[....] 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. [ 29.818270] kauditd_printk_skb: 8 callbacks suppressed [ 29.818282] audit: type=1800 audit(1545245491.563:29): pid=5901 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 [ 29.843763] audit: type=1800 audit(1545245491.563:30): pid=5901 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 syzkaller login: [ 33.634886] sshd (6039) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.0.45' (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 [ 41.310442] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 41.341742] 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 [ 41.726944] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) [ 41.746026] 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 [ 42.036410] kasan: CONFIG_KASAN_INLINE enabled [ 42.054136] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.073476] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.073623] kobject: 'rfkill277' (000000004fe3f8b4): kobject_uevent_env [ 42.079723] CPU: 0 PID: 6347 Comm: syz-executor390 Not tainted 4.20.0-rc7+ #378 [ 42.079732] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.079750] RIP: 0010:kernfs_add_one+0x342/0x4d0 [ 42.079766] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 49 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 70 49 8d 7d 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 16 01 00 00 45 8b 6d 08 31 ff [ 42.088387] kobject: 'rfkill277' (000000004fe3f8b4): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0/rfkill277' [ 42.093952] RSP: 0018:ffff8881bc7a75d0 EFLAGS: 00010202 [ 42.093965] RAX: dffffc0000000000 RBX: ffff8881c152f1c0 RCX: ffffffff87da4267 [ 42.093974] RDX: 0000000000000001 RSI: ffffffff81f913fa RDI: 0000000000000008 [ 42.093984] RBP: ffff8881bc7a7618 R08: fffffbfff12cfac5 R09: fffffbfff12cfac4 [ 42.093993] R10: fffffbfff12cfac4 R11: ffffffff8967d627 R12: 0000000000000000 [ 42.094000] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 42.094016] FS: 00000000014bf880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 42.104283] kobject: 'rfkill278' (00000000dd18287d): kobject_uevent_env [ 42.108117] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.108126] CR2: 00007f1dfad44000 CR3: 00000001d81db000 CR4: 00000000001406f0 [ 42.108138] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.108145] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.108155] Call Trace: [ 42.127476] kobject: 'rfkill278' (00000000dd18287d): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2/rfkill278' [ 42.137962] kernfs_create_dir_ns+0xf6/0x160 [ 42.137980] sysfs_create_dir_ns+0x19b/0x340 [ 42.137995] ? sysfs_create_mount_point+0xa0/0xa0 [ 42.138013] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 42.143945] kobject: 'rfkill279' (00000000f96161dc): kobject_add_internal: parent: 'hci1', set: 'devices' [ 42.150634] ? class_dir_child_ns_type+0xd/0x60 [ 42.150654] kobject_add_internal.cold.11+0x116/0x6af [ 42.150670] ? kobj_ns_type_registered+0x60/0x60 [ 42.158600] kobject: 'rfkill278' (00000000dd18287d): kobject_uevent_env [ 42.165201] ? lock_downgrade+0x900/0x900 [ 42.165219] ? refcount_add_not_zero_checked+0x330/0x330 [ 42.165239] ? kasan_check_read+0x11/0x20 [ 42.165255] kobject_add+0x13f/0x1b0 [ 42.172609] kobject: 'rfkill278' (00000000dd18287d): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2/rfkill278' [ 42.179776] ? kset_create_and_add+0x190/0x190 [ 42.179796] ? mutex_unlock+0xd/0x10 [ 42.179820] ? device_add+0x382/0x18e0 [ 42.179845] device_add+0x445/0x18e0 [ 42.188775] kobject: 'rfkill279' (00000000f96161dc): kobject_uevent_env [ 42.194797] ? kfree_const+0x5e/0x70 [ 42.194825] ? get_device_parent.isra.25+0x5a0/0x5a0 [ 42.194844] ? dev_set_name+0xad/0xe0 [ 42.194862] ? device_initialize+0x5f0/0x5f0 [ 42.201067] kobject: 'rfkill279' (00000000f96161dc): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill279' [ 42.208016] hci_register_dev+0x3b3/0x9c0 [ 42.208034] ? _copy_from_iter_full+0x2d8/0xce0 [ 42.208051] ? hci_conn_params_free+0x810/0x810 [ 42.208069] ? iov_iter_advance+0x13f0/0x13f0 executing program [ 42.216213] kobject: 'rfkill279' (00000000f96161dc): kobject_uevent_env [ 42.222606] __vhci_create_device+0x2c1/0x580 [ 42.222623] vhci_write+0x2de/0x470 [ 42.222641] __vfs_write+0x6b8/0x9f0 [ 42.225599] kobject: 'rfkill279' (00000000f96161dc): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill279' [ 42.236150] ? kernel_read+0x120/0x120 [ 42.236167] ? apparmor_path_rmdir+0x30/0x30 [ 42.236184] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 42.236202] ? apparmor_file_permission+0x24/0x30 [ 42.241048] kobject: 'rfkill279' (00000000f96161dc): kobject_cleanup, parent (null) [ 42.244999] ? rw_verify_area+0x118/0x360 [ 42.245016] vfs_write+0x1fc/0x560 [ 42.245033] ksys_write+0x101/0x260 [ 42.245051] ? __ia32_sys_read+0xb0/0xb0 [ 42.250249] kobject: 'rfkill279' (00000000f96161dc): calling ktype release [ 42.254649] ? trace_hardirqs_off_caller+0x310/0x310 [ 42.254668] __x64_sys_write+0x73/0xb0 [ 42.254684] do_syscall_64+0x1b9/0x820 [ 