ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
 non-slab/vmalloc memory
list_del corruption. prev->next should be ffffc9000eab7be0, but was ffff8880361840a8. (prev=ffff8880361840a8)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:62!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 14455 Comm: khidpd_00020006 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:__list_del_entry_valid_or_report+0x14a/0x1d0 lib/list_debug.c:62
Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 c0 37 fa 8b e8 77 45 34 fc 90 <0f> 0b 4c 89 e7 e8 3c 9b 5d fd 48 89 ea 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000eab7ab0 EFLAGS: 00010086
RAX: 000000000000006d RBX: ffffc9000eab7be0 RCX: 0000000000000000
RDX: 000000000000006d RSI: ffffffff81e5b6c9 RDI: fffff52001d56f47
RBP: ffff8880361840a8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 6c65645f7473696c R12: ffff8880361840a8
R13: 0000000000000246 R14: ffffc9000eab7be0 R15: ffff888036610000
FS:  0000000000000000(0000) GS:ffff8881245dc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d03dde1b4 CR3: 000000005ddf6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:223 [inline]
 list_del include/linux/list.h:237 [inline]
 __mutex_remove_waiter+0x1a/0x1a0 kernel/locking/mutex.c:221
 __mutex_lock_common kernel/locking/mutex.c:742 [inline]
 __mutex_lock+0x828/0x1b90 kernel/locking/mutex.c:776
 l2cap_unregister_user+0x71/0x240 net/bluetooth/l2cap_core.c:1729
 hidp_session_thread+0x459/0x680 net/bluetooth/hidp/core.c:1304
 kthread+0x3b3/0x730 kernel/kthread.c:463
 ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x14a/0x1d0 lib/list_debug.c:62
Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 c0 37 fa 8b e8 77 45 34 fc 90 <0f> 0b 4c 89 e7 e8 3c 9b 5d fd 48 89 ea 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000eab7ab0 EFLAGS: 00010086
RAX: 000000000000006d RBX: ffffc9000eab7be0 RCX: 0000000000000000
RDX: 000000000000006d RSI: ffffffff81e5b6c9 RDI: fffff52001d56f47
RBP: ffff8880361840a8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 6c65645f7473696c R12: ffff8880361840a8
R13: 0000000000000246 R14: ffffc9000eab7be0 R15: ffff888036610000
FS:  0000000000000000(0000) GS:ffff8881245dc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d03dde1b4 CR3: 000000005ddf6000 CR4: 0000000000350ef0