Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 63.112385] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 63.146588] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.214829] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 63.233007] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 63.250444] Bluetooth: Can't register HCI device [ 63.256318] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.265850] kobject_add_internal failed for hci3 (error: -2 parent: bluetooth) [ 63.286658] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.597249] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 63.600707] kobject_add_internal failed for hci3 (error: -2 parent: bluetooth) [ 63.617716] Bluetooth: Can't register HCI device [ 63.626720] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.959883] ------------[ cut here ]------------ [ 63.969027] refcount_t: underflow; use-after-free. [ 63.976749] WARNING: CPU: 0 PID: 8113 at lib/refcount.c:187 refcount_sub_and_test_checked+0x2c9/0x310 [ 63.986235] Kernel panic - not syncing: panic_on_warn set ... [ 63.992481] CPU: 0 PID: 8113 Comm: syz-executor161 Not tainted 4.20.0-rc7-next-20181224 #189 [ 64.001227] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.010834] Call Trace: [ 64.013549] dump_stack+0x1d3/0x2c6 [ 64.017171] ? dump_stack_print_info.cold.1+0x20/0x20 [ 64.022348] panic+0x2ad/0x632 [ 64.025521] ? add_taint.cold.5+0x16/0x16 [ 64.029667] ? __warn.cold.8+0x5/0x4f [ 64.033456] ? __warn+0xe8/0x1d0 [ 64.036852] ? refcount_sub_and_test_checked+0x2c9/0x310 [ 64.042416] __warn.cold.8+0x20/0x4f [ 64.046117] ? rcu_softirq_qs+0x20/0x20 [ 64.050080] ? refcount_sub_and_test_checked+0x2c9/0x310 [ 64.055515] report_bug+0x254/0x2d0 [ 64.059290] do_error_trap+0x11b/0x200 [ 64.063317] do_invalid_op+0x36/0x40 [ 64.067011] ? refcount_sub_and_test_checked+0x2c9/0x310 [ 64.072451] invalid_op+0x14/0x20 [ 64.076030] RIP: 0010:refcount_sub_and_test_checked+0x2c9/0x310 [ 64.082071] Code: 89 de e8 da 8d f0 fd 84 db 74 07 31 db e9 4d ff ff ff e8 fa 8c f0 fd 48 c7 c7 a0 fe 80 88 c6 05 df 91 a3 06 01 e8 77 c3 b9 fd <0f> 0b 31 db e9 2c ff ff ff 48 89 cf e8 f6 c8 34 fe e9 41 fe ff ff [ 64.101274] RSP: 0018:ffff88809656f6a0 EFLAGS: 00010282 [ 64.106621] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 64.113934] RDX: 0000000000000000 RSI: ffffffff81683f45 RDI: 0000000000000005 [ 64.121193] RBP: ffff88809656f788 R08: ffff88808edf8140 R09: ffffed1015cc5020 [ 64.128583] R10: ffffed1015cc5020 R11: ffff8880ae628107 R12: ffff8880a74df978 [ 64.135888] R13: 00000000ffffffff R14: ffff88809656f760 R15: ffff8880a55bfd20 [ 64.143452] ? vprintk_func+0x85/0x181 [ 64.147405] ? refcount_dec_if_one+0x180/0x180 [ 64.152095] ? do_raw_spin_unlock+0xa7/0x330 [ 64.156560] ? do_raw_spin_trylock+0x270/0x270 [ 64.161142] refcount_dec_and_test_checked+0x1a/0x20 [ 64.166232] kobject_put+0x6c/0xe0 [ 64.169898] kobj_kset_leave+0x25b/0x3f0 [ 64.173951] ? kasan_check_read+0x11/0x20 [ 64.178234] ? kobject_put+0xe0/0xe0 [ 64.182214] ? _raw_spin_unlock+0x2c/0x50 [ 64.186349] kobject_del.part.4+0x79/0xf0 [ 64.190481] kobject_del+0x1f/0x30 [ 64.194006] cleanup_glue_dir.part.21+0x1c2/0x210 [ 64.199073] ? device_create_file+0x1e0/0x1e0 [ 64.203906] device_del+0x802/0xb60 [ 64.207523] ? __device_links_no_driver+0x320/0x320 [ 64.212585] ? kobject_put+0x86/0xe0 [ 64.216302] hci_unregister_dev+0x3a2/0x990 [ 64.220618] ? hci_bdaddr_list_clear+0x2f0/0x2f0 [ 64.225360] ? ima_file_check+0x130/0x130 [ 64.229623] vhci_release+0x76/0xf0 [ 64.233241] __fput+0x3bc/0xa90 [ 64.236504] ? vhci_close_dev+0x50/0x50 [ 64.240460] ? file_free_rcu+0xe0/0xe0 [ 64.244335] ? trace_hardirqs_on+0xbd/0x310 [ 64.248769] ? kasan_check_read+0x11/0x20 [ 64.252909] ? task_work_run+0x1af/0x2a0 [ 64.256959] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 64.262396] ? filp_close+0x1cd/0x250 [ 64.266182] ____fput+0x15/0x20 [ 64.269455] task_work_run+0x1e8/0x2a0 [ 64.273328] ? task_work_cancel+0x240/0x240 [ 64.277643] ? copy_fd_bitmaps+0x210/0x210 [ 64.281879] ? do_syscall_64+0x9a/0x820 [ 64.285857] exit_to_usermode_loop+0x318/0x380 [ 64.290704] ? syscall_trace_enter+0x1260/0x1260 [ 64.295451] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.300985] do_syscall_64+0x6be/0x820 [ 64.304865] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 64.310216] ? syscall_return_slowpath+0x5e0/0x5e0 [ 64.315251] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 64.320206] ? trace_hardirqs_on_caller+0x310/0x310 [ 64.325205] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 64.330202] ? prepare_exit_to_usermode+0x291/0x3b0 [ 64.335201] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 64.340032] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.345207] RIP: 0033:0x400dd0 [ 64.348392] Code: 01 f0 ff ff 0f 83 b0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d fd 18 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 0a 00 00 c3 48 83 ec 08 e8 3a 01 00 00 [ 64.367479] RSP: 002b:00007fff8b53d6c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 64.375181] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400dd0 [ 64.382464] RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003 [ 64.389847] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 64.397112] R10: 00000000013f5880 R11: 0000000000000246 R12: 000000000000f9a8 [ 64.404574] R13: 0000000000401d70 R14: 0000000000000000 R15: 0000000000000000 [ 64.413618] Kernel Offset: disabled [ 64.419065] Rebooting in 86400 seconds..