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Re: [PATCH 2/2] keys, trusted: seal with a policy

From Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH 2/2] keys, trusted: seal with a policy
Date 2015-12-07 10:20 +0100
Message-ID <qD07F-2A3-41@gated-at.bofh.it> (permalink)
References <qvRiO-7og-9@gated-at.bofh.it> <qvRiO-7og-7@gated-at.bofh.it> <qvYNk-3Of-15@gated-at.bofh.it> <qw52p-86c-5@gated-at.bofh.it> <qwJMe-13l-11@gated-at.bofh.it>
Organization Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo

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On Fri, Nov 20, 2015 at 01:34:35PM +1100, James Morris wrote:
> On Wed, 18 Nov 2015, Jarkko Sakkinen wrote:
> 
> > On Wed, Nov 18, 2015 at 11:21:01AM +1100, James Morris wrote:
> > > On Tue, 17 Nov 2015, Jarkko Sakkinen wrote:
> > > 
> > > >  			}
> > > >  			break;
> > > > +		case Opt_policydigest:
> > > > +			if (!tpm2 ||
> > > > +			    strlen(args[0].from) != (2 * opt->digest_len))
> > > > +				return -EINVAL;
> > > > +			kfree(opt->policydigest);
> > > > +			opt->policydigest = kzalloc(opt->digest_len,
> > > > +						    GFP_KERNEL);
> > > 
> > > Is it correct to kfree opt->policydigest here before allocating it?
> > 
> > I think so. The same option might be encountered multiple times.
> 
> This would surely signify an error?

I'm following the semantics of other options. That's why I implemented
it that way for example:

keyctl add trusted kmk "new 32 keyhandle=0x80000000 keyhandle=0x80000000"

is perfectly OK. I just thought that it'd be more odd if this option
behaved in a different way...

> -- 
> James Morris
> <jmorris@namei.org>

/Jarkko
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Re: [PATCH 2/2] keys, trusted: seal with a policy Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2015-12-07 10:20 +0100
  Re: [PATCH 2/2] keys, trusted: seal with a policy James Morris <jmorris@namei.org> - 2015-12-07 23:40 +0100
    Re: [PATCH 2/2] keys, trusted: seal with a policy Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2015-12-08 12:10 +0100
      Re: [PATCH 2/2] keys, trusted: seal with a policy Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2015-12-08 21:30 +0100
        Re: [PATCH 2/2] keys, trusted: seal with a policy Mimi Zohar <zohar@linux.vnet.ibm.com> - 2015-12-09 01:00 +0100
          Re: [PATCH 2/2] keys, trusted: seal with a policy Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> - 2015-12-09 15:30 +0100
            Re: [PATCH 2/2] keys, trusted: seal with a policy Mimi Zohar <zohar@linux.vnet.ibm.com> - 2015-12-09 17:20 +0100

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