[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 26.856497] kauditd_printk_skb: 8 callbacks suppressed [ 26.856511] audit: type=1800 audit(1541168528.969:29): pid=5544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.883203] audit: type=1800 audit(1541168528.969:30): pid=5544 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.33' (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 syzkaller login: [ 40.309214] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) [ 40.346266] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program [ 40.397772] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program executing program executing program [ 40.450096] 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 [ 40.782406] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) [ 40.782573] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 40.810272] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 40.840478] 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 [ 41.113304] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 41.148996] 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 [ 41.348772] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 41.368956] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 41.380922] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program [ 41.395579] 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 [ 41.526945] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 41.559928] 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 [ 41.806335] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 41.820013] 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 [ 42.182836] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 42.201944] 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 [ 42.354252] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 42.372718] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.482122] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 43.499377] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 44.230904] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 44.245709] 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 [ 44.294037] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 44.312473] 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 [ 44.648239] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program [ 44.691691] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 44.727695] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 44.743867] Bluetooth: Can't register HCI device [ 44.763861] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program executing program executing program executing program [ 44.786571] 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 [ 45.197547] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 45.221420] kobject_add_internal failed for hci3 (error: -2 parent: bluetooth) [ 45.239984] Bluetooth: Can't register HCI device executing program executing program executing program executing program executing program executing program [ 45.246814] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 45.915945] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 45.946850] 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 [ 46.052447] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 46.083403] Bluetooth: Can't register HCI device executing program executing program executing program executing program [ 46.095798] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 46.127419] 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 [ 46.172504] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 46.172632] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 46.200949] Bluetooth: Can't register HCI device [ 46.211345] 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 [ 46.526979] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 46.540479] 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 [ 46.785749] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 46.799919] Bluetooth: Can't register HCI device [ 46.814467] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) executing program executing program executing program executing program [ 46.836185] 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 [ 46.859284] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 46.877023] 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 [ 47.051373] kobject_add_internal failed for hci0 (error: -2 parent: bluetooth) [ 47.052082] kobject_add_internal failed for hci3 (error: -2 parent: bluetooth) [ 47.069903] Bluetooth: Can't register HCI device [ 47.081206] 