[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.694280][ T24] audit: type=1800 audit(1561621608.258:25): pid=8625 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.715960][ T24] audit: type=1800 audit(1561621608.268:26): pid=8625 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.768847][ T24] audit: type=1800 audit(1561621608.268:27): pid=8625 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 '10.128.15.197' (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 syzkaller login: [ 75.076590][ T9210] WARNING: CPU: 1 PID: 9210 at fs/kernfs/dir.c:493 kernfs_get.part.0+0x73/0x90 [ 75.085739][ T9210] Kernel panic - not syncing: panic_on_warn set ... [ 75.092649][ T9210] CPU: 1 PID: 9210 Comm: syz-executor187 Not tainted 5.2.0-rc6+ #41 [ 75.100638][ T9210] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.107044][ T9215] kobject: 'bluetooth' (000000001aa2a4e7): kobject_add_internal: parent: 'virtual', set: '(null)' [ 75.110699][ T9210] Call Trace: [ 75.110724][ T9210] dump_stack+0x172/0x1f0 [ 75.110743][ T9210] ? kernfs_unlink_sibling+0x140/0x170 [ 75.110771][ T9210] panic+0x2cb/0x744 [ 75.138374][ T9210] ? __warn_printk+0xf3/0xf3 [ 75.142990][ T9210] ? kernfs_get.part.0+0x73/0x90 [ 75.147946][ T9210] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.154222][ T9210] ? __warn.cold+0x5/0x4d [ 75.158573][ T9210] ? __warn+0xe8/0x1d0 [ 75.161690][ T9216] kobject: 'hci3' (00000000b713f1ff): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 75.162650][ T9210] ? kernfs_get.part.0+0x73/0x90 [ 75.162667][ T9210] __warn.cold+0x20/0x4d [ 75.162683][ T9210] ? kernfs_get.part.0+0x73/0x90 [ 75.162705][ T9210] report_bug+0x263/0x2b0 [ 75.177918][ T9215] kobject: 'hci1' (0000000000158ce4): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 75.178074][ T9210] do_error_trap+0x11b/0x200 [ 75.191697][ T9215] kobject: 'hci1' (0000000000158ce4): kobject_uevent_env [ 75.202152][ T9210] do_invalid_op+0x37/0x50 [ 75.202169][ T9210] ? kernfs_get.part.0+0x73/0x90 [ 75.202185][ T9210] invalid_op+0x14/0x20 [ 75.202198][ T9210] RIP: 0010:kernfs_get.part.0+0x73/0x90 [ 75.202214][ T9210] Code: e6 e8 31 9b 99 ff 45 85 e4 74 1a e8 a7 99 99 ff be 04 00 00 00 48 89 df e8 1a 20 d2 ff f0 ff 03 5b 41 5c 5d c3 e8 8d 99 99 ff <0f> 0b eb dd 48 89 df e8 f1 45 d2 ff eb c1 0f 1f 44 00 00 66 2e 0f [ 75.202221][ T9210] RSP: 0018:ffff88809294f818 EFLAGS: 00010293 [ 75.202232][ T9210] RAX: ffff888089bc46c0 RBX: ffff8880a44c97e0 RCX: ffffffff81d7277f [ 75.202250][ T9210] RDX: 0000000000000000 RSI: ffffffff81d727a3 RDI: 0000000000000005 [ 75.207877][ T9216] kobject: 'hci3' (00000000b713f1ff): kobject_uevent_env [ 75.213868][ T9210] RBP: ffff88809294f828 R08: ffff888089bc46c0 R09: ffffed10148992fd [ 75.213877][ T9210] R10: ffffed10148992fc R11: ffff8880a44c97e3 R12: 0000000000000000 [ 75.213885][ T9210] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88821b6f0ee0 [ 75.213912][ T9210] ? kernfs_get.part.0+0x4f/0x90 [ 75.213925][ T9210] ? kernfs_get.part.0+0x73/0x90 [ 75.213944][ T9210] ? kernfs_get.part.0+0x73/0x90 [ 75.219155][ T9216] kobject: 'hci3' (00000000b713f1ff): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' [ 75.223392][ T9210] kernfs_new_node+0xb6/0x120 [ 75.223413][ T9210] kernfs_create_dir_ns+0x52/0x160 [ 75.223433][ T9210] sysfs_create_dir_ns+0x131/0x2a0 [ 75.223453][ T9210] ? sysfs_create_mount_point+0xa0/0xa0 [ 75.228163][ T9215] kobject: 