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

[Andy Shevchenko]

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