slab kmalloc-2k start ffff8880371c9000 pointer offset 1888 size 2048
list_del corruption. prev->next should be ffff88803bc76760, but was 0000000000000000. (prev=ffff8880371c9760)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:64!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8184 Comm: syz.3.604 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 eb cb 3e fd 43 80 3c 2c 00 74 08 4c 89 ff e8 2c e9 5d fd 49 8b 17 48 c7 c7 20 11 62 8b 48 89 de 4c 89 f9 e8 87 a6 67 fc 90 <0f> 0b 4c 89 f7 e8 bc cb 3e fd 43 80 3c 2c 00 74 08 4c 89 ff e8 fd
RSP: 0018:ffffc900041a7680 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88803bc76760 RCX: 9c19a85fe011fd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88803bc77010 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017124863 R12: 1ffff11006e392ec
R13: dffffc0000000000 R14: ffff8880371c9760 R15: ffff8880371c9760
FS:  0000000000000000(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6e7e685c0 CR3: 000000003f800000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del_init include/linux/list.h:287 [inline]
 bt_accept_unlink+0x39/0x240 net/bluetooth/af_bluetooth.c:259
 l2cap_sock_teardown_cb+0x17e/0x460 net/bluetooth/l2cap_sock.c:1613
 l2cap_chan_del+0xb5/0x5e0 net/bluetooth/l2cap_core.c:655
 l2cap_conn_del+0x388/0x680 net/bluetooth/l2cap_core.c:1787
 hci_disconn_cfm include/net/bluetooth/hci_core.h:2097 [inline]
 hci_conn_hash_flush+0x10a/0x230 net/bluetooth/hci_conn.c:2575
 hci_dev_close_sync+0xaef/0x1330 net/bluetooth/hci_sync.c:5294
 hci_dev_do_close net/bluetooth/hci_core.c:501 [inline]
 hci_unregister_dev+0x21a/0x510 net/bluetooth/hci_core.c:2715
 vhci_release+0x83/0xe0 drivers/bluetooth/hci_vhci.c:665
 __fput+0x45b/0xa80 fs/file_table.c:468
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:961
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe0b3f6ebe9
Code: Unable to access opcode bytes at 0x7fe0b3f6ebbf.
RSP: 002b:00007fe0b21ce038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000028 RBX: 00007fe0b4195fa0 RCX: 00007fe0b3f6ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000007
RBP: 00007fe0b3ff1e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe0b4196038 R14: 00007fe0b4195fa0 R15: 00007ffd5b732198
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 eb cb 3e fd 43 80 3c 2c 00 74 08 4c 89 ff e8 2c e9 5d fd 49 8b 17 48 c7 c7 20 11 62 8b 48 89 de 4c 89 f9 e8 87 a6 67 fc 90 <0f> 0b 4c 89 f7 e8 bc cb 3e fd 43 80 3c 2c 00 74 08 4c 89 ff e8 fd
RSP: 0018:ffffc900041a7680 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff88803bc76760 RCX: 9c19a85fe011fd00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88803bc77010 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017124863 R12: 1ffff11006e392ec
R13: dffffc0000000000 R14: ffff8880371c9760 R15: ffff8880371c9760
FS:  0000000000000000(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6e7e685c0 CR3: 000000003f800000 CR4: 00000000003526f0