linux-kernel - Re: [PATCH] tpm: fix type issues in tpm

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Date:   Wed, 1 Feb 2017 20:30:58 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     tpmdd-devel@...ts.sourceforge.net
Cc:     linux-security-module@...r.kernel.org,
        Peter Huewe <peterhuewe@....de>,
        Marcel Selhorst <tpmdd@...horst.net>,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tpm: fix type issues in tpm_getcap()

On Wed, Feb 01, 2017 at 08:18:45PM +0200, Jarkko Sakkinen wrote:
> On Wed, Feb 01, 2017 at 07:53:47PM +0200, Jarkko Sakkinen wrote:
> > There are two type issues associated with tpm_getcap().
> > 
> > You must not do arithmetic with __be32 or __le32 types because sometimes
> > it results incorrect results. Calculations must be done only with data
> > that is in CPU byte order. This commit migrates tpm_getcap() to struct
> > tpm_buf in order to sort out these issues.
> > 
> > The second issue is with struct cap_t as the size of the type bool is
> > assumed to be one byte. This commit sorts out the issue by changing the
> > type to u8.
> > 
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> 
> This is the only mandatory fix for the next pull request and 4.11.

I mean from the reported sparse errors.

/Jarkko