[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.175' (ECDSA) to the list of known hosts. syzkaller login: [ 40.539989] IPVS: ftp: loaded support on port[0] = 21 executing program [ 42.585300] Bluetooth: hci0: command 0x0409 tx timeout [ 44.663639] Bluetooth: hci0: command 0x041b tx timeout [ 45.608008] ------------[ cut here ]------------ [ 45.613024] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 45.623463] WARNING: CPU: 0 PID: 8129 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 [ 45.632227] Kernel panic - not syncing: panic_on_warn set ... [ 45.632227] [ 45.639677] CPU: 0 PID: 8129 Comm: syz-executor387 Not tainted 4.19.189-syzkaller #0 [ 45.647568] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.657531] Call Trace: [ 45.660125] dump_stack+0x1fc/0x2ef [ 45.663771] panic+0x26a/0x50e [ 45.666972] ? __warn_printk+0xf3/0xf3 [ 45.670855] ? debug_print_object+0x160/0x250 [ 45.675352] ? __probe_kernel_read+0x130/0x1b0 [ 45.680074] ? __warn.cold+0x5/0x5a [ 45.683712] ? __warn+0xe4/0x200 [ 45.687080] ? debug_print_object+0x160/0x250 [ 45.691589] __warn.cold+0x20/0x5a [ 45.695159] ? debug_print_object+0x160/0x250 [ 45.699750] report_bug+0x262/0x2b0 [ 45.703380] do_error_trap+0x1d7/0x310 [ 45.707385] ? math_error+0x310/0x310 [ 45.711173] ? irq_work_claim+0xa6/0xc0 [ 45.715160] ? irq_work_queue+0x29/0x80 [ 45.719127] ? error_entry+0x72/0xd0 [ 45.722852] ? trace_hardirqs_off_caller+0x2c/0x210 [ 45.727890] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.732755] invalid_op+0x14/0x20 [ 45.736539] RIP: 0010:debug_print_object+0x160/0x250 [ 45.742012] Code: dd c0 e8 b3 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 e8 b3 88 48 c7 c7 e0 dc b3 88 e8 e0 8b 7a 04 <0f> 0b 83 05 e3 35 b0 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 45.760996] RSP: 0018:ffff88809535f4c8 EFLAGS: 00010082 [ 45.766353] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 45.773614] RDX: 0000000000000000 RSI: ffffffff814dde61 RDI: ffffed1012a6be8b [ 45.780900] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 45.788256] R10: 0000000000000005 R11: ffffffff8c66301b R12: ffffffff89f90980 [ 45.795529] R13: ffffffff8152f360 R14: ffff888094614da8 R15: 1ffff11012a6bea4 [ 45.803014] ? calc_wheel_index+0x230/0x230 [ 45.807355] ? vprintk_func+0x81/0x180 [ 45.811268] ? debug_print_object+0x160/0x250 [ 45.815765] debug_object_assert_init+0x1f0/0x2e0 [ 45.820882] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 45.826967] ? debug_object_free+0x380/0x380 [ 45.831406] ? __queue_work+0x5f1/0x1100 [ 45.835487] del_timer+0x6d/0x100 [ 45.838950] ? run_timer_softirq+0x670/0x670 [ 45.843349] ? do_raw_spin_unlock+0x171/0x230 [ 45.847847] ? _raw_spin_unlock+0x29/0x40 [ 45.852004] ? trace_hardirqs_off+0x64/0x200 [ 45.856444] try_to_grab_pending+0x2b6/0x6f0 [ 45.861480] cancel_delayed_work+0x76/0x2c0 [ 45.865878] ? cancel_delayed_work_sync+0x20/0x20 [ 45.870724] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 45.875301] ? queue_delayed_work_on+0x122/0x200 [ 45.880052] l2cap_chan_del+0x5b4/0xa50 [ 45.884047] l2cap_chan_close+0x1b5/0x950 [ 45.888194] ? __set_monitor_timer+0x200/0x200 [ 45.892787] ? wait_for_completion_io+0x10/0x10 [ 45.898025] ? mark_held_locks+0xa6/0xf0 [ 45.902090] ? __local_bh_enable_ip+0x159/0x270 [ 45.906781] l2cap_sock_shutdown+0x339/0xe10 [ 45.911217] ? l2cap_sock_getname+0x510/0x510 [ 45.915720] ? get_signal+0x3f2/0x1f70 [ 45.919619] ? do_signal+0x8f/0x1670 [ 45.923334] ? exit_to_usermode_loop+0x204/0x2a0 [ 45.928095] ? do_syscall_64+0x538/0x620 [ 45.932149] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.937522] ? l2cap_sock_release+0x6a/0x290 [ 45.941958] ? lock_downgrade+0x720/0x720 [ 45.946565] ? do_raw_write_lock+0xb8/0x1e0 [ 45.950917] l2cap_sock_release+0x77/0x290 [ 45.955162] __sock_release+0xcd/0x2a0 [ 45.959069] ? __sock_release+0x2a0/0x2a0 [ 45.963227] sock_close+0x15/0x20 [ 45.966705] __fput+0x2ce/0x890 [ 45.969997] task_work_run+0x148/0x1c0 [ 45.973884] do_exit+0xbf3/0x2be0 [ 45.977347] ? mark_held_locks+0xf0/0xf0 [ 45.981433] ? mm_update_next_owner+0x650/0x650 [ 45.986104] ? get_signal+0x388/0x1f70 [ 45.989985] ? lock_downgrade+0x720/0x720 [ 45.994139] ? lock_acquire+0x170/0x3c0 [ 45.998213] do_group_exit+0x125/0x310 [ 46.002099] get_signal+0x3f2/0x1f70 [ 46.005803] ? __local_bh_enable_ip+0x159/0x270 [ 46.010461] do_signal+0x8f/0x1670 [ 46.013993] ? l2cap_sock_accept+0x550/0x550 [ 46.018407] ? __might_fault+0x192/0x1d0 [ 46.022496] ? setup_sigcontext+0x820/0x820 [ 46.026851] ? l2cap_sock_accept+0x550/0x550 [ 46.031269] ? __ia32_sys_accept+0xb0/0xb0 [ 46.035521] ? up_read+0x17/0x110 [ 46.039239] ? __do_page_fault+0x180/0xd60 [ 46.043481] ? exit_to_usermode_loop+0x36/0x2a0 [ 46.048159] exit_to_usermode_loop+0x204/0x2a0 [ 46.052753] do_syscall_64+0x538/0x620 [ 46.056648] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.061850] RIP: 0033:0x445fe9 [ 46.065058] Code: Bad RIP value. [ 46.068418] RSP: 002b:00007ffc22ec1b38 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 46.076123] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000445fe9 [ 46.083504] RDX: 0000000000000004 RSI: 00000000200000c0 RDI: 0000000000000004 [ 46.090884] RBP: 0000000000000003 R08: 000000ff00000001 R09: 000000ff00000001 [ 46.098165] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000011022b8 [ 46.105450] R13: 0000000000000072 R14: 00007ffc22ec1b90 R15: 0000000000000003 [ 46.113619] Kernel Offset: disabled [ 46.118813] Rebooting in 86400 seconds..