------------[ cut here ]------------ workqueue: cannot queue hci_cmd_timeout on wq hci0 WARNING: kernel/workqueue.c:2257 at 0x0, CPU#1: swapper/1/0 Modules linked in: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__queue_work+0xca1/0x10e0 kernel/workqueue.c:2256 Code: 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 0c 04 00 00 48 8d 3d 23 8a 04 0f 48 8b 75 18 <67> 48 0f b9 3a e9 90 f7 ff ff e8 40 b8 39 00 90 0f 0b 90 e9 15 f6 RSP: 0018:ffffc90000a08be8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: 0000000000000100 RCX: 1ffff1100f16d932 RDX: ffff88802891e978 RSI: ffffffff8a543f10 RDI: ffffffff9088b110 RBP: ffff888078b6c978 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000100 R11: 00000000ffffffff R12: 1ffff9200014118f R13: ffffffff81843830 R14: 0000000080000101 R15: ffff88802891e800 FS: 0000000000000000(0000) GS:ffff888124a9c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000269030 CR3: 000000005ae71000 CR4: 00000000003526f0 Call Trace: call_timer_fn+0x19a/0x5a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1794 [inline] __run_timers+0x569/0xae0 kernel/time/timer.c:2373 __run_timer_base kernel/time/timer.c:2385 [inline] __run_timer_base kernel/time/timer.c:2377 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2394 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2404 handle_softirqs+0x219/0x8b0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82 Code: 66 76 02 e9 d3 2f 03 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 d3 2b 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffc90000197de8 EFLAGS: 000002c2 RAX: 0000000006650c59 RBX: 0000000000000001 RCX: ffffffff8b5e86f9 RDX: 0000000000000000 RSI: ffffffff8daa2b8e RDI: ffffffff8bf1cd00 RBP: ffffed1003b55498 R08: 0000000000000001 R09: ffffed10170a672d R10: ffff8880b853396b R11: 00000000ffffffff R12: 0000000000000001 R13: ffff88801daaa4c0 R14: ffffffff9085c3d0 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x38d/0x510 kernel/sched/idle.c:332 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:312 common_startup_64+0x13e/0x148 ---------------- Code disassembly (best guess): 0: 78 01 js 0x3 2: 00 00 add %al,(%rax) 4: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax b: fc ff df e: 48 89 f9 mov %rdi,%rcx 11: 48 c1 e9 03 shr $0x3,%rcx 15: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 19: 0f 85 0c 04 00 00 jne 0x42b 1f: 48 8d 3d 23 8a 04 0f lea 0xf048a23(%rip),%rdi # 0xf048a49 26: 48 8b 75 18 mov 0x18(%rbp),%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 90 f7 ff ff jmp 0xfffff7c4 34: e8 40 b8 39 00 call 0x39b879 39: 90 nop 3a: 0f 0b ud2 3c: 90 nop 3d: e9 .byte 0xe9 3e: 15 .byte 0x15 3f: f6 .byte 0xf6