kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 11661 Comm: syz-executor.0 Not tainted 5.0.0-rc7+ #78
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kernfs_add_one+0x343/0x4d0 fs/kernfs/dir.c:812
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 70 48 8d 7b 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1f 01 00 00 8b 5b 08 31 ff 83
RSP: 0018:ffff8880882af858 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000800c000
RDX: 0000000000000001 RSI: ffffffff81d2548b RDI: 0000000000000008
RBP: ffff8880882af898 R08: 1ffffffff115123c R09: fffffbfff115123d
R10: fffffbfff115123c R11: ffffffff88a891e7 R12: ffff88808d954b60
R13: ffff88808d954b60 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fe55d8d4700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000012cc978 CR3: 000000005b328000 CR4: 00000000001426e0
Call Trace:
 kernfs_create_dir_ns+0xff/0x160 fs/kernfs/dir.c:1031
 sysfs_create_dir_ns+0x131/0x2a0 fs/sysfs/dir.c:59
kobject: 'kvm' (00000000292cb23e): kobject_uevent_env
kobject: 'kvm' (00000000292cb23e): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 create_dir lib/kobject.c:88 [inline]
 kobject_add_internal lib/kobject.c:247 [inline]
 kobject_add_internal.cold+0xe5/0x5d4 lib/kobject.c:217
 kobject_add_varg lib/kobject.c:382 [inline]
 kobject_add+0x150/0x1c0 lib/kobject.c:426
 device_add+0x3d5/0x1870 drivers/base/core.c:1912
 hci_register_dev+0x304/0x880 net/bluetooth/hci_core.c:3261
 __vhci_create_device+0x2d0/0x5a0 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+0x2d0/0x470 drivers/bluetooth/hci_vhci.c:299
 call_write_iter include/linux/fs.h:1863 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x613/0x8e0 fs/read_write.c:487
 vfs_write+0x20c/0x580 fs/read_write.c:549
 ksys_write+0xea/0x1f0 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe55d8d3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29
RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000007
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe55d8d46d4
R13: 00000000004c6e8b R14: 00000000004dc700 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop5' (00000000991e7596): kobject_uevent_env
kobject: 'loop5' (00000000991e7596): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (00000000292cb23e): kobject_uevent_env
kobject: 'loop3' (00000000b10e9779): kobject_uevent_env
kobject: 'loop3' (00000000b10e9779): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'bluetooth' (00000000124cf0ad): kobject_add_internal: parent: 'virtual', set: '(null)'
kobject: 'kvm' (00000000292cb23e): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (000000000f39c2d6): kobject_uevent_env
kobject: 'hci0' (00000000673bb9c8): kobject_add_internal: parent: 'bluetooth', set: 'devices'
kobject: 'loop1' (000000000f39c2d6): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (00000000292cb23e): kobject_uevent_env
kobject: 'hci0' (00000000673bb9c8): kobject_uevent_env
kobject: 'loop5' (00000000991e7596): kobject_uevent_env
kobject: 'kvm' (00000000292cb23e): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'hci0' (00000000673bb9c8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0'
---[ end trace e7844087a29b8737 ]---
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
RIP: 0010:kernfs_add_one+0x343/0x4d0 fs/kernfs/dir.c:812
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000991e7596): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'rfkill40' (00000000a829acb3): kobject_add_internal: parent: 'hci0', set: 'devices'
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 70 48 8d 7b 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1f 01 00 00 8b 5b 08 31 ff 83
kobject: 'rfkill40' (00000000a829acb3): kobject_uevent_env
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000b10e9779): kobject_uevent_env
kobject: 'loop3' (00000000b10e9779): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'rfkill40' (00000000a829acb3): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0/rfkill40'
RSP: 0018:ffff8880882af858 EFLAGS: 00010202
kobject: 'hci2' (00000000078db7bc): kobject_add_internal: parent: 'bluetooth', set: 'devices'
kobject: 'rfkill40' (00000000a829acb3): kobject_uevent_env
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'rfkill40' (00000000a829acb3): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0/rfkill40'
kobject: 'hci2' (00000000078db7bc): kobject_uevent_env
kobject: 'hci2' (00000000078db7bc): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2'
kobject: 'rfkill40' (00000000a829acb3): kobject_cleanup, parent           (null)
kobject: 'rfkill41' (0000000063e91eba): kobject_add_internal: parent: 'hci2', set: 'devices'
kobject: 'rfkill41' (0000000063e91eba): kobject_uevent_env
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
kobject: 'rfkill41' (0000000063e91eba): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2/rfkill41'
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
kobject: 'rfkill40' (00000000a829acb3): calling ktype release
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'rfkill40': free name
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000800c000
kobject: 'loop5' (00000000991e7596): kobject_uevent_env
kobject: 'hci0' (00000000673bb9c8): kobject_uevent_env
kobject: 'loop5' (00000000991e7596): fill_kobj_path: path = '/devices/virtual/block/loop5'
RDX: 0000000000000001 RSI: ffffffff81d2548b RDI: 0000000000000008
kobject: 'loop2' (000000002cb47a9e): kobject_uevent_env
kobject: 'loop2' (000000002cb47a9e): fill_kobj_path: path = '/devices/virtual/block/loop2'
RBP: ffff8880882af898 R08: 1ffffffff115123c R09: fffffbfff115123d
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
kobject: 'hci0' (00000000673bb9c8): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0'
kobject: 'hci0' (00000000673bb9c8): kobject_cleanup, parent           (null)
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
R10: fffffbfff115123c R11: ffffffff88a891e7 R12: ffff88808d954b60
kobject: 'hci0' (00000000673bb9c8): calling ktype release
R13: ffff88808d954b60 R14: 0000000000000000 R15: 0000000000000000
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
FS:  00007fe55d8d4700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'hci0': free name
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop4' (0000000007209b27): kobject_uevent_env
CR2: 000000000070a158 CR3: 000000005b328000 CR4: 00000000001426f0
kobject: 'loop4' (0000000007209b27): fill_kobj_path: path = '/devices/virtual/block/loop4'