------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci4
WARNING: CPU: 0 PID: 5868 at kernel/workqueue.c:2256 __queue_work+0xd38/0xfb0 kernel/workqueue.c:2254
Modules linked in:
CPU: 0 UID: 0 PID: 5868 Comm: syz-executor Not tainted 6.16.0-syzkaller-12128-g875c541ea680 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__queue_work+0xd38/0xfb0 kernel/workqueue.c:2254
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 83 06 99 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 20 df 89 8b 4c 89 fa e8 49 3a f9 ff 90 <0f> 0b 90 90 e9 1a f5 ff ff e8 ba 9b 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc90000007b10 EFLAGS: 00010046
RAX: bce3e02fc18a2600 RBX: 0000000000000100 RCX: ffff88802c470000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff11004d7e038 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: dffffc0000000000
R13: ffff88807f1a4988 R14: 0000000000000008 R15: ffff888026bf0178
FS: 0000000000000000(0000) GS:ffff888125c21000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33813ff8 CR3: 000000000df36000 CR4: 00000000003526f0
Call Trace:
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1793 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x646/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:debug_lockdep_rcu_enabled+0x2a/0x40 kernel/rcu/update.c:321
Code: f3 0f 1e fa 31 c0 83 3d 57 8a 2a 04 00 74 1e 83 3d 7a ba 2a 04 00 74 15 65 48 8b 0c 25 08 f0 9f 92 31 c0 83 b9 ec 0a 00 00 00 <0f> 94 c0 e9 ce dc 02 00 cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc900041ef110 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff9041a701 RCX: ffff88802c470000
RDX: ffffc900041ef201 RSI: dffffc0000000000 RDI: ffffc900041ef1f0
RBP: dffffc0000000000 R08: ffffc900041efc50 R09: 0000000000000000
R10: ffffc900041ef238 R11: fffff5200083de49 R12: ffffc900041efc60
R13: ffffc900041e8000 R14: ffffc900041ef1e8 R15: ffffffff8172c195
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x195c/0x2390 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:330 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4281
kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:578
__alloc_skb+0x142/0x2d0 net/core/skbuff.c:669
alloc_skb include/linux/skbuff.h:1336 [inline]
nlmsg_new include/net/netlink.h:1055 [inline]
rtmsg_ifa+0xf8/0x1f0 net/ipv4/devinet.c:2015
__inet_del_ifa+0x869/0x1040 net/ipv4/devinet.c:450
inet_del_ifa net/ipv4/devinet.c:488 [inline]
inetdev_destroy net/ipv4/devinet.c:328 [inline]
inetdev_event+0x632/0x15b0 net/ipv4/devinet.c:1656
notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
call_netdevice_notifiers net/core/dev.c:2281 [inline]
unregister_netdevice_many_notify+0x14d7/0x1ff0 net/core/dev.c:12148
unregister_netdevice_many net/core/dev.c:12211 [inline]
unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12055
unregister_netdevice include/linux/netdevice.h:3382 [inline]
__tun_detach+0xda4/0x1560 drivers/net/tun.c:621
tun_detach drivers/net/tun.c:637 [inline]
tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3433
__fput+0x44c/0xa70 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
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111
x64_sys_call+0x21f7/0x2200 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4cb278ebe9
Code: Unable to access opcode bytes at 0x7f4cb278ebbf.
RSP: 002b:00007fff7bfdf7a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4cb2813653 RCX: 00007f4cb278ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007f4cb2813665 R08: 00007fff7bfdd547 R09: 00000000000927c0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00000000000927c0 R14: 000000000001c714 R15: 00007fff7bfdf950
----------------
Code disassembly (best guess):
0: f3 0f 1e fa endbr64
4: 31 c0 xor %eax,%eax
6: 83 3d 57 8a 2a 04 00 cmpl $0x0,0x42a8a57(%rip) # 0x42a8a64
d: 74 1e je 0x2d
f: 83 3d 7a ba 2a 04 00 cmpl $0x0,0x42aba7a(%rip) # 0x42aba90
16: 74 15 je 0x2d
18: 65 48 8b 0c 25 08 f0 mov %gs:0xffffffff929ff008,%rcx
1f: 9f 92
21: 31 c0 xor %eax,%eax
23: 83 b9 ec 0a 00 00 00 cmpl $0x0,0xaec(%rcx)
* 2a: 0f 94 c0 sete %al <-- trapping instruction
2d: e9 ce dc 02 00 jmp 0x2dd00
32: cc int3
33: cc int3
34: cc int3
35: cc int3
36: cc int3
37: cc int3
38: cc int3
39: cc int3
3a: cc int3
3b: cc int3
3c: cc int3
3d: cc int3
3e: cc int3
3f: cc int3