[  OK  ] Started Getty on tty2.
[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts.
syzkaller login: [   42.107520][ T6809] IPVS: ftp: loaded support on port[0] = 21
executing program
[   45.279824][ T2567] Bluetooth: hci0: command 0x0409 tx timeout
[   47.358441][   T45] Bluetooth: hci0: command 0x041b tx timeout
[   48.237129][ T6841] ------------[ cut here ]------------
[   48.242774][ T6841] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0
[   48.252580][ T6841] WARNING: CPU: 1 PID: 6841 at lib/debugobjects.c:488 debug_object_assert_init+0x1fa/0x250
[   48.262533][ T6841] Kernel panic - not syncing: panic_on_warn set ...
[   48.269096][ T6841] CPU: 1 PID: 6841 Comm: syz-executor991 Not tainted 5.8.0-rc7-syzkaller #0
[   48.277736][ T6841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.287768][ T6841] Call Trace:
[   48.291058][ T6841]  dump_stack+0x1f0/0x31e
[   48.295365][ T6841]  panic+0x264/0x7a0
[   48.299238][ T6841]  ? __warn+0x102/0x250
[   48.303369][ T6841]  ? debug_object_assert_init+0x1fa/0x250
[   48.309066][ T6841]  ? debug_object_assert_init+0x1fa/0x250
[   48.314811][ T6841]  __warn+0x227/0x250
[   48.318773][ T6841]  ? debug_object_assert_init+0x1fa/0x250
[   48.324477][ T6841]  report_bug+0x1b1/0x2e0
[   48.328783][ T6841]  handle_bug+0x42/0x80
[   48.332916][ T6841]  exc_invalid_op+0x16/0x40
[   48.337401][ T6841]  asm_exc_invalid_op+0x12/0x20
[   48.342240][ T6841] RIP: 0010:debug_object_assert_init+0x1fa/0x250
[   48.348601][ T6841] Code: e8 ab ec 11 fe 4c 8b 45 00 48 c7 c7 0f b7 14 89 48 c7 c6 09 b6 14 89 48 c7 c2 22 30 2c 89 31 c9 49 89 d9 31 c0 e8 16 9e a4 fd <0f> 0b ff 05 02 ca eb 05 48 83 c5 38 48 89 e8 48 c1 e8 03 42 80 3c
[   48.368182][ T6841] RSP: 0018:ffffc90001647828 EFLAGS: 00010046
[   48.374223][ T6841] RAX: d7584e27544dfa00 RBX: 0000000000000000 RCX: ffff888091ce0180
[   48.382168][ T6841] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[   48.390124][ T6841] RBP: ffffffff894edb20 R08: ffffffff815dd389 R09: ffffed1015d241c3
[   48.398080][ T6841] R10: ffffed1015d241c3 R11: 0000000000000000 R12: dffffc0000000000
[   48.406026][ T6841] R13: ffff8880a35a4200 R14: 0000000000000002 R15: ffffffff8b9ad4a0
[   48.413990][ T6841]  ? vprintk_emit+0x339/0x3c0
[   48.418651][ T6841]  ? debug_object_assert_init+0x1fa/0x250
[   48.424346][ T6841]  del_timer+0x2f/0x340
[   48.428477][ T6841]  ? trace_lock_release+0x137/0x1a0
[   48.433650][ T6841]  ? trace_irq_disable_rcuidle+0x1f/0x1c0
[   48.439349][ T6841]  try_to_grab_pending+0xba/0x9f0
[   48.444350][ T6841]  ? lockdep_hardirqs_on_prepare+0x425/0x6e0
[   48.450308][ T6841]  cancel_delayed_work+0x37/0x2b0
[   48.455315][ T6841]  l2cap_chan_del+0x5bf/0x760
[   48.459967][ T6841]  l2cap_chan_close+0x7bf/0xae0
[   48.464791][ T6841]  l2cap_sock_shutdown+0x39f/0x700
[   48.469877][ T6841]  l2cap_sock_release+0x63/0x190
[   48.474787][ T6841]  sock_close+0xd8/0x260
[   48.479009][ T6841]  ? sock_mmap+0x90/0x90
[   48.483221][ T6841]  __fput+0x2f0/0x750
[   48.487183][ T6841]  task_work_run+0x137/0x1c0
[   48.491789][ T6841]  do_exit+0x601/0x1f80
[   48.495924][ T6841]  do_group_exit+0x161/0x2d0
[   48.500489][ T6841]  get_signal+0x139b/0x1d30
[   48.504985][ T6841]  ? l2cap_sock_connect+0x505/0x690
[   48.510165][ T6841]  do_signal+0x33/0x610
[   48.514304][ T6841]  ? __prepare_exit_to_usermode+0x81/0x1e0
[   48.520082][ T6841]  __prepare_exit_to_usermode+0xd7/0x1e0
[   48.525684][ T6841]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   48.531720][ T6841]  do_syscall_64+0x7f/0xe0
[   48.536122][ T6841]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   48.541987][ T6841] RIP: 0033:0x446d69
[   48.545847][ T6841] Code: Bad RIP value.
[   48.549888][ T6841] RSP: 002b:00007fff957d9718 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[   48.558270][ T6841] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446d69
[   48.566212][ T6841] RDX: 000000000000000e RSI: 0000000020000000 RDI: 0000000000000004
[   48.574160][ T6841] RBP: 00007fff957d9750 R08: 0000000000000000 R09: 00000000000000ff
[   48.582105][ T6841] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004
[   48.590168][ T6841] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   48.598894][ T6841] Kernel Offset: disabled
[   48.603260][ T6841] Rebooting in 86400 seconds..