[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.0.241' (ECDSA) to the list of known hosts. syzkaller login: [ 58.831725][ T6858] IPVS: ftp: loaded support on port[0] = 21 executing program [ 61.981874][ T2595] Bluetooth: hci0: command 0x0409 tx timeout [ 64.061188][ T17] Bluetooth: hci0: command 0x041b tx timeout [ 64.936013][ T6888] ------------[ cut here ]------------ [ 64.941736][ T6888] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0 [ 64.951862][ T6888] WARNING: CPU: 1 PID: 6888 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 64.961380][ T6888] Kernel panic - not syncing: panic_on_warn set ... [ 64.967965][ T6888] CPU: 1 PID: 6888 Comm: syz-executor736 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 64.977833][ T6888] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.987873][ T6888] Call Trace: [ 64.991156][ T6888] dump_stack+0x18f/0x20d [ 64.995474][ T6888] panic+0x2e3/0x75c [ 64.999350][ T6888] ? __warn_printk+0xf3/0xf3 [ 65.003929][ T6888] ? __warn.cold+0x5/0x4a [ 65.008240][ T6888] ? __warn+0xd6/0x1f2 [ 65.012306][ T6888] ? debug_print_object+0x160/0x250 [ 65.017517][ T6888] __warn.cold+0x20/0x4a [ 65.021775][ T6888] ? debug_print_object+0x160/0x250 [ 65.026992][ T6888] report_bug+0x1bd/0x210 [ 65.031335][ T6888] handle_bug+0x38/0x90 [ 65.035503][ T6888] ? __warn_printk+0xc6/0xf3 [ 65.040102][ T6888] exc_invalid_op+0x14/0x40 [ 65.044614][ T6888] asm_exc_invalid_op+0x12/0x20 [ 65.049475][ T6888] RIP: 0010:debug_print_object+0x160/0x250 [ 65.055286][ T6888] Code: dd 60 16 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 16 94 88 48 c7 c7 c0 0b 94 88 e8 92 36 a6 fd <0f> 0b 83 05 b3 d2 1a 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 65.074899][ T6888] RSP: 0018:ffffc90000edf570 EFLAGS: 00010086 [ 65.080987][ T6888] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 65.088973][ T6888] RDX: ffff888094f20040 RSI: ffffffff815d86e7 RDI: fffff520001dbea0 [ 65.096947][ T6888] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae720f8b [ 65.104937][ T6888] R10: 0000000000000000 R11: 203a47554245444f R12: ffffffff89c5e220 [ 65.112936][ T6888] R13: ffffffff81639390 R14: ffff8880a71cf200 R15: 1ffff920001dbeb9 [ 65.121015][ T6888] ? calc_wheel_index+0x3f0/0x3f0 [ 65.126052][ T6888] ? vprintk_func+0x97/0x1a6 [ 65.130628][ T6888] debug_object_assert_init+0x1f4/0x2e0 [ 65.136394][ T6888] ? find_held_lock+0x2d/0x110 [ 65.141487][ T6888] ? debug_object_init_on_stack+0x20/0x20 [ 65.147196][ T6888] ? __queue_work+0x61a/0xf20 [ 65.151858][ T6888] ? lock_downgrade+0x830/0x830 [ 65.156693][ T6888] del_timer+0x6d/0x110 [ 65.160846][ T6888] ? detach_if_pending+0x4d0/0x4d0 [ 65.165955][ T6888] ? __queue_work+0x63c/0xf20 [ 65.170623][ T6888] ? lockdep_hardirqs_off+0x7e/0xb0 [ 65.175806][ T6888] ? trace_hardirqs_off+0x76/0x210 [ 65.180934][ T6888] cancel_delayed_work+0xe0/0x450 [ 65.186269][ T6888] ? mod_delayed_work_on+0x2e0/0x2e0 [ 65.191538][ T6888] ? lockdep_hardirqs_on+0x76/0xf0 [ 65.196663][ T6888] ? queue_delayed_work_on+0x12f/0x210 [ 65.202124][ T6888] l2cap_chan_del+0x541/0x1300 [ 65.206879][ T6888] l2cap_chan_close+0x118/0xb10 [ 65.211725][ T6888] ? l2cap_retransmit_all+0x760/0x760 [ 65.217076][ T6888] ? __mutex_unlock_slowpath+0xe2/0x610 [ 65.222659][ T6888] ? mark_held_locks+0x9f/0xe0 [ 65.227400][ T6888] ? wait_for_completion+0x260/0x260 [ 65.232667][ T6888] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 65.238667][ T6888] ? l2cap_sock_shutdown+0x2c4/0xe90 [ 65.243933][ T6888] ? trace_hardirqs_on+0x5f/0x220 [ 65.248938][ T6888] l2cap_sock_shutdown+0x3b8/0xe90 [ 65.254052][ T6888] ? lock_acquire+0x1f1/0xad0 [ 65.258726][ T6888] ? bt_sock_unlink+0x1d/0x1c0 [ 65.263471][ T6888] ? l2cap_sock_suspend_cb+0x80/0x80 [ 65.268753][ T6888] ? find_held_lock+0x2d/0x110 [ 65.273515][ T6888] ? l2cap_sock_release+0x56/0x1d0 [ 65.279475][ T6888] ? lock_downgrade+0x830/0x830 [ 65.284307][ T6888] ? do_raw_read_unlock+0x70/0x70 [ 65.289312][ T6888] l2cap_sock_release+0x63/0x1d0 [ 65.294241][ T6888] __sock_release+0xcd/0x280 [ 65.299592][ T6888] sock_close+0x18/0x20 [ 65.303727][ T6888] __fput+0x285/0x920 [ 65.307688][ T6888] ? __sock_release+0x280/0x280 [ 65.312522][ T6888] task_work_run+0xdd/0x190 [ 65.317019][ T6888] do_exit+0xb7d/0x29f0 [ 65.321159][ T6888] ? lock_acquire+0x1f1/0xad0 [ 65.325816][ T6888] ? find_held_lock+0x2d/0x110 [ 65.330593][ T6888] ? mm_update_next_owner+0x7a0/0x7a0 [ 65.335968][ T6888] ? get_signal+0x332/0x1ee0 [ 65.340556][ T6888] ? lock_downgrade+0x830/0x830 [ 65.345401][ T6888] ? lock_is_held_type+0xbb/0xf0 [ 65.350320][ T6888] do_group_exit+0x125/0x310 [ 65.354895][ T6888] get_signal+0x40b/0x1ee0 [ 65.359352][ T6888] ? lockdep_hardirqs_on+0x76/0xf0 [ 65.364446][ T6888] ? __local_bh_enable_ip+0xd1/0x190 [ 65.369711][ T6888] ? l2cap_sock_connect+0x379/0x690 [ 65.374894][ T6888] arch_do_signal+0x82/0x2520 [ 65.379616][ T6888] ? l2cap_sock_recv_cb+0x1e0/0x1e0 [ 65.384799][ T6888] ? __sys_connect_file+0x4e/0x1a0 [ 65.389888][ T6888] ? copy_siginfo_to_user32+0xa0/0xa0 [ 65.395244][ T6888] ? __sys_connect+0x109/0x190 [ 65.399999][ T6888] ? __sys_connect_file+0x1a0/0x1a0 [ 65.405188][ T6888] ? exit_to_user_mode_prepare+0xb9/0x1c0 [ 65.410887][ T6888] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 65.416861][ T6888] exit_to_user_mode_prepare+0x15d/0x1c0 [ 65.422481][ T6888] syscall_exit_to_user_mode+0x59/0x2b0 [ 65.428006][ T6888] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.433879][ T6888] RIP: 0033:0x446dc9 [ 65.437748][ T6888] Code: Bad RIP value. [ 65.441810][ T6888] RSP: 002b:00007ffe4d5f26b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 65.450203][ T6888] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446dc9 [ 65.458180][ T6888] RDX: 000000000000000e RSI: 0000000020000040 RDI: 0000000000000004 [ 65.466150][ T6888] RBP: 00007ffe4d5f26f0 R08: 0000000000000000 R09: 00000000000000ff [ 65.474118][ T6888] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000004 [ 65.482075][ T6888] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 65.491729][ T6888] Kernel Offset: disabled [ 65.496259][ T6888] Rebooting in 86400 seconds..