linux-kernel - Re: [PATCH 2/3] trusted-keys: check hex2bin result

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Date:	Tue, 20 Sep 2011 10:12:40 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	linux-security-module@...r.kernel.org,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	James Morris <jmorris@...ei.org>,
	David Safford <safford@...son.ibm.com>
Subject: Re: [PATCH 2/3] trusted-keys: check hex2bin result

On Tue, 2011-09-20 at 16:57 +0300, Andy Shevchenko wrote:
> On Tue, Sep 20, 2011 at 4:15 PM, Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:
> > From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> >
> > For each hex2bin call in trusted keys, check that the ascii hex string is
> > valid.  On failure, return -EINVAL.
> >
> > Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> > Signed-off-by: Mimi Zohar <zohar@...ux.vnet.ibm.com>
> > ---
> >  security/keys/trusted.c |   15 +++++++++++----
> >  1 files changed, 11 insertions(+), 4 deletions(-)
> >
> > diff --git a/security/keys/trusted.c b/security/keys/trusted.c
> > index 0c33e2e..9b847e1 100644
> > --- a/security/keys/trusted.c
> > +++ b/security/keys/trusted.c
> > @@ -779,7 +779,9 @@ static int getoptions(char *c, struct trusted_key_payload *pay,
> >                        opt->pcrinfo_len = strlen(args[0].from) / 2;
> >                        if (opt->pcrinfo_len > MAX_PCRINFO_SIZE)
> >                                return -EINVAL;
> > -                       hex2bin(opt->pcrinfo, args[0].from, opt->pcrinfo_len);
> > +                       if (!hex2bin(opt->pcrinfo, args[0].from,
> > +                                    opt->pcrinfo_len))
> > +                               return -EINVAL;
> if (hex2bin(...) < 0)
> 
> Everywhere in Patch 2 and 3.

thanks,

Mimi

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