linux-kernel - Re: [PATCH][next] powercap/drivers/dtpm: Fix size of object being allocated

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Date:   Thu, 7 Jan 2021 18:20:41 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Colin King <colin.king@...onical.com>
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Lukasz Luba <lukasz.luba@....com>,
        Linux PM <linux-pm@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][next] powercap/drivers/dtpm: Fix size of object being allocated

On Mon, Jan 4, 2021 at 3:24 PM Daniel Lezcano <daniel.lezcano@...aro.org> wrote:
>
> On 04/01/2021 13:10, Colin King wrote:
> > From: Colin Ian King <colin.king@...onical.com>
> >
> > The kzalloc allocation for dtpm_cpu is currently allocating the size
> > of the pointer and not the size of the structure. Fix this by using
> > the correct sizeof argument.
> >
> > Addresses-Coverity: ("Wrong sizeof argument")
> > Fixes: 0e8f68d7f048 ("powercap/drivers/dtpm: Add CPU energy model based support")
> > Signed-off-by: Colin Ian King <colin.king@...onical.com>
>
> Good catch, thanks for fixing this
>
> Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

Applied as 5.12 material, thanks!

> > ---
> >  drivers/powercap/dtpm_cpu.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c
> > index 6933c783c6b4..51c366938acd 100644
> > --- a/drivers/powercap/dtpm_cpu.c
> > +++ b/drivers/powercap/dtpm_cpu.c
> > @@ -200,7 +200,7 @@ static int cpuhp_dtpm_cpu_online(unsigned int cpu)
> >       if (!dtpm)
> >               return -EINVAL;
> >
> > -     dtpm_cpu = kzalloc(sizeof(dtpm_cpu), GFP_KERNEL);
> > +     dtpm_cpu = kzalloc(sizeof(*dtpm_cpu), GFP_KERNEL);
> >       if (!dtpm_cpu)
> >               goto out_kfree_dtpm;
> >
> >
>
>
> --
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