[ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts. syzkaller login: [ 40.658133] audit: type=1400 audit(1598135314.904:8): avc: denied { execmem } for pid=6470 comm="syz-executor873" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program [ 41.792289] IPVS: ftp: loaded support on port[0] = 21 [ 43.793769] Bluetooth: hci0: command 0x0409 tx timeout [ 45.872057] Bluetooth: hci0: command 0x041b tx timeout [ 46.827898] ------------[ cut here ]------------ [ 46.832940] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 46.843289] WARNING: CPU: 0 PID: 6503 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 [ 46.852054] Kernel panic - not syncing: panic_on_warn set ... [ 46.852054] [ 46.859412] CPU: 0 PID: 6503 Comm: syz-executor873 Not tainted 4.19.141-syzkaller #0 [ 46.867283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.876614] Call Trace: [ 46.879187] dump_stack+0x1fc/0x2fe [ 46.882797] panic+0x26a/0x50e [ 46.885973] ? __warn_printk+0xf3/0xf3 [ 46.889861] ? debug_print_object+0x160/0x250 [ 46.894462] ? __probe_kernel_read+0x16c/0x1b0 [ 46.899023] ? __warn.cold+0x5/0x61 [ 46.902629] ? __warn+0xe4/0x200 [ 46.905990] ? debug_print_object+0x160/0x250 [ 46.910492] __warn.cold+0x20/0x61 [ 46.914028] ? debug_print_object+0x160/0x250 [ 46.918503] report_bug+0x262/0x2b0 [ 46.922126] do_error_trap+0x1d7/0x310 [ 46.926033] ? math_error+0x310/0x310 [ 46.929891] ? irq_work_claim+0xa6/0xc0 [ 46.933872] ? irq_work_queue+0x29/0x80 [ 46.937844] ? wake_up_klogd.part.0+0x8c/0xc0 [ 46.942337] ? trace_hardirqs_off_caller+0x69/0x210 [ 46.947335] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.952162] invalid_op+0x14/0x20 [ 46.955594] RIP: 0010:debug_print_object+0x160/0x250 [ 46.960674] Code: dd 80 19 cb 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 80 19 cb 87 48 c7 c7 00 0f cb 87 e8 1b f7 dc fd <0f> 0b 83 05 23 05 4e 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 46.979553] RSP: 0018:ffff88808f3cf4d8 EFLAGS: 00010086 [ 46.984898] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 46.992144] RDX: 0000000000000000 RSI: ffffffff8154cf81 RDI: ffffed1011e79e8d [ 46.999389] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 47.006638] R10: 0000000000000005 R11: ffffffff8ad3701b R12: ffffffff88da0de0 [ 47.013884] R13: ffffffff815a2b60 R14: ffff8880a4e31528 R15: 1ffff11011e79ea6 [ 47.021153] ? calc_wheel_index+0x230/0x230 [ 47.025490] ? vprintk_func+0x81/0x17e [ 47.029357] ? debug_print_object+0x160/0x250 [ 47.033863] debug_object_assert_init+0x1f0/0x2e0 [ 47.038699] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 47.043796] ? debug_object_free+0x380/0x380 [ 47.048200] ? __queue_work+0x5f1/0x1100 [ 47.052246] del_timer+0x6d/0x100 [ 47.055693] ? run_timer_softirq+0x670/0x670 [ 47.060082] ? do_raw_spin_unlock+0x171/0x230 [ 47.064565] ? _raw_spin_unlock+0x29/0x40 [ 47.068696] ? trace_hardirqs_off+0x64/0x200 [ 47.073103] try_to_grab_pending+0x2b6/0x6f0 [ 47.077631] cancel_delayed_work+0x76/0x2c0 [ 47.081945] ? cancel_delayed_work_sync+0x20/0x20 [ 47.086771] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 47.091349] ? queue_delayed_work_on+0x122/0x200 [ 47.096089] l2cap_chan_del+0x53a/0x8e0 [ 47.100047] l2cap_chan_close+0x108/0x820 [ 47.104191] ? __set_monitor_timer+0x130/0x130 [ 47.108784] ? wait_for_completion_io+0x10/0x10 [ 47.113447] ? mark_held_locks+0xa6/0xf0 [ 47.117490] ? __local_bh_enable_ip+0x159/0x270 [ 47.122148] l2cap_sock_shutdown+0x85e/0xbd0 [ 47.126541] ? switch_task_namespaces+0xaa/0xc0 [ 47.131294] ? do_exit+0xbad/0x2b70 [ 47.139691] ? l2cap_skb_msg_name+0x120/0x120 [ 47.144165] ? exit_to_usermode_loop+0x204/0x2a0 [ 47.148924] ? do_syscall_64+0x538/0x620 [ 47.152980] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.158337] ? mark_held_locks+0xf0/0xf0 [ 47.162482] ? l2cap_sock_release+0x56/0x190 [ 47.166879] ? lock_downgrade+0x720/0x720 [ 47.171022] ? do_raw_write_lock+0xb8/0x1e0 [ 47.175323] l2cap_sock_release+0x63/0x190 [ 47.179551] __sock_release+0xcd/0x2a0 [ 47.183505] ? __sock_release+0x2a0/0x2a0 [ 47.187634] sock_close+0x15/0x20 [ 47.191063] __fput+0x2ce/0x890 [ 47.194349] task_work_run+0x148/0x1c0 [ 47.198217] do_exit+0xbb2/0x2b70 [ 47.201651] ? mark_held_locks+0xf0/0xf0 [ 47.205689] ? mm_update_next_owner+0x650/0x650 [ 47.210349] ? get_signal+0x388/0x1f70 [ 47.214248] ? lock_downgrade+0x720/0x720 [ 47.218400] ? lock_acquire+0x170/0x3c0 [ 47.222355] do_group_exit+0x125/0x310 [ 47.226221] get_signal+0x3f2/0x1f70 [ 47.229917] ? __local_bh_enable_ip+0x159/0x270 [ 47.234580] do_signal+0x8f/0x1670 [ 47.238120] ? l2cap_sock_accept+0x4d0/0x4d0 [ 47.242518] ? __local_bh_enable_ip+0x159/0x270 [ 47.247167] ? selinux_netlbl_socket_connect+0x2e/0x40 [ 47.252436] ? setup_sigcontext+0x820/0x820 [ 47.256756] ? l2cap_sock_accept+0x4d0/0x4d0 [ 47.261150] ? __ia32_sys_accept+0xb0/0xb0 [ 47.265366] ? up_read+0x17/0x110 [ 47.268797] ? __do_page_fault+0x1ca/0xde0 [ 47.273013] ? exit_to_usermode_loop+0x36/0x2a0 [ 47.277661] exit_to_usermode_loop+0x204/0x2a0 [ 47.282223] do_syscall_64+0x538/0x620 [ 47.286090] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.291256] RIP: 0033:0x446d99 [ 47.294435] Code: Bad RIP value. [ 47.297782] RSP: 002b:00007ffe230535c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 47.305469] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446d99 [ 47.312714] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000004 [ 47.319975] RBP: 0000000000000003 R08: 00000000000000ff R09: 00000000000000ff [ 47.327235] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000024d1850 [ 47.334481] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 [ 47.342628] Kernel Offset: disabled [ 47.346281] Rebooting in 86400 seconds..