linux-kernel - Re: [PATCH] debugfs: Fix debugfs_read_file

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Date:   Fri, 4 Jun 2021 10:41:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Dietmar Eggemann <dietmar.eggemann@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Valentin Schneider <valentin.schneider@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] debugfs: Fix debugfs_read_file_str()

On Fri, Jun 04, 2021 at 10:39:43AM +0200, Peter Zijlstra wrote:
> On Thu, May 27, 2021 at 11:11:05AM +0200, Dietmar Eggemann wrote:
> > Read the entire size of the buffer, including the trailing new line
> > character.
> > Discovered while reading the sched domain names of CPU0:
> > 
> > before:
> > 
> > cat /sys/kernel/debug/sched/domains/cpu0/domain*/name
> > SMTMCDIE
> > 
> > after:
> > 
> > cat /sys/kernel/debug/sched/domains/cpu0/domain*/name
> > SMT
> > MC
> > DIE
> > 
> > Fixes: 9af0440ec86eb ("debugfs: Implement debugfs_create_str()")
> > Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
> 
> Urgh.. so much for last minute changes :/
> 
> Greg, AFAICT that commit has since landed in Linus, will you take care
> of this?
> 
> Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Yes, I'll pick it up now, thanks.

greg k-h