From: Marco Felsch <m.felsch@pengutronix.de>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 5/7] mtd: nand-mxs: fix out-of-bounds write on 64-bit SoCs
Date: Mon, 28 Sep 2020 18:08:35 +0200 [thread overview]
Message-ID: <20200928160835.GB20189@pengutronix.de> (raw)
In-Reply-To: <d0fb2978-7053-40c2-92e1-5648c2841da8@pengutronix.de>
On 20-09-28 18:03, Ahmad Fatoum wrote:
>
>
> On 9/28/20 6:01 PM, Marco Felsch wrote:
> > On 20-09-28 17:42, Ahmad Fatoum wrote:
> >> Probing the nand_mxs device driver on 64 bit systems invokes
> >> undefined behavior, because of an errant cast. Fix this.
> >>
> >> No change of behavior for 32-bit SoCs intended.
> >>
> >> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> >> ---
> >> drivers/mtd/nand/nand_mxs.c | 4 +---
> >> 1 file changed, 1 insertion(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/mtd/nand/nand_mxs.c b/drivers/mtd/nand/nand_mxs.c
> >> index 36b6e7ac224e..e2b6e2162076 100644
> >> --- a/drivers/mtd/nand/nand_mxs.c
> >> +++ b/drivers/mtd/nand/nand_mxs.c
> >> @@ -2145,9 +2145,7 @@ static int mxs_nand_probe(struct device_d *dev)
> >> if (mxs_nand_mtd)
> >> return -EBUSY;
> >>
> >> - err = dev_get_drvdata(dev, (const void **)&type);
> >> - if (err)
> >> - type = GPMI_MXS;
> >> + type = (enum gpmi_type)device_get_match_data(dev);
> >
> > Should we add:
> >
> > if (!type)
> > type = GPMI_MXS;
> >
> > here?
>
> (enum gpmi_type)0 is already GPMI_MXS. So that's a no-op.
I see, just wanted to be sure :)
Regards,
Marco
>
> >
> >> nand_info = kzalloc(sizeof(struct mxs_nand_info), GFP_KERNEL);
> >> if (!nand_info) {
> >> --
> >> 2.28.0
> >>
> >>
> >> _______________________________________________
> >> barebox mailing list
> >> barebox@lists.infradead.org
> >> http://lists.infradead.org/mailman/listinfo/barebox
> >>
> >
>
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next prev parent reply other threads:[~2020-09-28 16:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 15:42 [PATCH 1/7] driver: introduce less error-prone dev_get_drvdata alternative Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 2/7] led: pca955x: fix probing from device tree Ahmad Fatoum
2020-09-29 7:19 ` Sascha Hauer
2020-09-30 7:28 ` Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 3/7] dma: apbh: fix out-of-bounds write on 64-bit SoCs Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 4/7] aiodev: lm75: " Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 5/7] mtd: nand-mxs: " Ahmad Fatoum
2020-09-28 16:01 ` Marco Felsch
2020-09-28 16:03 ` Ahmad Fatoum
2020-09-28 16:08 ` Marco Felsch [this message]
2020-09-28 15:42 ` [PATCH 6/7] video: imx-hdmi: fix dev_get_drvdata misuse Ahmad Fatoum
2020-09-28 15:42 ` [PATCH 7/7] driver: migrate some from dev_get_drvdata to device_get_match_data Ahmad Fatoum
2020-09-28 15:46 ` [PATCH 1/7] driver: introduce less error-prone dev_get_drvdata alternative Ahmad Fatoum
2020-09-29 6:45 ` Sascha Hauer
2020-09-29 7:32 ` Sascha Hauer
2020-09-29 9:42 ` Ahmad Fatoum
2020-09-30 7:48 ` Sascha Hauer
2020-09-30 13:13 ` Ahmad Fatoum
2020-10-05 8:31 ` Ahmad Fatoum
2020-10-07 8:43 ` Sascha Hauer
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