linux-kernel - Re: [tip:tracing/blktrace-v2] blktrace: fix a bug in blk_msg

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Message-ID: <20090408090453.GC12283@elte.hu>
Date:	Wed, 8 Apr 2009 11:04:53 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	mingo@...hat.com, hpa@...or.com, acme@...hat.com,
	linux-kernel@...r.kernel.org, alan.brunelle@...com,
	jens.axboe@...cle.com, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:tracing/blktrace-v2] blktrace: fix a bug in
	blk_msg_write()


* Li Zefan <lizf@...fujitsu.com> wrote:

> Hi Ingo,
> 
> Though Carl <chlunde@...g.uio.no>'s patch has been applied,
> (a4b3ada83d06554d307dd54abdc62b2e5648264a), this patch hasn't
> been dropped, thus the code in -tip looks like:
> 
> static ssize_t blk_msg_write(...)
> {
> 	...
>         if (copy_from_user(msg, buffer, count)) {
>                 kfree(msg);
>                 return -EFAULT;
>         }
>         msg[count] = '\0';	<---
> 
>         msg[count] = '\0';	<---
> 	...
> }

indeed - that's a (harmless) merge artifact in tip/master, it has 
not propagated into the tracing topics and will go away on the next 
reintegration.

Thanks for letting me know, i'll keep an eye on it.

	Ingo
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