All of lore.kernel.org
 help / color / mirror / Atom feed
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Aditya Pakki <pakki001@umn.edu>
Cc: Boris Brezillon <bbrezillon@kernel.org>,
	Richard Weinberger <richard@nod.at>,
	kjlu@umn.edu, linux-kernel@vger.kernel.org,
	Stefan Agner <stefan@agner.ch>,
	Marek Vasut <marek.vasut@gmail.com>,
	linux-mtd@lists.infradead.org,
	Brian Norris <computersforpeace@gmail.com>,
	David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH] mtd: rawnand: vf610: Fix to check for NULL pointer dereference
Date: Mon, 1 Apr 2019 17:26:51 +0200	[thread overview]
Message-ID: <20190401172651.158c05fe@xps13> (raw)
In-Reply-To: <20190318232434.9246-1-pakki001@umn.edu>

Hi Aditya,

Aditya Pakki <pakki001@umn.edu> wrote on Mon, 18 Mar 2019 18:24:34
-0500:

> of_match_device can return NULL if there is no matching device is found.
> The patch avoids a potential NULL pointer dereference by checking for the
> return value and passing the error upstream.
> 
> Signed-off-by: Aditya Pakki <pakki001@umn.edu>
> ---
>  drivers/mtd/nand/raw/vf610_nfc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
> index a662ca1970e5..946abbb275c3 100644
> --- a/drivers/mtd/nand/raw/vf610_nfc.c
> +++ b/drivers/mtd/nand/raw/vf610_nfc.c
> @@ -850,6 +850,8 @@ static int vf610_nfc_probe(struct platform_device *pdev)
>  	}
>  
>  	of_id = of_match_device(vf610_nfc_dt_ids, &pdev->dev);
> +	if (!of_id)
> +		return -ENODEV;
>  	nfc->variant = (enum vf610_nfc_variant)of_id->data;
>  
>  	for_each_available_child_of_node(nfc->dev->of_node, child) {


Applied to git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git
on nand/next with the title changed to

        mtd: rawnand: vf610: Avoid a potential NULL pointer dereference

and a space after the return statement.

Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Aditya Pakki <pakki001@umn.edu>
Cc: kjlu@umn.edu, Stefan Agner <stefan@agner.ch>,
	Boris Brezillon <bbrezillon@kernel.org>,
	Richard Weinberger <richard@nod.at>,
	David Woodhouse <dwmw2@infradead.org>,
	Brian Norris <computersforpeace@gmail.com>,
	Marek Vasut <marek.vasut@gmail.com>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mtd: rawnand: vf610: Fix to check for NULL pointer dereference
Date: Mon, 1 Apr 2019 17:26:51 +0200	[thread overview]
Message-ID: <20190401172651.158c05fe@xps13> (raw)
In-Reply-To: <20190318232434.9246-1-pakki001@umn.edu>

Hi Aditya,

Aditya Pakki <pakki001@umn.edu> wrote on Mon, 18 Mar 2019 18:24:34
-0500:

> of_match_device can return NULL if there is no matching device is found.
> The patch avoids a potential NULL pointer dereference by checking for the
> return value and passing the error upstream.
> 
> Signed-off-by: Aditya Pakki <pakki001@umn.edu>
> ---
>  drivers/mtd/nand/raw/vf610_nfc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
> index a662ca1970e5..946abbb275c3 100644
> --- a/drivers/mtd/nand/raw/vf610_nfc.c
> +++ b/drivers/mtd/nand/raw/vf610_nfc.c
> @@ -850,6 +850,8 @@ static int vf610_nfc_probe(struct platform_device *pdev)
>  	}
>  
>  	of_id = of_match_device(vf610_nfc_dt_ids, &pdev->dev);
> +	if (!of_id)
> +		return -ENODEV;
>  	nfc->variant = (enum vf610_nfc_variant)of_id->data;
>  
>  	for_each_available_child_of_node(nfc->dev->of_node, child) {


Applied to git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git
on nand/next with the title changed to

        mtd: rawnand: vf610: Avoid a potential NULL pointer dereference

and a space after the return statement.

Thanks,
Miquèl

  reply	other threads:[~2019-04-01 15:27 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-18 23:24 [PATCH] mtd: rawnand: vf610: Fix to check for NULL pointer dereference Aditya Pakki
2019-03-18 23:24 ` Aditya Pakki
2019-04-01 15:26 ` Miquel Raynal [this message]
2019-04-01 15:26   ` Miquel Raynal
2019-04-01 15:30   ` Boris Brezillon
2019-04-01 15:30     ` Boris Brezillon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190401172651.158c05fe@xps13 \
    --to=miquel.raynal@bootlin.com \
    --cc=bbrezillon@kernel.org \
    --cc=computersforpeace@gmail.com \
    --cc=dwmw2@infradead.org \
    --cc=kjlu@umn.edu \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mtd@lists.infradead.org \
    --cc=marek.vasut@gmail.com \
    --cc=pakki001@umn.edu \
    --cc=richard@nod.at \
    --cc=stefan@agner.ch \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.