42.254702] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.264733] kobject: 'rfkill279': free name [ 42.269049] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.269064] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.269081] ? trace_hardirqs_on_caller+0x310/0x310 [ 42.269099] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.274690] kobject: 'hci1' (0000000039b1db8d): kobject_uevent_env [ 42.279021] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.279036] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.279056] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.286168] kobject: 'hci1' (0000000039b1db8d): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' [ 42.289976] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.289987] RIP: 0033:0x440e49 [ 42.290002] 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 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 42.290014] RSP: 002b:00007ffc9f377fb8 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 [ 42.295929] kobject: 'hci1' (0000000039b1db8d): kobject_cleanup, parent (null) [ 42.299581] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440e49 [ 42.299589] RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003 [ 42.299597] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 42.299605] R10: 00000000014bf880 R11: 0000000000000213 R12: 000000000000a3e6 [ 42.299613] R13: 0000000000401d70 R14: 0000000000000000 R15: 0000000000000000 [ 42.299640] Modules linked in: [ 42.303750] kobject: 'hci1' (0000000039b1db8d): calling ktype release [ 42.315849] ---[ end trace faa6bddeb8128337 ]--- [ 42.318989] kobject: 'rfkill280' (00000000e40d2e49): kobject_add_internal: parent: 'hci4', set: 'devices' [ 42.322771] RIP: 0010:kernfs_add_one+0x342/0x4d0 [ 42.341945] kobject: 'hci1': free name [ 42.347704] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 49 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 70 49 8d 7d 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 16 01 00 00 45 8b 6d 08 31 ff [ 42.355524] kobject: 'rfkill280' (00000000e40d2e49): kobject_uevent_env [ 42.366605] RSP: 0018:ffff8881bc7a75d0 EFLAGS: 00010202 [ 42.408323] kobject: 'hci1' (00000000e38cddfa): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 42.414206] RAX: dffffc0000000000 RBX: ffff8881c152f1c0 RCX: ffffffff87da4267 [ 42.427871] kobject: 'rfkill280' (00000000e40d2e49): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4/rfkill280' [ 42.432449] RDX: 0000000000000001 RSI: ffffffff81f913fa RDI: 0000000000000008 [ 42.459457] kobject: 'hci1' (00000000e38cddfa): kobject_uevent_env [ 42.464553] RBP: ffff8881bc7a7618 R08: fffffbfff12cfac5 R09: fffffbfff12cfac4 [ 42.491828] kobject: 'rfkill281' (000000009d9796a7): kobject_add_internal: parent: 'hci5', set: 'devices' [ 42.495588] R10: fffffbfff12cfac4 R11: ffffffff8967d627 R12: 0000000000000000 [ 42.500276] kobject: 'rfkill281' (000000009d9796a7): kobject_uevent_env [ 42.505328] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 42.512486] kobject: 'rfkill280' (00000000e40d2e49): kobject_uevent_env [ 42.517802] kobject: 'hci1' (00000000e38cddfa): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' [ 42.529671] kobject: 'rfkill281' (000000009d9796a7): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5/rfkill281' [ 42.537981] FS: 00000000014bf880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 42.548314] kobject: 'rfkill280' (00000000e40d2e49): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4/rfkill280' [ 42.566404] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.587381] kobject: 'rfkill277' (000000004fe3f8b4): kobject_cleanup, parent (null) [ 42.587389] kobject: 'rfkill277' (000000004fe3f8b4): calling ktype release [ 42.587409] kobject: 'rfkill277': free name [ 42.587493] kobject: 'hci0' (000000003c073c9a): kobject_uevent_env [ 42.587517] kobject: 'hci0' (000000003c073c9a): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0' [ 42.598228] CR2: 00007f1dfad44000 CR3: 00000001d81db000 CR4: 00000000001406f0 [ 42.602154] kobject: 'rfkill278' (00000000dd18287d): kobject_cleanup, parent (null) [ 42.609514] kobject: 'rfkill282' (00000000e3ed3f9c): kobject_add_internal: parent: 'hci1', set: 'devices' [ 42.623780] kobject: 'rfkill281' (000000009d9796a7): kobject_uevent_env [ 42.626984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.636047] kobject: 'hci0' (000000003c073c9a): kobject_cleanup, parent (null) [ 42.642829] kobject: 'rfkill282' (00000000e3ed3f9c): kobject_uevent_env [ 42.650972] kobject: 'rfkill281' (000000009d9796a7): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5/rfkill281' [ 42.670332] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.689779] kobject: 'rfkill278' (00000000dd18287d): calling ktype release [ 42.692349] kobject: 'rfkill282' (00000000e3ed3f9c): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill282' [ 42.707184] kobject: 'hci0' (000000003c073c9a): calling ktype release [ 42.710867] Kernel panic - not syncing: Fatal exception [ 42.731989] kobject: 'rfkill278': free name [ 42.740217] Kernel Offset: disabled [ 42.959701] Rebooting in 86400 seconds..