linux-kernel - Re: [PATCH 18/20] staging/lustre/libcfs: get rid of debugfs/lnet/debug

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Message-ID: <20150714024313.GA24722@kroah.com>
Date:	Mon, 13 Jul 2015 19:43:13 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	green@...uxhacker.ru, devel@...verdev.osuosl.org,
	Andreas Dilger <andreas.dilger@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 18/20] staging/lustre/libcfs: get rid of
 debugfs/lnet/debug_mb

On Wed, Jul 08, 2015 at 11:45:59AM +0300, Dan Carpenter wrote:
> On Mon, Jul 06, 2015 at 12:48:56PM -0400, green@...uxhacker.ru wrote:
> > +static int libcfs_param_debug_mb_set(const char *val,
> > +				     const struct kernel_param *kp)
> > +{
> > +	int rc;
> > +	unsigned num;
> > +
> > +	rc = kstrtouint(val, 0, &num);
> > +	if (rc == -EINVAL)
> > +		return -EINVAL;
> 
> Presumably, this is root only so using num uninitialized is not an
> information leak.

But it's not good, this should be a check for rc < 0 to make sure.

Oleg, can you send a follow-on patch to fix this up?

thanks,

greg k-h
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