linux-kernel - Re: [PATCH 0/8] Rework KERN

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Date:	Wed, 6 Jun 2012 03:10:54 +0200
From:	Kay Sievers <kay@...y.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Joe Perches <joe@...ches.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-arm-kernel@...ts.infradead.org, linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	alsa-devel@...a-project.org
Subject: Re: [PATCH 0/8] Rework KERN_<LEVEL>

On Wed, Jun 6, 2012 at 2:46 AM, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Tue, 05 Jun 2012 17:40:05 -0700 Joe Perches <joe@...ches.com> wrote:
>
>> On Tue, 2012-06-05 at 17:37 -0700, Andrew Morton wrote:
>> > On Tue, 05 Jun 2012 17:07:27 -0700 Joe Perches <joe@...ches.com> wrote:
>> >
>> > > On Tue, 2012-06-05 at 16:58 -0700, Andrew Morton wrote:
>> > > >  echo "\0014Hello Joe" > /dev/kmsg
>> > >
>> > > # echo -e "\x014Hello Me" > /dev/kmsg
>> > > gives:
>> > > 12,778,4057982669;Hello Me
>> >
>> > That's changed behavior.
>>
>> Which is an improvement too.
>
> No it isn't.  It exposes internal kernel implementation details in
> random weird inexplicable ways.  It doesn't seem at all important
> though.
>
>> I very much doubt a single app will change
>> because of this.
>
> I doubt it as well.

Yeah, the value of injecting such binary data is kind of questionable. :)

Joe, maybe you can change printk_emit() to skip the prefix
detection/stripping if a prefix is already passed to the function?

Kay
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