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 [ 47.533366] ------------[ cut here ]------------ [ 47.542077] refcount_t: underflow; use-after-free. [ 47.547920] WARNING: CPU: 1 PID: 7046 at lib/refcount.c:187 refcount_sub_and_test_checked+0x2c9/0x310 [ 47.557297] Kernel panic - not syncing: panic_on_warn set ... [ 47.563196] CPU: 1 PID: 7046 Comm: syz-executor895 Not tainted 4.19.0+ #315 [ 47.570313] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.579700] Call Trace: [ 47.582308] dump_stack+0x244/0x39d [ 47.585959] ? dump_stack_print_info.cold.1+0x20/0x20 [ 47.591179] panic+0x2ad/0x55c [ 47.594392] ? add_taint.cold.5+0x16/0x16 [ 47.598570] ? __warn.cold.8+0x5/0x45 [ 47.602415] ? __warn+0xe8/0x1d0 [ 47.605806] ? refcount_sub_and_test_checked+0x2c9/0x310 [ 47.611274] __warn.cold.8+0x20/0x45 [ 47.614997] ? rcu_softirq_qs+0x20/0x20 [ 47.618993] ? refcount_sub_and_test_checked+0x2c9/0x310 [ 47.624464] report_bug+0x254/0x2d0 [ 47.628142] do_error_trap+0x11b/0x200 [ 47.632062] do_invalid_op+0x36/0x40 [ 47.635801] ? refcount_sub_and_test_checked+0x2c9/0x310 [ 47.641266] invalid_op+0x14/0x20 [ 47.644737] RIP: 0010:refcount_sub_and_test_checked+0x2c9/0x310 [ 47.650805] Code: 89 de e8 0a 87 ed fd 84 db 74 07 31 db e9 4d ff ff ff e8 2a 86 ed fd 48 c7 c7 20 9d 60 88 c6 05 85 5e 7f 06 01 e8 c7 e6 b6 fd <0f> 0b 31 db e9 2c ff ff ff 48 89 cf e8 56 cd 30 fe e9 41 fe ff ff [ 47.669738] RSP: 0018:ffff8801bcdd76a8 EFLAGS: 00010286 [ 47.675114] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 47.682395] RDX: 0000000000000000 RSI: ffffffff8165d6c5 RDI: 0000000000000005 [ 47.689676] RBP: ffff8801bcdd7790 R08: ffff8801bcb98700 R09: ffffed003b5e5020 [ 47.696957] R10: ffffed003b5e5020 R11: ffff8801daf28107 R12: ffff8801d72459b8 [ 47.704239] R13: 00000000ffffffff R14: ffff8801bcdd7768 R15: ffff8801bcdfa620 [ 47.711539] ? vprintk_func+0x85/0x181 [ 47.715538] ? refcount_sub_and_test_checked+0x2c9/0x310 [ 47.721022] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 47.726499] ? do_raw_spin_unlock+0xa7/0x330 [ 47.730927] ? do_raw_spin_trylock+0x270/0x270 [ 47.735525] refcount_dec_and_test_checked+0x1a/0x20 [ 47.740651] kobject_put+0x6c/0xe0 [ 47.744213] kobj_kset_leave+0x25b/0x3f0 [ 47.748291] ? kasan_check_read+0x11/0x20 [ 47.752458] ? kobject_put+0xe0/0xe0 [ 47.756201] ? _raw_spin_unlock+0x2c/0x50 [ 47.760368] kobject_del.part.4+0x79/0xf0 [ 47.764543] kobject_del+0x1f/0x30 [ 47.768223] cleanup_glue_dir.part.19+0x1c2/0x210 [ 47.773089] ? device_create_file+0x1e0/0x1e0 [ 47.777614] device_del+0x813/0xb70 [ 47.781264] ? __device_links_no_driver+0x320/0x320 [ 47.786297] ? kobject_put+0x86/0xe0 [ 47.790029] hci_unregister_dev+0x3a2/0x990 [ 47.794385] ? hci_bdaddr_list_clear+0x2f0/0x2f0 [ 47.799157] ? ima_file_check+0x130/0x130 [ 47.803326] ? vhci_close_dev+0x50/0x50 [ 47.807313] vhci_release+0x76/0xf0 [ 47.810978] __fput+0x385/0xa30 [ 47.814280] ? get_max_files+0x20/0x20 [ 47.818183] ? trace_hardirqs_on+0xbd/0x310 [ 47.822518] ? kasan_check_read+0x11/0x20 [ 47.826687] ? task_work_run+0x1af/0x2a0 [ 47.830763] ? trace_hardirqs_off_caller+0x310/0x310 [ 47.835885] ? filp_close+0x1cd/0x250 [ 47.839708] ____fput+0x15/0x20 [ 47.842999] task_work_run+0x1e8/0x2a0 [ 47.846898] ? task_work_cancel+0x240/0x240 [ 47.851246] ? copy_fd_bitmaps+0x210/0x210 [ 47.855493] ? do_syscall_64+0x9a/0x820 [ 47.859485] exit_to_usermode_loop+0x318/0x380 [ 47.864094] ? __bpf_trace_sys_exit+0x30/0x30 [ 47.868610] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.874182] do_syscall_64+0x6be/0x820 [ 47.878097] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.883479] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.888421] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.893291] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.898353] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.903383] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.908419] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.913286] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.918489] RIP: 0033:0x400dd0 [ 47.921691] 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 [ 47.940598] RSP: 002b:00007ffc5caf19d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 47.948368] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400dd0 [ 47.955651] RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003 [ 47.962929] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 47.970204] R10: 0000000000b0c880 R11: 0000000000000246 R12: 000000000000b95f [ 47.977481] R13: 0000000000401d70 R14: 0000000000000000 R15: 0000000000000000 [ 47.985739] Kernel Offset: disabled [ 47.989440] Rebooting in 86400 seconds..