linux-kernel - Re: [patch] pm_qos_params: cleanup: terminate a string

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Date:	Thu, 9 Sep 2010 23:21:24 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	markgross@...gnar.org
Cc:	Dan Carpenter <error27@...il.com>,
	James Bottomley <James.Bottomley@...e.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] pm_qos_params: cleanup: terminate a string

On Thursday, September 09, 2010, mark gross wrote:
> On Thu, Sep 09, 2010 at 12:13:59AM +0200, Rafael J. Wysocki wrote:
> > On Tuesday, September 07, 2010, mark gross wrote:
> > > On Mon, Sep 06, 2010 at 11:22:27PM -0700, mark gross wrote:
> > > > On Fri, Sep 03, 2010 at 02:41:06PM +0200, Dan Carpenter wrote:
> > ...
> > > 
> > > updated patch 
> > > 
> > > Signed-off-by: mark gross <markgross@...gnar.org>
> > > 
> > > --mgross 
> > > 
> > > Subject: [PATCH] correct some pr_debug misuse and add a stronger parrameter check to
> > >  pm_qos_write for the ascii hex value case.  Thanks to Dan Carpenter for
> > >  pointing out the problem!
> > > 
> > > ---
> > >  kernel/pm_qos_params.c |    6 ++++--
> > >  1 files changed, 4 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
> > > index f42d3f7..aae58d2 100644
> > > --- a/kernel/pm_qos_params.c
> > > +++ b/kernel/pm_qos_params.c
> > > @@ -155,7 +155,7 @@ static void update_target(int pm_qos_class)
> > >  		call_notifier = 1;
> > >  		atomic_set(&pm_qos_array[pm_qos_class]->target_value,
> > >  				extreme_value);
> > > -		pr_debug(KERN_ERR "new target for qos %d is %d\n", pm_qos_class,
> > > +		pr_debug("new target for qos %d is %d\n", pm_qos_class,
> > >  			atomic_read(&pm_qos_array[pm_qos_class]->target_value));
> > >  	}
> > >  	spin_unlock_irqrestore(&pm_qos_lock, flags);
> > 
> > The above doesn't apply to the Linus' tree any more.  Care to fix?
> > 
> > Rafael
> 
> no problem.  (I screwed up on my fetch and forgot to merge the linus
> remote....) This bit doesn't apply post 2.6.35.
> --mgross

Thanks, applied to suspend-2.6/linux-next .

Rafael


> Signed-off-by: mark gross <markgross@...gnar.org)
> 
> 
> From 64753f68e2baaef21783192566469abc54aca90d Mon Sep 17 00:00:00 2001
> From: mgross <mgross@...oss-laptop.(none)>
> Date: Wed, 8 Sep 2010 19:52:39 -0700
> Subject: [PATCH] make it harder to misuse the pm_qos user mode api.
> 
> ---
>  kernel/pm_qos_params.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
> index b7e4c36..645e541 100644
> --- a/kernel/pm_qos_params.c
> +++ b/kernel/pm_qos_params.c
> @@ -389,10 +389,12 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
>  	} else if (count == 11) { /* len('0x12345678/0') */
>  		if (copy_from_user(ascii_value, buf, 11))
>  			return -EFAULT;
> +		if (strlen(ascii_value) != 10)
> +			return -EINVAL;
>  		x = sscanf(ascii_value, "%x", &value);
>  		if (x != 1)
>  			return -EINVAL;
> -		pr_debug(KERN_ERR "%s, %d, 0x%x\n", ascii_value, x, value);
> +		pr_debug("%s, %d, 0x%x\n", ascii_value, x, value);
>  	} else
>  		return -EINVAL;
>  
> 

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