------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd3f/0x1040 kernel/workqueue.c:2296, CPU#1: kworker/u8:16/13799
Modules linked in:
CPU: 1 UID: 0 PID: 13799 Comm: kworker/u8:16 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xd67/0x1040 kernel/workqueue.c:2296
Code: a6 0e 49 8d 7d 18 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 0a de a3 00 49 8b 75 18 49 81 c7 70 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef
RSP: 0018:ffffc90000a08bd8 EFLAGS: 00010082
RAX: 1ffff1101392714e RBX: 0000000000000008 RCX: ffff888051653e00
RDX: ffff88803246f970 RSI: ffffffff8a9a7910 RDI: ffffffff903333b0
RBP: 0000000000000100 R08: ffffffff903034f7 R09: 1ffffffff206069e
R10: dffffc0000000000 R11: ffffffff818d37e0 R12: dffffc0000000000
R13: ffff88809c938a58 R14: ffffffff903333b0 R15: ffff88803246f970
FS: 0000000000000000(0000) GS:ffff8881253a0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005612ca514950 CR3: 0000000024f32000 CR4: 00000000003526f0
Call Trace:
call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1794 [inline]
__run_timers kernel/time/timer.c:2374 [inline]
__run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2386
run_timer_base kernel/time/timer.c:2395 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
handle_softirqs+0x22a/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lockdep_unregister_key+0x2d5/0x350 kernel/locking/lockdep.c:6616
Code: 91 0a 09 00 89 c6 48 c7 c7 30 58 40 96 e8 53 4f 08 0a 90 e9 65 fe ff ff e8 78 8c 05 0a 41 f7 c7 00 02 00 00 74 b3 fb 40 84 ed <75> b2 eb c3 90 0f 0b 90 e9 26 ff ff ff 90 0f 0b 90 e9 2e ff ff ff
RSP: 0018:ffffc9000d4df6e0 EFLAGS: 00000202
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000046
RDX: ffffffff93fbd398 RSI: ffffffff8dfbe90d RDI: ffffffff8c28b8e0
RBP: ffff888051653e01 R08: ffffffff81af2048 R09: ffffffff8e95cc20
R10: dffffc0000000000 R11: fffffbfff206069f R12: 0000000000000000
R13: ffff88805398da69 R14: 0000000000001000 R15: 0000000000000a07
qdisc_lock_uninit include/net/pkt_sched.h:332 [inline]
__qdisc_destroy+0x1ab/0x470 net/sched/sch_generic.c:1102
qdisc_put net/sched/sch_generic.c:1128 [inline]
dev_shutdown+0x34c/0x440 net/sched/sch_generic.c:1493
unregister_netdevice_many_notify+0x11b2/0x22c0 net/core/dev.c:12409
ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]
ops_undo_list+0x3d3/0x940 net/core/net_namespace.c:248
cleanup_net+0x56b/0x800 net/core/net_namespace.c:702
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
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 49 8d 7d 18 lea 0x18(%r13),%rdi
4: 48 89 f8 mov %rdi,%rax
7: 48 c1 e8 03 shr $0x3,%rax
b: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
10: 74 05 je 0x17
12: e8 0a de a3 00 call 0xa3de21
17: 49 8b 75 18 mov 0x18(%r13),%rsi
1b: 49 81 c7 70 01 00 00 add $0x170,%r15
22: 4c 89 f7 mov %r14,%rdi
25: 4c 89 fa mov %r15,%rdx
* 28: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2d: 4c 89 e8 mov %r13,%rax
30: 48 c1 e8 03 shr $0x3,%rax
34: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
39: 74 08 je 0x43
3b: 4c 89 ef mov %r13,%rdi