Re: [lm-sensors] [PATCH] hwmon: (coretemp) Avoid leaving around

[Guenter Roeck <guenter.roeck@ericsson.com>]

On Wed, Sep 28, 2011 at 08:27:52AM -0400, Jean Delvare wrote:
> Hi Guenter,
> 
> Once again sorry for the late review. At this rate I'm going to add
> this to my signature :(
> 
> On Sat, 24 Sep 2011 15:33:09 -0700, Guenter Roeck wrote:
> > Storing the struct temp_data pointer allocated from create_core_data()
> > when returning an error has the potential of leaving around a pointer
> > to freed memory. Reset it to NULL for error returns.
> > 
> > Reported-by: Jan Beulich <jbeulich@suse.com>
> > Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
> > ---
> > I want to send the pending patches to Linus, and include a fix for the problem
> > reported by Jan. So here it is.
> > 
> >  drivers/hwmon/coretemp.c |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
> > index 44b2391..5100b01 100644
> > --- a/drivers/hwmon/coretemp.c
> > +++ b/drivers/hwmon/coretemp.c
> > @@ -508,6 +508,7 @@ static int create_core_data(struct platform_device *pdev,
> >  
> >  	return 0;
> >  exit_free:
> > +	pdata->core_data[attr_no] = NULL;
> >  	kfree(tdata);
> >  	return err;
> >  }
> 
> Yes, obviously correct and the right thing to do.
> 
> Acked-by: Jean Delvare <khali@linux-fr.org>
> 
Better late than never ... thanks, applied.

Guenter

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