[syzbot] [wireless?] INFO: task hung in reg_todo (4)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 9448598b22c5 Linux 6.19-rc2
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=111ad392580000
kernel config: https://syzkaller.appspot.com/x/.config?x=a94030c847137a18
dashboard link: https://syzkaller.appspot.com/bug?extid=8f72a490f8e8879ee7e6
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1007c3c2580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17d4808a580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/477361b600ee/disk-9448598b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d6a6291ae36e/vmlinux-9448598b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0c0e810e0acf/bzImage-9448598b.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8f72a4...@syzkaller.appspotmail.com

INFO: task kworker/0:0:9 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:23672 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events reg_todo
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x149b/0x4fd0 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:776
reg_todo+0x1c/0xa60 net/wireless/reg.c:3189


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