linux-kernel - Re: [PATCH v1] drm/bochs: fix an issue of ioremap() leak

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 22 Apr 2020 17:40:51 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Dejin Zheng <zhengdejin5@...il.com>
Cc:     kraxel@...hat.com, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        virtualization@...ts.linux-foundation.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] drm/bochs: fix an issue of ioremap() leak

On Wed, Apr 22, 2020 at 4:52 PM Dejin Zheng <zhengdejin5@...il.com> wrote:
>
> On Tue, Apr 21, 2020 at 08:24:24PM +0300, Andy Shevchenko wrote:
> > On Tue, Apr 21, 2020 at 7:45 PM Dejin Zheng <zhengdejin5@...il.com> wrote:
> > >
> > > It forgot to call bochs_hw_fini() to release related resources when
> > > bochs_pci_probe() fail. eg: io virtual address get by ioremap().
> >
> > Good start, although I think the best is to switch this driver to use
> > pcim_*() functions and drop tons of legacy code.
> >
> Andy, thanks for your encouragement, I think we might be able to fix this
> issue first, after that, drop tons of legacy code by pcim_*() functions.
> Do you think it is ok?

It's really up to maintainer. I'm not the one here.

> > > Fixes: 81da8c3b8d3df6 ("drm/bochs: add drm_driver.release callback.")
> > > CC: Andy Shevchenko <andy.shevchenko@...il.com>
> > > Signed-off-by: Dejin Zheng <zhengdejin5@...il.com>
> > > ---
> > >  drivers/gpu/drm/bochs/bochs_drv.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
> > > index addb0568c1af..210a60135c8a 100644
> > > --- a/drivers/gpu/drm/bochs/bochs_drv.c
> > > +++ b/drivers/gpu/drm/bochs/bochs_drv.c
> > > @@ -138,6 +138,7 @@ static int bochs_pci_probe(struct pci_dev *pdev,
> > >         return ret;
> > >
> > >  err_unload:
> > > +       bochs_hw_fini(dev);
> > >         bochs_unload(dev);
> > >  err_free_dev:
> > >         drm_dev_put(dev);
> > > --
> > > 2.25.0
> > >
> >
> >
> > --
> > With Best Regards,
> > Andy Shevchenko



-- 
With Best Regards,
Andy Shevchenko