'hci1' (0000000000158ce4): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' [ 75.233157][ T9210] ? class_dir_child_ns_type+0xd/0x60 [ 75.233179][ T9210] kobject_add_internal.cold+0x116/0x662 [ 75.233205][ T9210] kobject_add+0x150/0x1c0 [ 75.259355][ T9216] kobject: 'rfkill206' (00000000df09290d): kobject_add_internal: parent: 'hci3', set: 'devices' [ 75.261372][ T9210] ? kset_create_and_add+0x1a0/0x1a0 [ 75.261393][ T9210] ? kasan_check_read+0x11/0x20 [ 75.261414][ T9210] ? mutex_unlock+0xd/0x10 [ 75.261436][ T9210] ? device_add+0x2f1/0x17a0 [ 75.261453][ T9210] device_add+0x3b7/0x17a0 [ 75.270319][ T9216] kobject: 'rfkill206' (00000000df09290d): kobject_uevent_env [ 75.277474][ T9210] ? get_device_parent.isra.0+0x560/0x560 [ 75.277489][ T9210] ? up_write+0xbe/0x1e0 [ 75.277512][ T9210] hci_register_dev+0x2e8/0x860 [ 75.277535][ T9210] __vhci_create_device+0x2d0/0x5a0 [ 75.277552][ T9210] vhci_write+0x2d0/0x470 [ 75.277573][ T9210] new_sync_write+0x4d3/0x770 [ 75.285411][ T9216] kobject: 'rfkill206' (00000000df09290d): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill206' [ 75.292762][ T9210] ? new_sync_read+0x800/0x800 [ 75.292787][ T9210] ? common_file_perm+0x238/0x720 [ 75.292806][ T9210] ? __fget+0x381/0x550 [ 75.309265][ T9215] kobject: 'rfkill207' (00000000e234221d): kobject_add_internal: parent: 'hci1', set: 'devices' [ 75.313794][ T9210] ? apparmor_file_permission+0x25/0x30 [ 75.319754][ T9215] kobject: 'rfkill207' (00000000e234221d): kobject_uevent_env [ 75.323780][ T9210] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.323796][ T9210] ? security_file_permission+0x8f/0x380 [ 75.323811][ T9210] ? putname+0xef/0x130 [ 75.323827][ T9210] __vfs_write+0xe1/0x110 [ 75.323852][ T9210] vfs_write+0x20c/0x580 [ 75.336855][ T9211] kobject: 'rfkill206' (00000000df09290d): kobject_uevent_env [ 75.338872][ T9210] ksys_write+0x14f/0x290 [ 75.343999][ T9211] kobject: 'rfkill206' (00000000df09290d): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3/rfkill206' [ 75.349074][ T9210] ? __ia32_sys_read+0xb0/0xb0 [ 75.349090][ T9210] ? do_syscall_64+0x26/0x680 [ 75.349104][ T9210] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.349117][ T9210] ? do_syscall_64+0x26/0x680 [ 75.349141][ T9210] __x64_sys_write+0x73/0xb0 [ 75.359077][ T9215] kobject: 'rfkill207' (00000000e234221d): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill207' [ 75.366501][ T9210] do_syscall_64+0xfd/0x680 [ 75.366523][ T9210] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.366535][ T9210] RIP: 0033:0x44aaf9 [ 75.366551][ T9210] Code: e8 dc e6 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 4b ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 75.366559][ T9210] RSP: 002b:00007f90555a2db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 75.366571][ T9210] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 000000000044aaf9 [ 75.366578][ T9210] RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 [ 75.366596][ T9210] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 75.373114][ T9211] kobject: 'rfkill206' (00000000df09290d): kobject_cleanup, parent 00000000d27cb44e [ 75.377588][ T9210] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 75.377597][ T9210] R13: 00007ffe5b58e38f R14: 00007f90555a39c0 R15: 0000000000000000 [ 75.383123][ T9210] Kernel Offset: disabled [ 75.684186][ T9210] Rebooting in 86400 seconds..