Re: [PATCH] usb: core: prevent double URB enqueue causing list corruption

[Shuah Khan]

On 10/31/25 08:13, Alan Stern wrote:
> On Fri, Oct 31, 2025 at 02:59:07PM +0100, Greg KH wrote:
> > On Fri, Oct 31, 2025 at 07:17:39PM +0530, vsshingne wrote:
> > > Prevents the same URB from being enqueued twice on the same endpoint,
> > > which could lead to list corruption detected by list_debug.c.
> > >
> > > This was observed in syzbot reports where URBs were re-submitted
> > > before completion, triggering 'list_add double add' errors.
> > >
> > > Adding a check to return -EEXIST if the URB is already on a queue
> > > prevents this corruption.
> >
> > This text makes no sense at all, it does not describe what this patch
> > does in any way.  Please do not use AI to generate patches.
>
> In fact, the patch doesn't do _anything_ (except maybe change some
> whitespace).  And it does not apply to any recent kernel source.

Agree - this patch does nothing. Looks like the patch isn't sent
to right people either.

This person happens to be in the mentorship program - I will make
sure they won't send such patches in the future.

thanks,
-- Shuah