syzbot

 non-paged memory
list_del corruption, ffff8880288d6100->next is LIST_POISON1 (dead000000000100)
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kernel BUG at lib/list_debug.c:58!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5848 Comm: kworker/u9:7 Not tainted 6.14.0-syzkaller-05877-g1a9239bb4253 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: hci6 hci_conn_timeout
RIP: 0010:__list_del_entry_valid_or_report+0x10f/0x190 lib/list_debug.c:56
Code: 00 f9 a0 8c 4c 89 fe e8 6f 9e 23 fc 90 0f 0b 48 89 df e8 94 09 06 fd 48 c7 c7 60 f9 a0 8c 4c 89 fe 48 89 da e8 52 9e 23 fc 90 <0f> 0b 48 89 df e8 77 09 06 fd 48 c7 c7 c0 f9 a0 8c 4c 89 fe 48 89
RSP: 0018:ffffc9000339fa28 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 8688ec4cc9eec700
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff8880288d6120 R08: ffffffff81a2ae7c R09: fffffbfff1d7a73c
R10: dffffc0000000000 R11: fffffbfff1d7a73c R12: dead000000000122
R13: dffffc0000000000 R14: dead000000000100 R15: ffff8880288d6100
FS:  0000000000000000(0000) GS:ffff88812510f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f318fda3f98 CR3: 000000004b056000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 _hci_cmd_sync_cancel_entry net/bluetooth/hci_sync.c:647 [inline]
 hci_cmd_sync_cancel_entry net/bluetooth/hci_sync.c:851 [inline]
 hci_cmd_sync_dequeue_once+0x262/0x360 net/bluetooth/hci_sync.c:870
 hci_cancel_connect_sync+0xc3/0x120 net/bluetooth/hci_sync.c:-1
 hci_abort_conn+0x194/0x330 net/bluetooth/hci_conn.c:3060
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac5/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd30 kernel/workqueue.c:3400
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x10f/0x190 lib/list_debug.c:56
Code: 00 f9 a0 8c 4c 89 fe e8 6f 9e 23 fc 90 0f 0b 48 89 df e8 94 09 06 fd 48 c7 c7 60 f9 a0 8c 4c 89 fe 48 89 da e8 52 9e 23 fc 90 <0f> 0b 48 89 df e8 77 09 06 fd 48 c7 c7 c0 f9 a0 8c 4c 89 fe 48 89
RSP: 0018:ffffc9000339fa28 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 8688ec4cc9eec700
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffff8880288d6120 R08: ffffffff81a2ae7c R09: fffffbfff1d7a73c
R10: dffffc0000000000 R11: fffffbfff1d7a73c R12: dead000000000122
R13: dffffc0000000000 R14: dead000000000100 R15: ffff8880288d6100
FS:  0000000000000000(0000) GS:ffff88812500f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564d5c34ef50 CR3: 000000004b510000 CR4: 0000000000350ef0