------------[ cut here ]------------ workqueue: cannot queue hci_cmd_timeout on wq hci5 WARNING: kernel/workqueue.c:2437 at __queue_work+0xdfc/0x1360 kernel/workqueue.c:2436, CPU#0: swapper/0/0 Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026 RIP: 0010:__queue_work+0xe1a/0x1360 kernel/workqueue.c:2436 Code: 28 78 01 00 00 4c 8d 35 84 d6 31 10 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 12 aa b1 00 49 8b 77 18 4c 89 f7 48 8b 54 24 28 <67> 48 0f b9 3a 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 RSP: 0018:ffffc90000007be8 EFLAGS: 00010046 RAX: 1ffff1100686014e RBX: dffffc0000000000 RCX: ffffffff8fe8efc0 RDX: ffff88802c4b6978 RSI: ffffffff8af3aaa0 RDI: ffffffff91c0d6c0 RBP: 0000000000010000 R08: 0000000000000100 R09: 1ffffffff237c017 R10: dffffc0000000000 R11: ffffffff818f0970 R12: ffff88802c4b69c0 R13: 0000000000000008 R14: ffffffff91c0d6c0 R15: ffff888034300a58 FS: 0000000000000000(0000) GS:ffff888123409000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9cb3992080 CR3: 000000003f3b0000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1749 expire_timers kernel/time/timer.c:1795 [inline] __run_timers kernel/time/timer.c:2375 [inline] __run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2387 run_timer_base kernel/time/timer.c:2396 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2406 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669 __do_softirq kernel/softirq.c:703 [inline] invoke_softirq kernel/softirq.c:542 [inline] __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786 irq_exit_rcu+0x9/0x30 kernel/softirq.c:809 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: 4a 92 02 e9 03 18 03 00 cc cc cc 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 e3 da 23 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 RSP: 0018:ffffffff8fe07ca0 EFLAGS: 00000242 RAX: 0000000000e80a15 RBX: ffffffff819ca8c0 RCX: 8000000000000001 RDX: 0000000000000001 RSI: ffffffff8e6a82c4 RDI: ffffffff8c8ea380 RBP: ffffffff8fe07d78 R08: ffff8880b8233d9b R09: 1ffff110170467b3 R10: dffffc0000000000 R11: ffffed10170467b4 R12: 0000000000000000 R13: 1ffffffff1fd1df8 R14: 1ffffffff1fc0f9c R15: dffffc0000000000 arch_safe_halt arch/x86/kernel/process.c:767 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:768 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x2e0/0x540 kernel/sched/idle.c:355 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:458 rest_init+0x378/0x3a0 init/main.c:789 start_kernel+0x392/0x3e0 init/main.c:1247 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x157 ---------------- Code disassembly (best guess): 0: 28 78 01 sub %bh,0x1(%rax) 3: 00 00 add %al,(%rax) 5: 4c 8d 35 84 d6 31 10 lea 0x1031d684(%rip),%r14 # 0x1031d690 c: 48 89 f8 mov %rdi,%rax f: 48 c1 e8 03 shr $0x3,%rax 13: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 17: 74 05 je 0x1e 19: e8 12 aa b1 00 call 0xb1aa30 1e: 49 8b 77 18 mov 0x18(%r15),%rsi 22: 4c 89 f7 mov %r14,%rdi 25: 48 8b 54 24 28 mov 0x28(%rsp),%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 4c 89 f8 mov %r15,%rax 32: 48 c1 e8 03 shr $0x3,%rax 36: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 3a: 74 08 je 0x44 3c: 4c 89 ff mov %r15,%rdi 3f: e8 .byte 0xe8