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INFO: trying to register non-static key in bt_accept_unlink

Status: upstream: reported on 2026/06/13 08:24
Subsystems: bluetooth
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+534002670dd34a114fdc@syzkaller.appspotmail.com
First crash: 6d00h, last: 6d00h
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
1ed92957-039b-4d25-b8a1-55d90d903099 assessment-security DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: trying to register non-static key in bt_accept_unlink 2026/06/11 00:02 2026/06/11 00:02 2026/06/11 01:35 416ea548b956322d21a679fe8e300a65581814ce
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Title Replies (including bot) Last reply
[syzbot] [bluetooth?] INFO: trying to register non-static key in bt_accept_unlink 0 (1) 2026/06/13 08:24

Sample crash report:
Bluetooth: hci1: hardware error 0x00
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 5637 Comm: kworker/u9:3 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: hci1 hci_error_reset
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:984
 register_lock_class+0xcc/0x2e0 kernel/locking/lockdep.c:1299
 __lock_acquire+0xad/0x2cf0 kernel/locking/lockdep.c:5112
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:182
 spin_lock_bh include/linux/spinlock.h:348 [inline]
 bt_accept_unlink+0x65/0x2c0 net/bluetooth/af_bluetooth.c:265
 l2cap_sock_teardown_cb+0x17e/0x490 net/bluetooth/l2cap_sock.c:1682
 l2cap_chan_del+0xb5/0x610 net/bluetooth/l2cap_core.c:658
 l2cap_conn_del+0x33d/0x570 net/bluetooth/l2cap_core.c:1804
 hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]
 hci_conn_hash_flush+0x10d/0x260 net/bluetooth/hci_conn.c:2736
 hci_dev_close_sync+0x85d/0x1150 net/bluetooth/hci_sync.c:5383
 hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]
 hci_error_reset+0x127/0x4c0 net/bluetooth/hci_core.c:998
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
 slab kmalloc-2k start ffff888029aaa000 pointer offset 1400 size 2048
list_del corruption. prev->next should be ffff8880682f5578, but was 0000000000000001. (prev=ffff888029aaa578)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:64!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5637 Comm: kworker/u9:3 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: hci1 hci_error_reset
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 6b e7 52 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 3c 8a 74 fd 49 8b 17 48 c7 c7 a0 be 28 8c 48 89 de 4c 89 f9 e8 e7 26 6b fc 90 <0f> 0b 4c 89 f7 e8 3c e7 52 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 0d
RSP: 0018:ffffc9000202f800 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff8880682f5578 RCX: 5386ffdc73148000
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1cfd240 R12: 1ffff110053554af
R13: dffffc0000000000 R14: ffff888029aaa578 R15: ffff888029aaa578
FS:  0000000000000000(0000) GS:ffff8881253a0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1552dd9062 CR3: 000000001f339000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:246 [inline]
 list_del_init include/linux/list.h:318 [inline]
 bt_accept_unlink+0x74/0x2c0 net/bluetooth/af_bluetooth.c:266
 l2cap_sock_teardown_cb+0x17e/0x490 net/bluetooth/l2cap_sock.c:1682
 l2cap_chan_del+0xb5/0x610 net/bluetooth/l2cap_core.c:658
 l2cap_conn_del+0x33d/0x570 net/bluetooth/l2cap_core.c:1804
 hci_disconn_cfm include/net/bluetooth/hci_core.h:2154 [inline]
 hci_conn_hash_flush+0x10d/0x260 net/bluetooth/hci_conn.c:2736
 hci_dev_close_sync+0x85d/0x1150 net/bluetooth/hci_sync.c:5383
 hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]
 hci_error_reset+0x127/0x4c0 net/bluetooth/hci_core.c:998
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 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+0x15a/0x190 lib/list_debug.c:62
Code: e8 6b e7 52 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 3c 8a 74 fd 49 8b 17 48 c7 c7 a0 be 28 8c 48 89 de 4c 89 f9 e8 e7 26 6b fc 90 <0f> 0b 4c 89 f7 e8 3c e7 52 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 0d
RSP: 0018:ffffc9000202f800 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff8880682f5578 RCX: 5386ffdc73148000
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1cfd240 R12: 1ffff110053554af
R13: dffffc0000000000 R14: ffff888029aaa578 R15: ffff888029aaa578
FS:  0000000000000000(0000) GS:ffff8881253a0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1552dd9062 CR3: 000000001f339000 CR4: 0000000000350ef0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/09 08:23 upstream 2d3090a8aeb5 656e94c6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: trying to register non-static key in bt_accept_unlink
* Struck through repros no longer work on HEAD.