[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 49.532453][ T26] audit: type=1800 audit(1561873048.623:25): pid=7981 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 49.565261][ T26] audit: type=1800 audit(1561873048.623:26): pid=7981 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 49.625118][ T26] audit: type=1800 audit(1561873048.653:27): pid=7981 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.1.47' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 61.409352][ T8613] WARNING: CPU: 0 PID: 8613 at fs/kernfs/dir.c:493 kernfs_create_dir_ns+0x205/0x230 [ 61.409740][ T8612] kobject: 'hci5' (00000000a875c047): kobject_cleanup, parent 00000000f6b94af9 [ 61.419034][ T8613] Kernel panic - not syncing: panic_on_warn set ... [ 61.419048][ T8613] CPU: 0 PID: 8613 Comm: syz-executor696 Not tainted 5.2.0-rc6+ #11 [ 61.419054][ T8613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.419059][ T8613] Call Trace: [ 61.419103][ T8613] dump_stack+0x1d8/0x2f8 [ 61.419139][ T8613] panic+0x28a/0x7c9 [ 61.419152][ T8613] ? __warn+0x126/0x220 [ 61.419161][ T8613] ? nmi_panic+0x97/0x97 [ 61.419173][ T8613] ? kernfs_create_dir_ns+0x205/0x230 [ 61.419199][ T8613] ? is_valid_bugaddr+0x81/0x100 [ 61.419210][ T8613] __warn+0x216/0x220 [ 61.419221][ T8613] ? kernfs_create_dir_ns+0x205/0x230 [ 61.419233][ T8613] report_bug+0x190/0x290 [ 61.419243][ T8613] ? kernfs_create_dir_ns+0x205/0x230 [ 61.419256][ T8613] do_error_trap+0xd7/0x450 [ 61.419272][ T8613] do_invalid_op+0x36/0x40 [ 61.438758][ T8615] kobject: 'bluetooth' (00000000ac8ecbaf): kobject_add_internal: parent: 'virtual', set: '(null)' [ 61.442955][ T8613] ? kernfs_create_dir_ns+0x205/0x230 [ 61.442985][ T8613] invalid_op+0x14/0x20 [ 61.443002][ T8613] RIP: 0010:kernfs_create_dir_ns+0x205/0x230 [ 61.443012][ T8613] Code: ff 4c 89 ff e8 7c cd ff ff 4c 63 fb eb 05 e8 22 27 9a ff 4c 89 f8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 0b 27 9a ff <0f> 0b e9 e9 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c be fe ff [ 61.469572][ T8616] kobject: 'hci2' (00000000cd3f6ae5): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 61.472534][ T8613] RSP: 0018:ffff88808d26f730 EFLAGS: 00010293 [ 61.472545][ T8613] RAX: ffffffff81db8a95 RBX: ffff88809e5252a0 RCX: ffff88808a4aa000 [ 61.472551][ T8613] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 61.472558][ T8613] RBP: ffff88808d26f768 R08: ffffffff81db8977 R09: ffffed1013ca4a55 [ 61.472565][ T8613] R10: ffffed1013ca4a55 R11: 1ffff11013ca4a54 R12: ffff888098a8a200 [ 61.472571][ T8613] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880a339e620 [ 61.472596][ T8613] ? kernfs_create_dir_ns+0xe7/0x230 [ 61.477542][ T8615] kobject: 'hci3' (00000000b9cb617a): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 61.480956][ T8613] ? kernfs_create_dir_ns+0x205/0x230 [ 61.480987][ T8613] sysfs_create_dir_ns+0x161/0x300 [ 61.481005][ T8613] ? sysfs_warn_dup+0xb0/0xb0 [ 61.489103][ T8616] kobject: 'hci2' (00000000cd3f6ae5): kobject_uevent_env [ 61.491303][ T8613] ? do_raw_spin_unlock+0x49/0x260 [ 61.491327][ T8613] kobject_add_internal+0x459/0xd50 [ 61.496567][ T8612] kobject: 'hci5' (00000000a875c047): calling ktype release [ 61.500654][ T8613] kobject_add+0x138/0x200 [ 61.500667][ T8613] ? mutex_unlock+0x10/0x10 [ 61.500679][ T8613] ? kobject_init+0x1e0/0x1e0 [ 61.500707][ T8613] ? kasan_check_read+0x11/0x20 [ 61.514342][ T8616] kobject: 'hci2' (00000000cd3f6ae5): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2' [ 61.514950][ T8613] ? mutex_unlock+0xd/0x10 [ 61.514991][ T8613] ? get_device_parent+0x33c/0x4e0 [ 61.515005][ T8613] device_add+0x508/0x1570 [ 61.521980][ T8615] kobject: 'hci3' (00000000b9cb617a): kobject_uevent_env [ 61.530009][ T8613] ? dev_set_name+0x110/0x110 [ 61.530064][ T8613] hci_register_dev+0x331/0x6c0 [ 61.530108][ T8613] vhci_create_device+0x2d1/0x510 [ 61.530122][ T8613] vhci_write+0x3ac/0x440 [ 61.539485][ T8612] kobject: 'hci5': free name [ 61.539639][ T8613] __vfs_write+0x617/0x7d0 [ 61.549675][ T8616] kobject: 'rfkill452' (000000003dc9b53a): kobject_add_internal: parent: 'hci2', set: 'devices' [ 61.565207][ T8613] ? __kernel_write+0x330/0x330 [ 61.565251][ T8613] ? security_file_permission+0x148/0x350 [ 61.565264][ T8613] ? rw_verify_area+0x1c2/0x360 [ 61.565275][ T8613] vfs_write+0x227/0x510 [ 61.565290][ T8613] ksys_write+0x16b/0x2a0 [ 61.565309][ T8613] ? up_read+0x22/0x30 [ 61.565321][ T8613] ? __ia32_sys_read+0x90/0x90 [ 61.565342][ T8613] ? check_preemption_disabled+0xb7/0x280 [ 61.565364][ T8613] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 61.590716][ T8615] kobject: 'hci3' (00000000b9cb617a): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' [ 61.597953][ T8613] ? trace_irq_disable_rcuidle+0x23/0x1c0 [ 61.597969][ T8613] ? do_syscall_64+0x1d/0x140 [ 61.597982][ T8613] __x64_sys_write+0x7b/0x90 [ 61.597993][ T8613] do_syscall_64+0xfe/0x140 [ 61.598009][ T8613] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.598019][ T8613] RIP: 0033:0x441279 [ 61.598031][ T8613] Code: e8 ac e8 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 61.598036][ T8613] RSP: 002b:00007fffa3738588 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 61.635139][ T8616] kobject: 'rfkill452' (000000003dc9b53a): kobject_uevent_env [ 61.637655][ T8613] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441279 [ 61.637662][ T8613] RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 [ 61.637668][ T8613] RBP: 000000000000ef5c R08: 00000000004002c8 R09: 00000000004002c8 [ 61.637675][ T8613] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401ff0 [ 61.637681][ T8613] R13: 0000000000402080 R14: 0000000000000000 R15: 0000000000000000 [ 61.644449][ T8613] Kernel Offset: disabled [ 61.940216][ T8613] Rebooting in 86400 seconds..