[ 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 '10.128.0.225' (ECDSA) to the list of known hosts. syzkaller login: [ 42.505422] audit: type=1400 audit(1596156516.693:8): avc: denied { execmem } for pid=6470 comm="syz-executor130" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 42.524895] IPVS: ftp: loaded support on port[0] = 21 executing program [ 45.682378] Bluetooth: hci0: command 0x0409 tx timeout [ 47.761197] Bluetooth: hci0: command 0x041b tx timeout [ 48.641329] ------------[ cut here ]------------ [ 48.646261] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 48.656570] WARNING: CPU: 0 PID: 6501 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 [ 48.665432] Kernel panic - not syncing: panic_on_warn set ... [ 48.665432] [ 48.672812] CPU: 0 PID: 6501 Comm: syz-executor130 Not tainted 4.19.135-syzkaller #0 [ 48.680677] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.690035] Call Trace: [ 48.692625] dump_stack+0x1fc/0x2fe [ 48.696247] panic+0x26a/0x50e [ 48.699451] ? __warn_printk+0xf3/0xf3 [ 48.703329] ? debug_print_object+0x160/0x250 [ 48.707818] ? __probe_kernel_read+0x16c/0x1b0 [ 48.712392] ? __warn.cold+0x5/0x61 [ 48.716001] ? __warn+0xe4/0x200 [ 48.719464] ? debug_print_object+0x160/0x250 [ 48.723966] __warn.cold+0x20/0x61 [ 48.727523] ? debug_print_object+0x160/0x250 [ 48.732014] report_bug+0x262/0x2b0 [ 48.735660] do_error_trap+0x1d7/0x310 [ 48.739531] ? math_error+0x310/0x310 [ 48.743318] ? irq_work_claim+0xa6/0xc0 [ 48.747275] ? irq_work_queue+0x29/0x80 [ 48.751239] ? wake_up_klogd.part.0+0x8c/0xc0 [ 48.755728] ? trace_hardirqs_off_caller+0x69/0x210 [ 48.760744] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.765596] invalid_op+0x14/0x20 [ 48.769041] RIP: 0010:debug_print_object+0x160/0x250 [ 48.774128] 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 [ 48.793026] RSP: 0018:ffff888089d874d8 EFLAGS: 00010086 [ 48.798376] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 48.805646] RDX: 0000000000000000 RSI: ffffffff8154cf01 RDI: ffffed10113b0e8d [ 48.812904] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 48.820170] R10: 0000000000000005 R11: ffffffff8ad3601b R12: ffffffff88da08e0 [ 48.827440] R13: ffffffff815a2ad0 R14: ffff8880a43d2d28 R15: 1ffff110113b0ea6 [ 48.834712] ? calc_wheel_index+0x230/0x230 [ 48.839033] ? vprintk_func+0x81/0x17e [ 48.842928] ? debug_print_object+0x160/0x250 [ 48.847422] debug_object_assert_init+0x1f0/0x2e0 [ 48.852270] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 48.857358] ? debug_object_free+0x380/0x380 [ 48.861764] ? __queue_work+0x5f1/0x1100 [ 48.865813] del_timer+0x6d/0x100 [ 48.869270] ? run_timer_softirq+0x670/0x670 [ 48.873685] ? do_raw_spin_unlock+0x171/0x230 [ 48.878174] ? _raw_spin_unlock+0x29/0x40 [ 48.882315] ? trace_hardirqs_off+0x64/0x200 [ 48.886711] try_to_grab_pending+0x2b6/0x6f0 [ 48.891111] cancel_delayed_work+0x76/0x2c0 [ 48.895432] ? cancel_delayed_work_sync+0x20/0x20 [ 48.900275] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 48.904855] ? queue_delayed_work_on+0x122/0x200 [ 48.909602] l2cap_chan_del+0x53a/0x8e0 [ 48.913571] l2cap_chan_close+0x108/0x820 [ 48.917710] ? __set_monitor_timer+0x130/0x130 [ 48.922291] ? wait_for_completion_io+0x10/0x10 [ 48.926956] ? mark_held_locks+0xa6/0xf0 [ 48.931004] ? __local_bh_enable_ip+0x159/0x270 [ 48.935673] l2cap_sock_shutdown+0x85e/0xbd0 [ 48.940083] ? switch_task_namespaces+0xaa/0xc0 [ 48.944743] ? do_exit+0xbad/0x2b70 [ 48.948366] ? l2cap_skb_msg_name+0x120/0x120 [ 48.952861] ? exit_to_usermode_loop+0x204/0x2a0 [ 48.957606] ? do_syscall_64+0x538/0x620 [ 48.961653] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.967007] ? mark_held_locks+0xf0/0xf0 [ 48.971052] ? l2cap_sock_release+0x56/0x190 [ 48.975445] ? lock_downgrade+0x720/0x720 [ 48.979576] ? do_raw_write_lock+0xb8/0x1e0 [ 48.983891] l2cap_sock_release+0x63/0x190 [ 48.988131] __sock_release+0xcd/0x2a0 [ 48.992007] ? __sock_release+0x2a0/0x2a0 [ 48.996149] sock_close+0x15/0x20 [ 48.999586] __fput+0x2ce/0x890 [ 49.002856] task_work_run+0x148/0x1c0 [ 49.006729] do_exit+0xbb2/0x2b70 [ 49.010181] ? mark_held_locks+0xf0/0xf0 [ 49.014236] ? mm_update_next_owner+0x650/0x650 [ 49.018898] ? get_signal+0x388/0x1f70 [ 49.022777] ? lock_downgrade+0x720/0x720 [ 49.026917] ? lock_acquire+0x170/0x3c0 [ 49.030890] do_group_exit+0x125/0x310 [ 49.034778] get_signal+0x3f2/0x1f70 [ 49.038488] ? __local_bh_enable_ip+0x159/0x270 [ 49.043149] do_signal+0x8f/0x1670 [ 49.046673] ? l2cap_sock_accept+0x4d0/0x4d0 [ 49.051080] ? __local_bh_enable_ip+0x159/0x270 [ 49.055739] ? selinux_netlbl_socket_connect+0x2e/0x40 [ 49.061018] ? setup_sigcontext+0x820/0x820 [ 49.065329] ? l2cap_sock_accept+0x4d0/0x4d0 [ 49.069740] ? __ia32_sys_accept+0xb0/0xb0 [ 49.073977] ? up_read+0x17/0x110 [ 49.077429] ? __do_page_fault+0x1ca/0xde0 [ 49.081650] ? exit_to_usermode_loop+0x36/0x2a0 [ 49.086316] exit_to_usermode_loop+0x204/0x2a0 [ 49.090889] do_syscall_64+0x538/0x620 [ 49.094777] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.099963] RIP: 0033:0x446d69 [ 49.103148] Code: Bad RIP value. [ 49.106492] RSP: 002b:00007ffeeb6c7f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 49.114183] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446d69 [ 49.121483] RDX: 000000000000000e RSI: 0000000020000040 RDI: 0000000000000004 [ 49.128763] RBP: 00007ffeeb6c7f40 R08: 0000000000000000 R09: 00000000000000ff [ 49.136024] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004 [ 49.143297] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 49.151837] Kernel Offset: disabled [ 49.155508] Rebooting in 86400 seconds..