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: 1 PID: 9459 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #69
IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, id = 0
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:ffff88804863f858 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010884000
RDX: 0000000000000001 RSI: ffffffff81d251db RDI: 0000000000000008
RBP: ffff88804863f898 R08: 1ffffffff1151204 R09: fffffbfff1151205
kobject: 'loop0' (00000000d63d4ff5): kobject_uevent_env
R10: fffffbfff1151204 R11: ffffffff88a89027 R12: ffff88809158ab60
R13: ffff88809158ab60 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb74d91b700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000a5af8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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: 'loop0' (00000000d63d4ff5): fill_kobj_path: path = '/devices/virtual/block/loop0'
 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
kobject: 'brif' (000000008876e0a4): kobject_cleanup, parent 00000000239d558f
 hci_register_dev+0x304/0x880 net/bluetooth/hci_core.c:3261
 __vhci_create_device+0x2d0/0x5a0 drivers/bluetooth/hci_vhci.c:139
kobject: 'nullb0' (000000000a7133cd): kobject_uevent_env
 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
kobject: 'brif' (000000008876e0a4): auto cleanup kobject_del
kobject: 'nullb0' (000000000a7133cd): fill_kobj_path: path = '/devices/virtual/block/nullb0'
 vfs_write+0x20c/0x580 fs/read_write.c:549
kobject: 'brif' (000000008876e0a4): calling ktype release
 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: 0033:0x457e39
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:00007fb74d91ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39
RDX: 0000000000000002 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb74d91b6d4
R13: 00000000004c7452 R14: 00000000004dcff0 R15: 00000000ffffffff
Modules linked in:
---[ end trace 2ed356d0e3f26c6a ]---
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
kobject: (000000008876e0a4): dynamic_kobj_release
kobject: 'loop2' (000000003b36d124): kobject_uevent_env
kobject: 'loop2' (000000003b36d124): fill_kobj_path: path = '/devices/virtual/block/loop2'
RSP: 0018:ffff88804863f858 EFLAGS: 00010202
------------[ cut here ]------------
downgrading a read lock
WARNING: CPU: 0 PID: 7685 at kernel/locking/lockdep.c:3553 __lock_downgrade kernel/locking/lockdep.c:3553 [inline]
WARNING: CPU: 0 PID: 7685 at kernel/locking/lockdep.c:3553 lock_downgrade+0x478/0x810 kernel/locking/lockdep.c:3816