From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Chuhong Yuan <hslester96@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Haojian Zhuang <haojian.zhuang@gmail.com>,
linux-spi <linux-spi@vger.kernel.org>,
Mark Brown <broonie@kernel.org>, Daniel Mack <daniel@zonque.org>,
Robert Jarzmik <robert.jarzmik@free.fr>,
linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] spi: pxa2xx: Add missed security checks
Date: Fri, 18 Oct 2019 14:14:41 +0300 [thread overview]
Message-ID: <CAHp75VeLyTi=gqfNr-=Tg36yQs_fYG__iQAxAEKdks0mqsTbug@mail.gmail.com> (raw)
In-Reply-To: <CANhBUQ2yxGbjk_DgXbip=TPT=evzA5naoJSY9t1_Ep47e9oupw@mail.gmail.com>
On Fri, Oct 18, 2019 at 1:39 PM Chuhong Yuan <hslester96@gmail.com> wrote:
>
> On Fri, Oct 18, 2019 at 5:35 PM Andy Shevchenko
> <andy.shevchenko@gmail.com> wrote:
> >
> > On Fri, Oct 18, 2019 at 8:59 AM Chuhong Yuan <hslester96@gmail.com> wrote:
> > >
> > > pxa2xx_spi_init_pdata misses checks for devm_clk_get and
> > > platform_get_irq.
> > > Add checks for them to fix the bugs.
> > >
> > > Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
> > > ---
> > > drivers/spi/spi-pxa2xx.c | 6 ++++++
> > > 1 file changed, 6 insertions(+)
> > >
> > > diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
> > > index bb6a14d1ab0f..2e73d75a6ac5 100644
> > > --- a/drivers/spi/spi-pxa2xx.c
> > > +++ b/drivers/spi/spi-pxa2xx.c
> > > @@ -1565,7 +1565,13 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
> > > #endif
> > >
> > > ssp->clk = devm_clk_get(&pdev->dev, NULL);
> > > + if (IS_ERR(ssp->clk))
> > > + return NULL;
> > > +
> > > ssp->irq = platform_get_irq(pdev, 0);
> > > + if (ssp->irq < 0)
> > > + return NULL;
> >
> > I'm not sure they are mandatory for all platforms.
> > To be on the safe side, you simple need to add _optional() to the both
> > call along with above change.
> >
>
> As I know, this is the only one in spi which does not have a check for
> devm_clk_get.
For some it still may be optional. That's why better to check it and
mention in the commit message.
> Even if add _optional(), they still may return errors and need security checks.
Of course, see "along with" in my previous comment.
--
With Best Regards,
Andy Shevchenko
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-10-18 11:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-17 2:50 [PATCH] spi: pxa2xx: Add missed security checks Chuhong Yuan
2019-10-18 9:34 ` Andy Shevchenko
2019-10-18 10:39 ` Chuhong Yuan
2019-10-18 11:14 ` Andy Shevchenko [this message]
2019-10-18 11:37 ` Chuhong Yuan
2019-10-18 14:04 ` Andy Shevchenko
2019-10-28 1:38 ` Chuhong Yuan
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