linux-kernel - Re: [PATCH][next] iio: st_sensors: handle memory allocation failure to fix null pointer dereference

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Date:   Sun, 2 Feb 2020 16:25:02 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Colin King <colin.king@...onical.com>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio <linux-iio@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][next] iio: st_sensors: handle memory allocation failure
 to fix null pointer dereference

On Thu, 23 Jan 2020 16:28:28 +0100
Linus Walleij <linus.walleij@...aro.org> wrote:

> On Tue, Jan 21, 2020 at 5:18 PM Colin King <colin.king@...onical.com> wrote:
> 
> > From: Colin Ian King <colin.king@...onical.com>
> >
> > A null pointer deference on pdata can occur if the allocation of
> > pdata fails.  Fix this by adding a null pointer check and handle
> > the -ENOMEM failure in the caller.
> >
> > Addresses-Coverity: ("Dereference null return value")  
> 
> That's a weirdo tag, but I suppose you have aligned with the maintainers
> about this.
> 
> > Fixes: 3ce85cc4fbb7 ("iio: st_sensors: get platform data from device tree")
> > Signed-off-by: Colin Ian King <colin.king@...onical.com>  
> 
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.

Thanks,

Jonathan

> 
> Yours,
> Linus Walleij