[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. syzkaller login: [ 63.627058][ T6853] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 64.767937][ T1545] debugfs: Directory '200' with parent 'hci0' already present! [ 64.776162][ T6877] Bluetooth: hci0: hardware error 0x00 [ 64.783145][ T1545] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:200' [ 64.793177][ T1545] CPU: 0 PID: 1545 Comm: kworker/u5:0 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 64.802849][ T1545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.813080][ T1545] Workqueue: hci0 hci_rx_work executing program executing program [ 64.817789][ T1545] Call Trace: [ 64.821126][ T1545] dump_stack+0x18f/0x20d [ 64.825491][ T1545] sysfs_warn_dup.cold+0x1c/0x2d [ 64.830493][ T1545] sysfs_create_dir_ns+0x233/0x290 [ 64.835640][ T1545] ? sysfs_create_mount_point+0xb0/0xb0 [ 64.841209][ T1545] ? rwlock_bug.part.0+0x90/0x90 [ 64.847503][ T1545] ? do_raw_spin_unlock+0x171/0x230 [ 64.854035][ T1545] kobject_add_internal+0x2c3/0x940 [ 64.859971][ T1545] kobject_add+0x150/0x1c0 executing program [ 64.864502][ T1545] ? kset_create_and_add+0x190/0x190 [ 64.869821][ T1545] ? lockdep_init_map_waits+0x26a/0x8a0 [ 64.875396][ T1545] ? __raw_spin_lock_init+0x34/0x100 [ 64.880720][ T1545] ? device_add+0x33b/0x1c40 [ 64.885352][ T1545] device_add+0x35a/0x1c40 [ 64.889794][ T1545] ? devlink_add_symlinks+0x450/0x450 [ 64.895192][ T1545] ? hci_debugfs_create_conn+0x179/0x1f0 [ 64.900952][ T1545] ? hci_debugfs_create_le+0x850/0x850 [ 64.906450][ T1545] hci_conn_add_sysfs+0x84/0xe0 [ 64.911329][ T1545] hci_event_packet+0x1286/0x87a8 [ 64.916426][ T1545] ? hci_cmd_complete_evt+0xc6d0/0xc6d0 [ 64.922005][ T1545] ? lock_acquire+0x1f1/0xad0 [ 64.926699][ T1545] ? skb_dequeue+0x1c/0x180 [ 64.931211][ T1545] ? find_held_lock+0x2d/0x110 [ 64.936043][ T1545] ? mark_lock+0xbc/0x1710 [ 64.940493][ T1545] ? mark_held_locks+0x9f/0xe0 [ 64.945289][ T1545] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 64.951142][ T1545] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 64.957184][ T1545] ? trace_hardirqs_on+0x5f/0x220 [ 64.962235][ T1545] ? lockdep_hardirqs_on+0x76/0xf0 [ 64.967392][ T1545] hci_rx_work+0x22e/0xb50 [ 64.971851][ T1545] process_one_work+0x94c/0x1670 [ 64.976827][ T1545] ? lock_release+0x8e0/0x8e0 [ 64.981519][ T1545] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 64.986915][ T1545] ? rwlock_bug.part.0+0x90/0x90 [ 64.991876][ T1545] ? lockdep_hardirqs_off+0x7e/0xb0 [ 64.997120][ T1545] worker_thread+0x64c/0x1120 [ 65.001835][ T1545] ? process_one_work+0x1670/0x1670 [ 65.007103][ T1545] kthread+0x3b5/0x4a0 [ 65.011594][ T1545] ? __kthread_bind_mask+0xc0/0xc0 executing program executing program executing program executing program executing program executing program executing program executing program [ 65.016731][ T1545] ? __kthread_bind_mask+0xc0/0xc0 [ 65.021867][ T1545] ret_from_fork+0x1f/0x30 [ 65.039660][ T1545] kobject_add_internal failed for hci0:200 with -EEXIST, don't try to register things with the same name in the same directory. [ 65.055496][ T1545] Bluetooth: hci0: failed to register connection 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 [ 65.248895][ T6890] debugfs: Directory '200' with parent 'hci0' already present! [ 65.256902][ T6890] list_add double add: new=ffff88809337a420, prev=ffff88809337a420, next=ffff88821b775a00. [ 65.267649][ T6890] ------------[ cut here ]------------ [ 65.273243][ T6890] kernel BUG at lib/list_debug.c:29! [ 65.278592][ T6890] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 65.284671][ T6890] CPU: 0 PID: 6890 Comm: kworker/u5:3 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 65.294345][ T6890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.304429][ T6890] Workqueue: hci0 hci_rx_work [ 65.309180][ T6890] RIP: 0010:__list_add_valid.cold+0x26/0x3c [ 65.315165][ T6890] Code: 57 ff ff ff 4c 89 e1 48 c7 c7 a0 08 94 88 e8 ca 82 be fd 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 e0 09 94 88 e8 b3 82 be fd <0f> 0b 48 89 f1 48 c7 c7 60 09 94 88 4c 89 e6 e8 9f 82 be fd 0f 0b [ 65.334801][ T6890] RSP: 0018:ffffc90001397830 EFLAGS: 00010282 [ 65.340886][ T6890] RAX: 0000000000000058 RBX: ffff88821b775a00 RCX: 0000000000000000 [ 65.348867][ T6890] RDX: