linux-kernel - Re: [PATCH] security/integrity: Include __func_

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Date:   Mon, 03 Feb 2020 11:02:57 -0800
From:   Joe Perches <joe@...ches.com>
To:     Shuah Khan <skhan@...uxfoundation.org>,
        Mimi Zohar <zohar@...ux.ibm.com>, jmorris@...ei.org,
        serge@...lyn.com, mpe@...erman.id.au, erichte@...ux.ibm.com,
        nayna@...ux.ibm.com, yuehaibing@...wei.com
Cc:     linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] security/integrity: Include __func__ in messages for
 easier debug

On Mon, 2020-02-03 at 11:55 -0700, Shuah Khan wrote:
> On 2/3/20 6:21 AM, Mimi Zohar wrote:
> > On Wed, 2020-01-29 at 19:08 -0800, Joe Perches wrote:
> > > On Wed, 2020-01-29 at 19:01 -0700, Shuah Khan wrote:
> > > > Change messages to messages to make it easier to debug. The following
> > > > error message isn't informative enough to figure out what failed.
> > > > Change messages to include function information.
> > > > 
> > > > Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
> > > > ---
> > > >   .../integrity/platform_certs/load_powerpc.c     | 14 ++++++++------
> > > >   security/integrity/platform_certs/load_uefi.c   | 17 ++++++++++-------
> > > >   2 files changed, 18 insertions(+), 13 deletions(-)
> > > > 
> > > > diff --git a/security/integrity/platform_certs/load_powerpc.c b/security/integrity/platform_certs/load_powerpc.c
> > > 
> > > perhaps instead add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> > > so all the pr_<level> logging is more specific.
> > > 
> > > This would prefix all pr_<level> output with "integrity: "
> 
> Joe! Sorry for the delay in getting back to you.
> 
> > Agreed.  Joe, could you post a patch with a proper patch description
> > for this?
> > 
> 
> I have been looking into this a bit more and there is an opportunity
> here to add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt to integrity.h
> and get rid of duplicate defines.

That might work but:

$ git grep --name-only 'integrity\.h' security | xargs grep pr_fmt
security/integrity/digsig.c:#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
security/integrity/digsig_asymmetric.c:#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
security/integrity/evm/evm_main.c:#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
security/security.c:#define pr_fmt(fmt) "LSM: " fmt

Here security.c already uses "LSM: "

Does anyone care about the LSM: prefix?