[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.954833] audit: type=1800 audit(1561619985.470:33): pid=7381 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 42.039219] kauditd_printk_skb: 1 callbacks suppressed [ 42.039233] audit: type=1400 audit(1561619989.550:35): avc: denied { map } for pid=7557 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.90' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 48.573419] audit: type=1400 audit(1561619996.090:36): avc: denied { map } for pid=7569 comm="syz-executor085" path="/root/syz-executor085541103" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program [ 48.625294] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 48.673504] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.089992] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 50.089998] kobject_add_internal failed for hci3 (error: -2 parent: bluetooth) [ 50.090094] Bluetooth: Can't register HCI device [ 50.133950] 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 [ 50.175083] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) [ 50.210845] 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 [ 50.268125] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 50.278353] 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 [ 50.405593] kobject_add_internal failed for hci5 (error: -2 parent: bluetooth) [ 50.406079] kobject_add_internal failed for hci6 (error: -2 parent: bluetooth) [ 50.443745] Bluetooth: Can't register HCI device [ 50.450434] 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 [ 50.580160] kobject_add_internal failed for hci2 (error: -2 parent: bluetooth) [ 50.606868] 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 [ 51.410116] kobject_add_internal failed for hci1 (error: -2 parent: bluetooth) [ 51.434484] Bluetooth: Can't register HCI device [ 51.443388] kobject_add_internal failed for hci4 (error: -2 parent: bluetooth) executing program executing program executing program executing program executing program [ 51.458492] 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 [ 51.659526] ------------[ cut here ]------------ [ 51.670292] kernfs_put: bluetooth/hci6: released with incorrect active_ref 0 [ 51.678145] WARNING: CPU: 1 PID: 8152 at fs/kernfs/dir.c:525 kernfs_put+0x4c6/0x5d0 [ 51.678155] Kernel panic - not syncing: panic_on_warn set ... [ 51.678155] [ 51.690323] kobject: 'hci4' (0000000096f8c634): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 51.694097] CPU: 1 PID: 8152 Comm: syz-executor085 Not tainted 4.19.56 #28 [ 51.694104] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.694108] Call Trace: [ 51.694130] dump_stack+0x172/0x1f0 [ 51.694148] panic+0x263/0x507 [ 51.694164] ? __warn_printk+0xf3/0xf3 [ 51.703954] kobject: 'hci5' (0000000069d466ff): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 51.710855] ? kernfs_put+0x4c6/0x5d0 [ 51.710874] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.720276] kobject: 'hci1' (00000000b16d0944): kobject_add_internal: parent: 'bluetooth', set: 'devices' [ 51.722776] ? __warn.cold+0x5/0x4a [ 51.722789] ? __warn+0xe8/0x1d0 [ 51.722806] ? kernfs_put+0x4c6/0x5d0 [ 51.722820] __warn.cold+0x20/0x4a [ 51.722837] ? kernfs_put+0x4c6/0x5d0 [ 51.729309] kobject: 'hci2' (00000000fba06d42): kobject_uevent_env [ 51.729650] report_bug+0x263/0x2b0 [ 51.736960] kobject: 'hci1' (00000000b16d0944): kobject_uevent_env [ 51.743224] do_error_trap+0x204/0x360 [ 51.743239] ? math_error+0x340/0x340 [ 51.743251] ? wake_up_klogd+0x99/0xd0 [ 51.743262] ? vprintk_emit+0x264/0x690 [ 51.743274] ? vprintk_emit+0x1ab/0x690 [ 51.743289] ? error_entry+0x76/0xd0 [ 51.743304] ? trace_hardirqs_off_caller+0x65/0x220 [ 51.743321] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.743338] do_invalid_op+0x1b/0x20 [ 51.753004] kobject: 'hci2' (00000000fba06d42): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2' [ 51.762339] invalid_op+0x14/0x20 [ 51.762356] RIP: 0010:kernfs_put+0x4c6/0x5d0 [ 51.762369] Code: 0f 85 1d 01 00 00 49 8b 75 30 48 89 75 c8 e8 81 4e 9e ff 48 8b 55 d0 44 89 f1 48 c7 c7 80 dc 57 87 48 8b 75 c8 e8 b8 27 72 ff <0f> 0b e9 61 fc ff ff e8 9e b3 d4 ff e9 ba fd ff ff 48 8b 7d d0 e8 [ 51.762376] RSP: 0018:ffff88809d777ac8 EFLAGS: 00010282 [ 51.762388] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 51.762396] RDX: 0000000000000000 RSI: ffffffff8155b1c6 RDI: ffffed1013aeef4b [ 51.762404] RBP: ffff88809d777b20 R08: ffff88808b4ae400 R09: ffffed1015d24fe9 [ 51.762412] R10: ffffed1015d24fe8 R11: ffff8880ae927f47 R12: ffff8880a5ae20e0 [ 51.762423] R13: ffff8880a81377e0 R14: 0000000000000000 R15: ffff8880a5ae2110 [ 51.768466] kobject: 'hci3' (000000005eda11c4): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' [ 51.770870] ? vprintk_func+0x86/0x189 [ 51.770888] ? kernfs_put+0x4c6/0x5d0 [ 51.781278] kobject: 'hci1' (00000000b16d0944): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' [ 51.781992] kobject_del.part.0+0x42/0xf0 [ 51.782006] kobject_del+0x20/0x30 [ 51.782022] device_del+0x701/0xb70 [ 51.782040] ? __device_links_no_driver+0x270/0x270 [ 51.782051] ? kobject_put+0x84/0xe0 [ 51.782068] ? vhci_close_dev+0x50/0x50 [ 51.791018] kobject: 'hci4' (0000000096f8c634): kobject_uevent_env [ 51.791989] ? vhci_close_dev+0x50/0x50 [ 51.792006] hci_unregister_dev+0x2c6/0x820 [ 51.792024] ? vhci_close_dev+0x50/0x50 [ 51.792036] vhci_release+0x76/0xf0 [ 51.792052] __fput+0x2dd/0x8b0 [ 51.802063] kobject: 'hci4' (0000000096f8c634): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4' [ 51.802237] ____fput+0x16/0x20 [ 51.806109] kobject: 'rfkill565' (00000000ff39e5ff): kobject_add_internal: parent: 'hci3', set: 'devices' [ 51.809904] task_work_run+0x145/0x1c0 [ 51.809924] do_exit+0x933/0x2fa0 [ 51.819810] kobject: 'hci5' (0000000069d466ff): kobject_uevent_env [ 51.821550] ? mm_update_next_owner+0x660/0x660 [ 51.821566] ? up_read+0x1a/0x110 [ 51.835145] kobject: 'rfkill565' (00000000ff39e5ff): kobject_uevent_env [ 51.844737] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.844753] ? __do_page_fault+0x484/0xe90 [ 51.844765] ? ksys_write+0x1f1/0x2d0 [ 51.844785] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.844797] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.844815] do_group_exit+0x135/0x370 [ 51.844829] __x64_sys_exit_group+0x44/0x50 [ 51.844844] do_syscall_64+0xfd/0x620 [ 51.853649] kobject: 'hci5' (0000000069d466ff): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5' [ 51.871595] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.871606] RIP: 0033:0x440078 [ 51.871619] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 51.871627] RSP: 002b:00007fff390b30b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 51.871640] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440078 [ 51.871647] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 51.871654] RBP: 00000000004bf8b0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 51.871661] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000000001 [ 51.871668] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 51.878396] Kernel Offset: disabled [ 52.161327] Rebooting in 86400 seconds..