Re: [PATCH v5 6/7] vdpa: solidrun: Fix UB bug with devres

[Michael S. Tsirkin]

On Thu, Aug 29, 2024 at 05:26:39PM +0300, Andy Shevchenko wrote:
> On Thu, Aug 29, 2024 at 5:23 PM Michael S. Tsirkin <mst@xxxxxxxxxx> wrote:
> >
> > On Thu, Aug 29, 2024 at 04:16:25PM +0200, Philipp Stanner wrote:
> > > In psnet_open_pf_bar() and snet_open_vf_bar() a string later passed to
> > > pcim_iomap_regions() is placed on the stack. Neither
> > > pcim_iomap_regions() nor the functions it calls copy that string.
> > >
> > > Should the string later ever be used, this, consequently, causes
> > > undefined behavior since the stack frame will by then have disappeared.
> > >
> > > Fix the bug by allocating the strings on the heap through
> > > devm_kasprintf().
> > >
> > > Cc: stable@xxxxxxxxxxxxxxx    # v6.3
> > > Fixes: 51a8f9d7f587 ("virtio: vdpa: new SolidNET DPU driver.")
> > > Reported-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
> > > Closes: https://lore.kernel.org/all/74e9109a-ac59-49e2-9b1d-d825c9c9f891@xxxxxxxxxx/
> > > Suggested-by: Andy Shevchenko <andy@xxxxxxxxxx>
> > > Signed-off-by: Philipp Stanner <pstanner@xxxxxxxxxx>
> >
> > Post this separately, so I can apply?
> 
> Don't you use `b4`? With it it as simple as
> 
>   b4 am -P 6 $MSG_ID_OF_THIS_SERIES
> 
> -- 
> With Best Regards,
> Andy Shevchenko

I can do all kind of things, but if it's posted as part of a patchset,
it is not clear to me this has been tested outside of the patchset.

-- 
MST