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
CPU: 0 PID: 603 Comm: syz-executor5 Not tainted 4.19.0+ #318
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kernfs_add_one+0x342/0x4d0 fs/kernfs/dir.c:812
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
RSP: 0018:ffff880180e8f5d0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8801c2a8f8c0 RCX: ffffc9000c5d5000
RDX: 0000000000000001 RSI: ffffffff81f8e4ba RDI: 0000000000000008
RBP: ffff880180e8f618 R08: fffffbfff12cf9e1 R09: fffffbfff12cf9e0
R10: fffffbfff12cf9e0 R11: ffffffff8967cf07 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f6af3b8c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000001b8a68000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kernfs_create_dir_ns+0xf6/0x160 fs/kernfs/dir.c:1031
 sysfs_create_dir_ns+0x19b/0x340 fs/sysfs/dir.c:58
 create_dir lib/kobject.c:88 [inline]
 kobject_add_internal.cold.11+0x116/0x6af lib/kobject.c:247
 kobject_add_varg lib/kobject.c:382 [inline]
 kobject_add+0x13f/0x1b0 lib/kobject.c:426
 device_add+0x445/0x18e0 drivers/base/core.c:1879
 hci_register_dev+0x3b3/0x9c0 net/bluetooth/hci_core.c:3261
 __vhci_create_device+0x2c1/0x580 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+0x2de/0x470 drivers/bluetooth/hci_vhci.c:299
 call_write_iter include/linux/fs.h:1857 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6b8/0x9f0 fs/read_write.c:487
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 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+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6af3b8bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6af3b8c6d4
R13: 00000000004c5453 R14: 00000000004d8db8 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop0' (00000000c0e5f8e2): kobject_uevent_env
kobject: 'loop0' (00000000c0e5f8e2): fill_kobj_path: path = '/devices/virtual/block/loop0'
---[ end trace 4f5808440d4ebdd8 ]---
RIP: 0010:kernfs_add_one+0x342/0x4d0 fs/kernfs/dir.c:812
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
kobject: 'loop4' (00000000fa5a0573): kobject_uevent_env
kobject: 'bluetooth' (0000000054c7fe49): kobject_add_internal: parent: 'virtual', set: '(null)'
kobject: 'loop4' (00000000fa5a0573): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'hci0' (000000007119edce): kobject_add_internal: parent: 'bluetooth', set: 'devices'
kobject: 'loop3' (00000000e91ce852): kobject_uevent_env
RSP: 0018:ffff880180e8f5d0 EFLAGS: 00010202
kobject: 'hci0' (000000007119edce): kobject_uevent_env
kobject: 'loop3' (00000000e91ce852): fill_kobj_path: path = '/devices/virtual/block/loop3'
RAX: dffffc0000000000 RBX: ffff8801c2a8f8c0 RCX: ffffc9000c5d5000
kobject: 'loop2' (0000000048c56cbb): kobject_uevent_env
kobject: 'hci0' (000000007119edce): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0'
kobject: 'loop2' (0000000048c56cbb): fill_kobj_path: path = '/devices/virtual/block/loop2'
RDX: 0000000000000001 RSI: ffffffff81f8e4ba RDI: 0000000000000008
kobject: 'rfkill224' (00000000b51a7b36): kobject_add_internal: parent: 'hci0', set: 'devices'
RBP: ffff880180e8f618 R08: fffffbfff12cf9e1 R09: fffffbfff12cf9e0
kobject: 'loop0' (00000000c0e5f8e2): kobject_uevent_env
kobject: 'rfkill224' (00000000b51a7b36): kobject_uevent_env
R10: fffffbfff12cf9e0 R11: ffffffff8967cf07 R12: 0000000000000000
kobject: 'loop0' (00000000c0e5f8e2): fill_kobj_path: path = '/devices/virtual/block/loop0'
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
kobject: 'rfkill224' (00000000b51a7b36): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0/rfkill224'
kobject: 'loop4' (00000000fa5a0573): kobject_uevent_env
FS:  00007f6af3b8c700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
kobject: 'loop4' (00000000fa5a0573): fill_kobj_path: path = '/devices/virtual/block/loop4'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop0' (00000000c0e5f8e2): kobject_uevent_env
kobject: 'rfkill224' (00000000b51a7b36): kobject_uevent_env
kobject: 'loop0' (00000000c0e5f8e2): fill_kobj_path: path = '/devices/virtual/block/loop0'
CR2: 0000000000707158 CR3: 00000001b8a68000 CR4: 00000000001406f0
kobject: 'loop2' (0000000048c56cbb): kobject_uevent_env
kobject: 'rfkill224' (00000000b51a7b36): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0/rfkill224'
kobject: 'loop2' (0000000048c56cbb): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'hci2' (0000000080ed8c2b): kobject_add_internal: parent: 'bluetooth', set: 'devices'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'rfkill224' (00000000b51a7b36): kobject_cleanup, parent           (null)
kobject: 'loop4' (00000000fa5a0573): kobject_uevent_env
kobject: 'rfkill224' (00000000b51a7b36): calling ktype release
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'hci2' (0000000080ed8c2b): kobject_uevent_env
kobject: 'loop4' (00000000fa5a0573): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'rfkill224': free name