Re: [PATCH] tty: ipwireless: Fix use-after-free in tasklet during device removal

[David Sterba]

On Tue, Feb 17, 2026 at 09:03:25AM +0100, Jiri Slaby wrote:
> Hi,
> 
> On 09. 02. 26, 11:21, David Sterba wrote:
> > On Sun, Feb 08, 2026 at 06:25:38PM +0100, Jiri Kosina wrote:
> >> On Sun, 8 Feb 2026, Greg KH wrote:
> >>
> >>>> I don't have the real hardware. In order to reproduce the bug, I simulate
> >>>> the IPWireless PCMCIA card in the qemu by allocating and configuring the
> >>>> necessary resources(I/O ports, memory regions, interrupts and so on) to
> >>>> correspond with the hardware expected by the driver in the initialization
> >>>> code of the virtual device.
> >>>
> >>> I wonder if this device even is still around, given that pcmcia is all
> >>> but dead for a very long time.
> >>
> >> I doubt that this device is still around anywhere where reasonably new
> >> kernels (including LTS) would matter.
> >>
> >> I don't think I've seen this device (which was back then donated to me by
> >> T-Mobile CZ in order to get it supported in Linux, and I am not sure how
> >> much global adoption it got afterwards) for, let's say, past 15 years :)
> >>
> >> I think (let's see what David, ho took the maintainership over for me
> >> afterwards, has to say) we'd better deprecate and drop the whole thing,
> >> rather than trying to pretend that it's still actively being taken care
> >> of.
> > 
> > https://lore.kernel.org/all/20230223172403.GW10580@xxxxxxx/ last time
> > the question of keeping the driver was asked (2023). Back then I was
> > able to find the cards on second hand market but now I can't on a local
> > market and there's exactly one hit on global eBay.
> > 
> > Local linux related or telco support forums seem to mention the driver
> > until 2011 (root.cz, abclinuxu.cz, t-mobile.cz). It does not prove
> > nobody is using it but I think the chances are quite low to justify
> > keeping the driver.  It is simple enough to be built as an external
> > module eventually, I can help with that in case somebody really needs
> > that.
> 
> So, would you want to submit the removal? Or anyone else, if you don't 
> want to lose time with this? (I can do that, if noone wants to.)

Let me do it after rc1 so I can finish the journey of this driver which
was my first nontrivial contribution to linux kernel.