kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN kobject: 'hci4' (ffff888094b76668): kobject_uevent_env Modules linked in: CPU: 1 PID: 7372 Comm: syz-executor143 Not tainted 4.14.135 #31 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888096c5a440 task.stack: ffff8880a58d8000 RIP: 0010:kernfs_add_one+0x2cb/0x3a0 fs/kernfs/dir.c:794 RSP: 0018:ffff8880a58df980 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000003 RDX: 0000000000000001 RSI: 0000000000000002 RDI: 0000000000000008 RBP: ffff8880a58df9b8 R08: fffffbfff12354d8 R09: ffff888096c5a440 R10: dffffc0000000000 R11: ffff888096c5a440 R12: ffff88809e96a9a0 R13: ffff88809e96a9a0 R14: 0000000000000000 R15: ffff88809e96a9c8 FS: 0000000000f75880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000043fc4a CR3: 0000000096d23000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernfs_create_dir_ns+0xea/0x140 fs/kernfs/dir.c:1008 sysfs_create_dir_ns+0xbe/0x1d0 fs/sysfs/dir.c:55 create_dir lib/kobject.c:71 [inline] kobject_add_internal.part.0.cold+0x114/0x5ae lib/kobject.c:229 kobject_add_internal lib/kobject.c:205 [inline] kobject_add_varg lib/kobject.c:364 [inline] kobject_add+0x11f/0x180 lib/kobject.c:409 kobject: 'hci1' (ffff888080326728): kobject_add_internal: parent: 'bluetooth', set: 'devices' device_add+0x383/0x1490 drivers/base/core.c:1809 kobject: 'hci3' (ffff88807d4ea768): kobject_add_internal: parent: 'bluetooth', set: 'devices' hci_register_dev+0x2d9/0x810 net/bluetooth/hci_core.c:3118 __vhci_create_device+0x2a6/0x560 drivers/bluetooth/hci_vhci.c:139 vhci_create_device drivers/bluetooth/hci_vhci.c:163 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:219 [inline] vhci_write+0x2a1/0x437 drivers/bluetooth/hci_vhci.c:299 call_write_iter include/linux/fs.h:1777 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x4a7/0x6b0 fs/read_write.c:482 kobject: 'hci4' (ffff888094b76668): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4' vfs_write+0x198/0x500 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xfd/0x230 fs/read_write.c:582 kobject: 'hci1' (ffff888080326728): kobject_uevent_env do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 kobject: 'hci4' (ffff888094b76668): kobject_cleanup, parent (null) RIP: 0033:0x441289 RSP: 002b:00007ffc9895ea08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441289 RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000000ef25 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402000 R13: 0000000000402090 R14: 0000000000000000 R15: 0000000000000000 Code: kobject: 'hci3' (ffff88807d4ea768): kobject_uevent_env 70 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9a 00 kobject: 'hci1' (ffff888080326728): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1' 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 70 48 8d 7b 08 48 89 fa 48 kobject: 'hci4' (ffff888094b76668): calling ktype release c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 6e kobject: 'hci3' (ffff88807d4ea768): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' f6 43 08 01 0f 85 09 fe ff RIP: kernfs_add_one+0x2cb/0x3a0 fs/kernfs/dir.c:794 RSP: ffff8880a58df980 kobject: 'hci4' (ffff88807d4367a8): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'rfkill504' (ffff888095d42ee8): kobject_add_internal: parent: 'hci1', set: 'devices' kobject: 'hci5' (ffff8880952827e8): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'hci4': free name kobject: 'hci4' (ffff88807d4367a8): kobject_uevent_env kobject: 'rfkill504' (ffff888095d42ee8): kobject_uevent_env kobject: 'hci5' (ffff8880952827e8): kobject_uevent_env kobject: 'rfkill504' (ffff888095d42ee8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1/rfkill504' kobject: 'hci4' (ffff88807d4367a8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci4' kobject: 'hci6' (ffff888093d76828): kobject_add_internal: parent: 'bluetooth', set: 'devices' kobject: 'hci5' (ffff8880952827e8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5' kobject: 'rfkill505' (ffff888095d42668): kobject_add_internal: parent: 'hci3', set: 'devices' ---[ end trace b43566f41a9fd557 ]--- kobject: 'rfkill505' (ffff888095d42668): kobject_uevent_env