linux-kernel - Re: [PATCH v2] ima: silence measurement list hexdump during kexec

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Message-ID: <c3a1c7afed5962da2bf89d347fa5eea5fea40daf.camel@linux.ibm.com>
Date:   Fri, 24 Dec 2021 08:28:01 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Bruno Meneguele <bmeneg@...hat.com>
Cc:     linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ima: silence measurement list hexdump during kexec

Hi Bruno,

On Fri, 2021-12-24 at 10:14 -0300, Bruno Meneguele wrote:
> The measurement list is dumped during a soft reset (kexec) through the call
> to print_hex_dump(KERN_DEBUG, ...), printing to the system log ignoring both
> DEBUG build flag and CONFIG_DYNAMIC_DEBUG option.

Before upstreaming this patch, the reason for the config options "being
ignored", if that is really what is happening, needs to be understood
and documented here in the patch description.

thanks,

Mimi

> 
> To honor the above conditions the macro print_hex_dump_debug() should be
> used instead, thus depending on the enabled option/flag the output is given
> by a different function call or even silenced.
> 
> Signed-off-by: Bruno Meneguele <bmeneg@...hat.com>