[syzbot] BUG: corrupted list in hci_register_dev

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: b27a3ca08ba7 Add linux-next specific files for 20220829
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15a9cf13080000
kernel config: https://syzkaller.appspot.com/x/.config?x=e2eb01587c47db4c
dashboard link: https://syzkaller.appspot.com/bug?extid=e32111a3390bdf27b0c9
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e32111...@syzkaller.appspotmail.com

list_add corruption. prev->next should be next (ffff888145f20188), but was ffff88807c3000c8. (prev=ffff88807cf2d8c8).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:30!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 18538 Comm: kworker/1:19 Not tainted 6.0.0-rc3-next-20220829-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events vhci_open_timeout
RIP: 0010:__list_add_valid.cold+0x56/0x58 lib/list_debug.c:30
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 00 31 49 8a e8 76 d5 f0 ff 0f 0b 48 89 f1 48 c7 c7 80 30 49 8a 4c 89 e6 e8 62 d5 f0 ff <0f> 0b 4c 89 e1 48 89 ee 48 c7 c7 e0 32 49 8a e8 4e d5 f0 ff 0f 0b
RSP: 0018:ffffc90005ed7af0 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff88806558fcc0 RCX: 0000000000000000
RDX: ffff88807e7a8000 RSI: ffffffff816204f8 RDI: fffff52000bdaf50
RBP: ffff88806558fcc8 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000000000001 R11: 6464615f7473696c R12: ffff888145f20188
R13: ffff88807cf2d8c8 R14: ffff888145f20190 R15: ffff888145f20188
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcdeb19cd0 CR3: 000000000bc8e000 CR4: 00000000003526e0
Call Trace:
<TASK>
__list_add include/linux/list.h:69 [inline]
list_add_tail include/linux/list.h:102 [inline]
add_tail lib/klist.c:104 [inline]
klist_add_tail+0x158/0x2a0 lib/klist.c:137
device_add+0xda7/0x1e90 drivers/base/core.c:3534
hci_register_dev+0x2f6/0xbb0 net/bluetooth/hci_core.c:2593
__vhci_create_device+0x393/0x7d0 drivers/bluetooth/hci_vhci.c:336
vhci_create_device drivers/bluetooth/hci_vhci.c:374 [inline]
vhci_open_timeout+0x38/0x50 drivers/bluetooth/hci_vhci.c:531
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid.cold+0x56/0x58 lib/list_debug.c:30
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 00 31 49 8a e8 76 d5 f0 ff 0f 0b 48 89 f1 48 c7 c7 80 30 49 8a 4c 89 e6 e8 62 d5 f0 ff <0f> 0b 4c 89 e1 48 89 ee 48 c7 c7 e0 32 49 8a e8 4e d5 f0 ff 0f 0b
RSP: 0018:ffffc90005ed7af0 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff88806558fcc0 RCX: 0000000000000000
RDX: ffff88807e7a8000 RSI: ffffffff816204f8 RDI: fffff52000bdaf50
RBP: ffff88806558fcc8 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000000000001 R11: 6464615f7473696c R12: ffff888145f20188
R13: ffff88807cf2d8c8 R14: ffff888145f20190 R15: ffff888145f20188
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcdeb19cd0 CR3: 000000000bc8e000 CR4: 00000000003526e0


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.