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

[Jiri Slaby]

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.)

thanks,
--
js
suse labs