------------[ cut here ]------------
WARNING: CPU: 1 PID: 10091 at fs/kernfs/dir.c:494 kernfs_get.part.0.cold+0x11/0x18 fs/kernfs/dir.c:494
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 10091 Comm: syz-executor.2 Not tainted 4.19.66 #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x263/0x507 kernel/panic.c:185
 __warn.cold+0x20/0x4a kernel/panic.c:540
kobject: 'loop0' (00000000fe52229c): kobject_uevent_env
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296
kobject: 'bluetooth' (0000000063126695): kobject_add_internal: parent: 'virtual', set: '(null)'
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037
RIP: 0010:kernfs_get.part.0.cold+0x11/0x18 fs/kernfs/dir.c:494
Code: ff e8 0c bd 9d ff 48 c7 c7 00 30 58 87 e8 74 24 88 ff 0f 0b e9 f5 a7 ff ff e8 f4 bc 9d ff 48 c7 c7 00 30 58 87 e8 5c 24 88 ff <0f> 0b e9 19 ac ff ff e8 dc bc 9d ff 48 c7 c7 00 30 58 87 e8 44 24
RSP: 0018:ffff8880a82ef838 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff8880800f8000 RCX: 0000000000000000
kobject: 'loop0' (00000000fe52229c): fill_kobj_path: path = '/devices/virtual/block/loop0'
RDX: 0000000000000000 RSI: ffffffff8155d916 RDI: ffffed101505def9
kobject: 'loop4' (000000009c71a90f): kobject_uevent_env
RBP: ffff8880a82ef848 R08: 0000000000000024 R09: ffffed1015d25079
R10: ffffed1015d25078 R11: ffff8880ae9283c7 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
kobject: 'hci1' (00000000ba87a4e0): kobject_add_internal: parent: 'bluetooth', set: 'devices'
 kernfs_get fs/kernfs/dir.c:493 [inline]
 kernfs_new_node+0xb8/0x130 fs/kernfs/dir.c:697
 kernfs_create_dir_ns+0x52/0x160 fs/kernfs/dir.c:1020
 sysfs_create_dir_ns+0x131/0x290 fs/sysfs/dir.c:58
kobject: 'hci1' (00000000ba87a4e0): kobject_uevent_env
 create_dir lib/kobject.c:88 [inline]
 kobject_add_internal lib/kobject.c:247 [inline]
 kobject_add_internal.cold+0xe5/0x5d1 lib/kobject.c:217
 kobject_add_varg lib/kobject.c:382 [inline]
 kobject_add+0x150/0x1c0 lib/kobject.c:426
 device_add+0x3cc/0x1760 drivers/base/core.c:1885
 hci_register_dev+0x304/0x880 net/bluetooth/hci_core.c:3198
 __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+0x2d6/0x470 drivers/bluetooth/hci_vhci.c:299
kobject: 'loop4' (000000009c71a90f): fill_kobj_path: path = '/devices/virtual/block/loop4'
 call_write_iter include/linux/fs.h:1820 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x587/0x810 fs/read_write.c:487
kobject: 'hci1' (00000000ba87a4e0): fill_kobj_path: path = '/devices/virtual/bluetooth/hci1'
 vfs_write+0x20c/0x560 fs/read_write.c:549
 ksys_write+0x14f/0x2d0 fs/read_write.c:599
 __do_sys_write fs/read_write.c:611 [inline]
 __se_sys_write fs/read_write.c:608 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:608
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: fd b7 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f83f6b30c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
kobject: 'loop1' (00000000685cf34c): kobject_uevent_env
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f83f6b316d4
R13: 00000000004c9bc3 R14: 00000000004e1310 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..