[ 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 '10.128.10.37' (ECDSA) to the list of known hosts. syzkaller login: [ 37.097201] IPVS: ftp: loaded support on port[0] = 21 executing program [ 39.138067] Bluetooth: hci0: command 0x0409 tx timeout [ 41.216708] Bluetooth: hci0: command 0x041b tx timeout [ 42.154413] ------------[ cut here ]------------ [ 42.159328] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 42.169589] WARNING: CPU: 1 PID: 8165 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 [ 42.178319] Kernel panic - not syncing: panic_on_warn set ... [ 42.178319] [ 42.185712] CPU: 1 PID: 8165 Comm: syz-executor942 Not tainted 4.19.163-syzkaller #0 [ 42.193570] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.202904] Call Trace: [ 42.205476] dump_stack+0x1fc/0x2fe [ 42.209090] panic+0x26a/0x50e [ 42.212279] ? __warn_printk+0xf3/0xf3 [ 42.216164] ? debug_print_object+0x160/0x250 [ 42.220653] ? __probe_kernel_read+0x130/0x1b0 [ 42.225303] ? __warn.cold+0x5/0x61 [ 42.228925] ? __warn+0xe4/0x200 [ 42.232275] ? debug_print_object+0x160/0x250 [ 42.236755] __warn.cold+0x20/0x61 [ 42.240286] ? debug_print_object+0x160/0x250 [ 42.244766] report_bug+0x262/0x2b0 [ 42.248387] do_error_trap+0x1d7/0x310 [ 42.252324] ? math_error+0x310/0x310 [ 42.256113] ? irq_work_claim+0xa6/0xc0 [ 42.260084] ? irq_work_queue+0x29/0x80 [ 42.264055] ? error_entry+0x72/0xd0 [ 42.267756] ? trace_hardirqs_off_caller+0x2c/0x210 [ 42.272938] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.278303] invalid_op+0x14/0x20 [ 42.281746] RIP: 0010:debug_print_object+0x160/0x250 [ 42.286830] Code: dd e0 ca b3 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd e0 ca b3 88 48 c7 c7 00 bf b3 88 e8 fb 80 b8 fd <0f> 0b 83 05 23 b6 a6 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 42.305740] RSP: 0018:ffff88809429f4c0 EFLAGS: 00010086 [ 42.311088] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 42.318355] RDX: 0000000000000000 RSI: ffffffff814fdbb1 RDI: ffffed1012853e8a [ 42.325603] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 42.332854] R10: 0000000000000005 R11: ffffffff8c65b05b R12: ffffffff89f90700 [ 42.340118] R13: ffffffff81554330 R14: ffff8880b24f8ba8 R15: 1ffff11012853ea3 [ 42.347378] ? calc_wheel_index+0x230/0x230 [ 42.351700] ? vprintk_func+0x81/0x17e [ 42.355580] debug_object_assert_init+0x1f0/0x2e0 [ 42.360405] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 42.365488] ? debug_object_free+0x380/0x380 [ 42.369880] ? __queue_work+0x5f1/0x1100 [ 42.373926] del_timer+0x6d/0x100 [ 42.377360] ? run_timer_softirq+0x670/0x670 [ 42.381751] ? do_raw_spin_unlock+0x171/0x230 [ 42.386231] ? _raw_spin_unlock+0x29/0x40 [ 42.390357] ? trace_hardirqs_off+0x64/0x200 [ 42.394746] try_to_grab_pending+0x2b6/0x6f0 [ 42.399152] cancel_delayed_work+0x76/0x2c0 [ 42.403466] ? cancel_delayed_work_sync+0x20/0x20 [ 42.408301] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 42.412884] ? queue_delayed_work_on+0x122/0x200 [ 42.417636] l2cap_chan_del+0x5b4/0xa50 [ 42.421598] l2cap_chan_close+0x1b5/0x950 [ 42.425727] ? __set_monitor_timer+0x200/0x200 [ 42.430302] ? wait_for_completion_io+0x10/0x10 [ 42.434951] ? mark_held_locks+0xa6/0xf0 [ 42.438995] ? __local_bh_enable_ip+0x159/0x270 [ 42.443688] l2cap_sock_shutdown+0x339/0xe10 [ 42.448081] ? l2cap_sock_getname+0x510/0x510 [ 42.452556] ? get_signal+0x3f2/0x1f70 [ 42.456509] ? do_signal+0x8f/0x1670 [ 42.460203] ? exit_to_usermode_loop+0x204/0x2a0 [ 42.464934] ? do_syscall_64+0x538/0x620 [ 42.468974] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.474318] ? l2cap_sock_release+0x6a/0x290 [ 42.478708] ? lock_downgrade+0x720/0x720 [ 42.482855] ? do_raw_write_lock+0xb8/0x1e0 [ 42.487178] l2cap_sock_release+0x77/0x290 [ 42.491397] __sock_release+0xcd/0x2a0 [ 42.495265] ? __sock_release+0x2a0/0x2a0 [ 42.499411] sock_close+0x15/0x20 [ 42.502852] __fput+0x2ce/0x890 [ 42.506122] task_work_run+0x148/0x1c0 [ 42.509994] do_exit+0xbed/0x2be0 [ 42.513503] ? mark_held_locks+0xf0/0xf0 [ 42.517592] ? mm_update_next_owner+0x650/0x650 [ 42.522266] ? get_signal+0x388/0x1f70 [ 42.526201] ? lock_downgrade+0x720/0x720 [ 42.530348] ? lock_acquire+0x170/0x3c0 [ 42.534308] do_group_exit+0x125/0x310 [ 42.540352] get_signal+0x3f2/0x1f70 [ 42.544051] ? __local_bh_enable_ip+0x159/0x270 [ 42.548707] do_signal+0x8f/0x1670 [ 42.552243] ? l2cap_sock_accept+0x550/0x550 [ 42.556633] ? __might_fault+0x192/0x1d0 [ 42.560674] ? setup_sigcontext+0x820/0x820 [ 42.564992] ? l2cap_sock_accept+0x550/0x550 [ 42.569393] ? __ia32_sys_accept+0xb0/0xb0 [ 42.573626] ? up_read+0x17/0x110 [ 42.577059] ? __do_page_fault+0x180/0xd60 [ 42.581277] ? exit_to_usermode_loop+0x36/0x2a0 [ 42.585933] exit_to_usermode_loop+0x204/0x2a0 [ 42.590540] do_syscall_64+0x538/0x620 [ 42.594420] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.599599] RIP: 0033:0x446e49 [ 42.602793] Code: Bad RIP value. [ 42.606207] RSP: 002b:00007fff690800a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 42.613930] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446e49 [ 42.621195] RDX: 0000000000000007 RSI: 0000000020000100 RDI: 0000000000000004 [ 42.628446] RBP: 0000000000000003 R08: 00000000000000ff R09: 00000000000000ff [ 42.635696] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000fc5850 [ 42.642943] R13: 0000000000000072 R14: 0000000000000000 R15: 0000000000000000 [ 42.651064] Kernel Offset: disabled [ 42.654735] Rebooting in 86400 seconds..