linux-kernel - Re: [PATCH] ACPI / EC: Free saved

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Mon, 07 Jul 2014 23:00:29 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Lan Tianyu <lantianyu1986@...il.com>
Cc:	Colin King <colin.king@...onical.com>, Len Brown <lenb@...nel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r kernel org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI / EC: Free saved_ec on error exit path

On Friday, July 04, 2014 10:15:52 AM Lan Tianyu wrote:
> 2014-07-03 7:35 GMT+08:00 Colin King <colin.king@...onical.com>:
> > From: Colin Ian King <colin.king@...onical.com>
> >
> > Smatch detected two memory leaks on saved_ec:
> >
> > drivers/acpi/ec.c:1070 acpi_ec_ecdt_probe() warn: possible
> >   memory leak of 'saved_ec'
> > drivers/acpi/ec.c:1109 acpi_ec_ecdt_probe() warn: possible
> >   memory leak of 'saved_ec'
> >
> > Free saved_ec on these two error exit paths to stop the memory
> > leak.  Note that saved_ec maybe null, but kfree on null is allowed.
> >
> 
> Acked-by: Lan Tianyu <tianyu.lan@...el.com>

Queued up for 3.16, thanks!

> > Signed-off-by: Colin Ian King <colin.king@...onical.com>
> > ---
> >  drivers/acpi/ec.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
> > index ad11ba4..9800f50 100644
> > --- a/drivers/acpi/ec.c
> > +++ b/drivers/acpi/ec.c
> > @@ -1066,8 +1066,10 @@ int __init acpi_ec_ecdt_probe(void)
> >         /* fall through */
> >         }
> >
> > -       if (EC_FLAGS_SKIP_DSDT_SCAN)
> > +       if (EC_FLAGS_SKIP_DSDT_SCAN) {
> > +               kfree(saved_ec);
> >                 return -ENODEV;
> > +       }
> >
> >         /* This workaround is needed only on some broken machines,
> >          * which require early EC, but fail to provide ECDT */
> > @@ -1105,6 +1107,7 @@ install:
> >         }
> >  error:
> >         kfree(boot_ec);
> > +       kfree(saved_ec);
> >         boot_ec = NULL;
> >         return -ENODEV;
> >  }
> > --
> > 2.0.1
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 
> 
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/