linux-kernel - Re: [PATCH] ACPI: scan: Fix a memory leak in an error handling path

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Date:   Mon, 10 May 2021 19:04:16 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] ACPI: scan: Fix a memory leak in an error handling path

On Mon, May 10, 2021 at 3:17 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Sat, May 08, 2021 at 09:23:09AM +0200, Christophe JAILLET wrote:
> > If 'acpi_device_set_name()' fails, we must free
> > 'acpi_device_bus_id->bus_id' or there is a (potential) memory leak.
>
> Good catch!
> I guess I have lost it somewhere in the middle of developing the mentioned fix.
>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>
> Thanks!
>
> > Fixes: eb50aaf960e3 ("ACPI: scan: Use unique number for instance_no")
> > Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> > ---
> >  drivers/acpi/scan.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> > index a22778e880c2..651a431e2bbf 100644
> > --- a/drivers/acpi/scan.c
> > +++ b/drivers/acpi/scan.c
> > @@ -700,6 +700,7 @@ int acpi_device_add(struct acpi_device *device,
> >
> >               result = acpi_device_set_name(device, acpi_device_bus_id);
> >               if (result) {
> > +                     kfree_const(acpi_device_bus_id->bus_id);
> >                       kfree(acpi_device_bus_id);
> >                       goto err_unlock;
> >               }
> > --

Applied as 5.13-rc material, thanks!