linux-kernel - Re: [PATCH RESEND] kthread, tracing: Don't expose half-written comm when creating kthreads

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Message-ID: <cbdab69a-28a4-08fd-a6c9-6db30958b12b@sony.com>
Date:   Tue, 24 Jul 2018 17:02:54 +0200
From:   Snild Dolkow <snild@...y.com>
To:     Steven Rostedt <rostedt@...dmis.org>
CC:     <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>,
        Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Enderborg <peter.enderborg@...y.com>,
        Yoshitaka Seto <yoshitaka.seto@...y.com>,
        Oleksiy Avramchenko <oleksiy.avramchenko@...y.com>,
        KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
        John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH RESEND] kthread, tracing: Don't expose half-written comm
 when creating kthreads

On 07/24/2018 04:48 PM, Steven Rostedt wrote:
> On Tue, 24 Jul 2018 10:17:37 +0200
> Snild Dolkow <snild@...y.com> wrote:
> 
>> 	creator                         other
>> 	vsnprintf:
>> 	  fill (not terminated)
>> 	  count the rest                read/use comm
> 
> I think it would be better to state what was reading the comm. Like
> 
> 					trace_sched_waking(p)
> 					  memcpy(comm, p->comm, TASK_COMM_LEN)
> 
> But the rest looks fine.
> 
> -- Steve

Works for me. Reworded v2 coming up soon.

//Snild