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] [thread-next>] [day] [month] [year] [list]
Message-ID: <20071017195036.GC3778@stusta.de>
Date:	Wed, 17 Oct 2007 21:50:36 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	Nish Aravamudan <nish.aravamudan@...il.com>
Cc:	"Darrick J. Wong" <djwong@...ibm.com>,
	"Mark M. Hoffman" <mhoffman@...htlink.com>,
	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org
Subject: Re: [2.6 patch] hwmon/ibmpex.c: fix NULL dereference

On Wed, Oct 17, 2007 at 12:39:59PM -0700, Nish Aravamudan wrote:
> On 10/17/07, Adrian Bunk <bunk@...nel.org> wrote:
> > Don't dereference "data" when we know for sure it's NULL.
> >
> > Spotted by the Coverity checker.
> >
> > Signed-off-by: Adrian Bunk <bunk@...nel.org>
> >
> > ---
> > 66bec2ef5c6d55fc30ef6ac5bb97fdfcfaf394f2
> > diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c
> > index c462824..e14ce3d 100644
> > --- a/drivers/hwmon/ibmpex.c
> > +++ b/drivers/hwmon/ibmpex.c
> > @@ -457,7 +457,7 @@ static void ibmpex_register_bmc(int iface, struct device *dev)
> >         data = kzalloc(sizeof(*data), GFP_KERNEL);
> >         if (!data) {
> >                 printk(KERN_ERR DRVNAME ": Insufficient memory for BMC "
> > -                      "interface %d.\n", data->interface);
> > +                      "interface.\n");
> 
> Hrm but what data->interface would be is specified by the iface
> parameter? Just spit that out instead?

This is only a symptom of the problem that kzalloc() failed, and when 
you are getting into such a situation here you have bigger problems - 
and these are not related to this driver.

Feel free to send a different patch, but IMHO "Insufficient memory" 
alone is enough information in this case.

> Thanks,
> Nish

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

-
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/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