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: 13948 Comm: syz-executor4 Not tainted 4.20.0+ #6
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:ffff88806ab2f0c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90011b14000
RDX: 0000000000000001 RSI: ffffffff81faf99b RDI: 0000000000000008
RBP: ffff88806ab2f100 R08: 1ffffffff135078c R09: fffffbfff135078d
R10: fffffbfff135078c R11: ffffffff89a83c67 R12: ffff88806cf93380
R13: ffff88806cf93380 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc2ed59d700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf83069028 CR3: 00000000897f0000 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+0x192/0x330 fs/sysfs/dir.c:58
kobject: 'loop5' (0000000086421f3f): kobject_uevent_env
kobject: 'loop5' (0000000086421f3f): fill_kobj_path: path = '/devices/virtual/block/loop5'
 create_dir lib/kobject.c:88 [inline]
 kobject_add_internal lib/kobject.c:247 [inline]
 kobject_add_internal.cold+0x129/0x6d8 lib/kobject.c:217
kobject: 'loop1' (00000000584d0540): kobject_uevent_env
kobject: 'loop1' (00000000584d0540): fill_kobj_path: path = '/devices/virtual/block/loop1'
 kobject_add_varg lib/kobject.c:382 [inline]
 kobject_add+0x150/0x1c0 lib/kobject.c:426
 device_add+0x3d9/0x1800 drivers/base/core.c:1912
 hci_register_dev+0x3b9/0x9d0 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:1862 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x764/0xb40 fs/read_write.c:487
 __kernel_write+0x110/0x3b0 fs/read_write.c:506
 write_pipe_buf+0x180/0x240 fs/splice.c:797
kobject: 'loop2' (000000001d6599c7): kobject_uevent_env
kobject: 'loop2' (000000001d6599c7): fill_kobj_path: path = '/devices/virtual/block/loop2'
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x39a/0x7e0 fs/splice.c:627
 splice_from_pipe+0x1ea/0x310 fs/splice.c:662
 default_file_splice_write+0x3c/0x90 fs/splice.c:809
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x126/0x1a0 fs/splice.c:1023
 splice_direct_to_actor+0x3be/0x9d0 fs/splice.c:978
kobject: 'loop0' (0000000046e99f92): kobject_uevent_env
kobject: 'loop0' (0000000046e99f92): fill_kobj_path: path = '/devices/virtual/block/loop0'
 do_splice_direct+0x2c7/0x420 fs/splice.c:1066
 do_sendfile+0x61a/0xe60 fs/read_write.c:1439
 __do_sys_sendfile64 fs/read_write.c:1494 [inline]
 __se_sys_sendfile64 fs/read_write.c:1486 [inline]
 __x64_sys_sendfile64+0x15a/0x240 fs/read_write.c:1486
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: 6d 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc2ed59cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9
RDX: 0000000020d83ff8 RSI: 0000000000000005 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 00007fc2ed59d6d4
R13: 00000000004c4b6b R14: 00000000004d8278 R15: 00000000ffffffff
Modules linked in:
---[ end trace defc83fd22248f08 ]---
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:ffff88806ab2f0c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90011b14000
RDX: 0000000000000001 RSI: ffffffff81faf99b RDI: 0000000000000008
RBP: ffff88806ab2f100 R08: 1ffffffff135078c R09: fffffbfff135078d
R10: fffffbfff135078c R11: ffffffff89a83c67 R12: ffff88806cf93380
R13: ffff88806cf93380 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc2ed59d700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf83069028 CR3: 00000000897f0000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400