ffff8880a80f2300 RSI: ffffffff815d86e7 RDI: fffff52000272ef8 [ 65.356978][ T6890] RBP: ffff88809337a420 R08: 0000000000000058 R09: ffff8880ae6318a7 [ 65.364974][ T6890] R10: 0000000000000000 R11: 0000000000076548 R12: ffff88821b775a00 [ 65.372982][ T6890] R13: ffff88808d875288 R14: ffff88809337a438 R15: ffff88809337a420 [ 65.380982][ T6890] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 65.389927][ T6890] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.396532][ T6890] CR2: 0000000020000480 CR3: 00000000a87f2000 CR4: 00000000001506f0 [ 65.404529][ T6890] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.412625][ T6890] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.420618][ T6890] Call Trace: [ 65.423923][ T6890] kobject_add_internal+0x18d/0x940 [ 65.429148][ T6890] kobject_add+0x150/0x1c0 [ 65.433586][ T6890] ? kset_create_and_add+0x190/0x190 [ 65.438881][ T6890] ? kfree+0x1cd/0x2c0 [ 65.442958][ T6890] ? trace_hardirqs_on+0x5f/0x220 [ 65.448002][ T6890] ? lockdep_hardirqs_on+0x76/0xf0 [ 65.453125][ T6890] ? device_add+0x33b/0x1c40 [ 65.457727][ T6890] device_add+0x35a/0x1c40 [ 65.465816][ T6890] ? devlink_add_symlinks+0x450/0x450 [ 65.471202][ T6890] ? hci_debugfs_create_conn+0x179/0x1f0 [ 65.476848][ T6890] ? hci_debugfs_create_le+0x850/0x850 [ 65.482345][ T6890] hci_conn_add_sysfs+0x84/0xe0 [ 65.487225][ T6890] hci_event_packet+0x1286/0x87a8 [ 65.492262][ T6890] ? hci_cmd_complete_evt+0xc6d0/0xc6d0 [ 65.497837][ T6890] ? lock_acquire+0x1f1/0xad0 [ 65.502530][ T6890] ? skb_dequeue+0x1c/0x180 [ 65.507044][ T6890] ? find_held_lock+0x2d/0x110 [ 65.511919][ T6890] ? mark_lock+0xbc/0x1710 [ 65.516377][ T6890] ? mark_held_locks+0x9f/0xe0 [ 65.521173][ T6890] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 65.526990][ T6890] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 65.532979][ T6890] ? trace_hardirqs_on+0x5f/0x220 [ 65.538026][ T6890] ? lockdep_hardirqs_on+0x76/0xf0 [ 65.543155][ T6890] hci_rx_work+0x22e/0xb50 [ 65.547584][ T6890] process_one_work+0x94c/0x1670 [ 65.552541][ T6890] ? lock_release+0x8e0/0x8e0 [ 65.557247][ T6890] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 65.562639][ T6890] ? rwlock_bug.part.0+0x90/0x90 [ 65.567592][ T6890] ? lockdep_hardirqs_off+0x7e/0xb0 [ 65.572832][ T6890] worker_thread+0x64c/0x1120 [ 65.577546][ T6890] ? __kthread_parkme+0x13f/0x1e0 [ 65.582600][ T6890] ? process_one_work+0x1670/0x1670 [ 65.587830][ T6890] kthread+0x3b5/0x4a0 [ 65.591964][ T6890] ? __kthread_bind_mask+0xc0/0xc0 executing program executing program executing program executing program [ 65.597106][ T6890] ? __kthread_bind_mask+0xc0/0xc0 [ 65.602241][ T6890] ret_from_fork+0x1f/0x30 [ 65.606663][ T6890] Modules linked in: [ 65.610703][ T6890] ---[ end trace 9123d7ba102bd210 ]--- [ 65.616196][ T6890] RIP: 0010:__list_add_valid.cold+0x26/0x3c [ 65.622156][ T6890] Code: 57 ff ff ff 4c 89 e1 48 c7 c7 a0 08 94 88 e8 ca 82 be fd 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 e0 09 94 88 e8 b3 82 be fd <0f> 0b 48 89 f1 48 c7 c7 60 09 94 88 4c 89 e6 e8 9f 82 be fd 0f 0b [ 65.642189][ T6890] RSP: 0018:ffffc90001397830 EFLAGS: 00010282 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 65.648474][ T6890] RAX: 0000000000000058 RBX: ffff88821b775a00 RCX: 0000000000000000 [ 65.656884][ T6890] RDX: ffff8880a80f2300 RSI: ffffffff815d86e7 RDI: fffff52000272ef8 [ 65.665146][ T6890] RBP: ffff88809337a420 R08: 0000000000000058 R09: ffff8880ae6318a7 [ 65.673386][ T6890] R10: 0000000000000000 R11: 0000000000076548 R12: ffff88821b775a00 [ 65.681739][ T6890] R13: ffff88808d875288 R14: ffff88809337a438 R15: ffff88809337a420 [ 65.689968][ T6890] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 executing program executing program executing program executing program executing program executing program executing program [ 65.699186][ T6890] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.706155][ T6890] CR2: 0000000020000480 CR3: 0000000009a79000 CR4: 00000000001506f0 [ 65.714243][ T6890] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.722421][ T6890] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.730466][ T6890] Kernel panic - not syncing: Fatal exception [ 65.737598][ T6890] Kernel Offset: disabled [ 65.741944][ T6890] Rebooting in 86400 seconds..