[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.095243][ T27] audit: type=1800 audit(1561948014.563:25): pid=8259 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 51.115344][ T27] audit: type=1800 audit(1561948014.563:26): pid=8259 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 51.233953][ T27] audit: type=1800 audit(1561948014.703:27): pid=8259 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. syzkaller login: [ 61.094205][ T8419] IPVS: ftp: loaded support on port[0] = 21 [ 61.094211][ T8423] IPVS: ftp: loaded support on port[0] = 21 [ 61.107964][ T8424] IPVS: ftp: loaded support on port[0] = 21 [ 61.116945][ T8426] IPVS: ftp: loaded support on port[0] = 21 [ 61.125082][ T8425] IPVS: ftp: loaded support on port[0] = 21 [ 61.129984][ T8427] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 63.381575][ T8962] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 63.410146][ T8962] 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 [ 64.196397][ T9147] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 64.212419][ T9147] 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 [ 65.186581][ T9377] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) [ 65.219833][ T9377] 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 [ 65.521052][ T9465] ------------[ cut here ]------------ [ 65.530961][ T9465] refcount_t: increment on 0; use-after-free. [ 65.537411][ T9465] WARNING: CPU: 0 PID: 9465 at lib/refcount.c:156 refcount_inc_checked+0x61/0x70 [ 65.546523][ T9465] Kernel panic - not syncing: panic_on_warn set ... [ 65.553118][ T9465] CPU: 0 PID: 9465 Comm: syz-executor846 Not tainted 5.2.0-rc7 #46 [ 65.561016][ T9465] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.571506][ T9465] Call Trace: [ 65.574811][ T9465] dump_stack+0x172/0x1f0 [ 65.579163][ T9465] ? refcount_inc_not_zero_checked+0x190/0x200 [ 65.585333][ T9465] panic+0x2cb/0x744 [ 65.589243][ T9465] ? __warn_printk+0xf3/0xf3 [ 65.593848][ T9465] ? refcount_inc_checked+0x61/0x70 [ 65.599060][ T9465] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.605310][ T9465] ? __warn.cold+0x5/0x4d [ 65.610085][ T9465] ? __warn+0xe8/0x1d0 [ 65.614168][ T9465] ? refcount_inc_checked+0x61/0x70 [ 65.619388][ T9465] __warn.cold+0x20/0x4d [ 65.623642][ T9465] ? refcount_inc_checked+0x61/0x70 [ 65.628850][ T9465] report_bug+0x263/0x2b0 [ 65.633190][ T9465] do_error_trap+0x11b/0x200 [ 65.637797][ T9465] do_invalid_op+0x37/0x50 [ 65.642220][ T9465] ? refcount_inc_checked+0x61/0x70 [ 65.647425][ T9465] invalid_op+0x14/0x20 [ 65.651591][ T9465] RIP: 0010:refcount_inc_checked+0x61/0x70 [ 65.657402][ T9465] Code: 1d de 5a 48 06 31 ff 89 de e8 cb 53 3c fe 84 db 75 dd e8 82 52 3c fe 48 c7 c7 20 9d a4 87 c6 05 be 5a 48 06 01 e8 9d 8b 0e fe <0f> 0b eb c1 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 [ 65.677099][ T9465] RSP: 0018:ffff88809b71f8f8 EFLAGS: 00010286 [ 65.683157][ T9465] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 65.691117][ T9465] RDX: 0000000000000000 RSI: ffffffff815adb36 RDI: ffffed10136e3f11 [ 65.699076][ T9465] RBP: ffff88809b71f908 R08: ffff8880997b64c0 R09: ffffed1015d040f1 [ 65.707038][ T9465] R10: ffffed1015d040f0 R11: ffff8880ae820787 R12: ffff8880a75df538 [ 65.715005][ T9465] R13: ffff88808f4dcea0 R14: ffff88808f4dce98 R15: ffff8880a75df4b8 [ 65.722995][ T9465] ? vprintk_func+0x86/0x189 [ 65.727585][ T9465] ? refcount_inc_checked+0x61/0x70 [ 65.732768][ T9465] kobject_get+0x66/0xc0 [ 65.737011][ T9465] kobject_add_internal+0x14f/0x380 [ 65.742200][ T9465] ? kfree_const+0x5e/0x70 [ 65.746598][ T9465] kobject_add+0x150/0x1c0 [ 65.750993][ T9465] ? kset_create_and_add+0x1a0/0x1a0 [ 65.756261][ T9465] ? get_device_parent.isra.0+0x34c/0x560 [ 65.761979][ T9465] ? rcu_read_lock_sched_held+0x110/0x130 [ 65.767677][ T9465] ? kmem_cache_alloc_trace+0x351/0x750 [ 65.773214][ T9465] get_device_parent.isra.0+0x413/0x560 [ 65.778934][ T9465] device_add+0x2df/0x17a0 [ 65.783350][ T9465] ? get_device_parent.isra.0+0x560/0x560 [ 65.789048][ T9465] ? start_creating+0x163/0x1e0 [ 65.793892][ T9465] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 65.800224][ T9465] hci_register_dev+0x2e8/0x860 [ 65.805062][ T9465] __vhci_create_device+0x2d0/0x5a0 [ 65.810252][ T9465] vhci_write+0x2d0/0x470 [ 65.814572][ T9465] new_sync_write+0x4d3/0x770 [ 65.819227][ T9465] ? new_sync_read+0x800/0x800 [ 65.824001][ T9465] ? common_file_perm+0x238/0x720 [ 65.829005][ T9465] ? __fget+0x381/0x550 [ 65.833154][ T9465] ? apparmor_file_permission+0x25/0x30 [ 65.838684][ T9465] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.845136][ T9465] ? security_file_permission+0x8f/0x380 [ 65.850756][ T9465] ? putname+0xef/0x130 [ 65.854987][ T9465] __vfs_write+0xe1/0x110 [ 65.859322][ T9465] vfs_write+0x20c/0x580 [ 65.863568][ T9465] ksys_write+0x14f/0x290 [ 65.867894][ T9465] ? __ia32_sys_read+0xb0/0xb0 [ 65.872668][ T9465] ? do_syscall_64+0x26/0x680 [ 65.877345][ T9465] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.883409][ T9465] ? do_syscall_64+0x26/0x680 [ 65.888086][ T9465] __x64_sys_write+0x73/0xb0 [ 65.892672][ T9465] do_syscall_64+0xfd/0x680 [ 65.897174][ T9465] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.903069][ T9465] RIP: 0033:0x4467d9 [ 65.906953][ T9465] Code: e8 cc e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.926533][ T9465] RSP: 002b:00007f16d77fbdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 65.934926][ T9465] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004467d9 [ 65.942904][ T9465] RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003 [ 65.950859][ T9465] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 65.958812][ T9465] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 65.966765][ T9465] R13: 00007ffc107c211f R14: 00007f16d77fc9c0 R15: 0000000000000000 [ 65.976261][ T9465] Kernel Offset: disabled [ 65.980632][ T9465] Rebooting in 86400 seconds..