R09: 00000000000000ff [ 47.883881] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004 [ 47.891154] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 47.899595] Kernel Offset: disabled [ 47.903312] Rebooting in 86400 seconds..