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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
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