linux-kernel - Re: [PATCH] perf: fix buffer overflow error caused by specifying all tracepoints with -e option

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Message-ID: <691812110.287231.1294370209472.JavaMail.root@zmail04.collab.prod.int.phx2.redhat.com>
Date:	Thu, 6 Jan 2011 22:16:49 -0500 (EST)
From:	Pingtian Han <phan@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: fix buffer overflow error caused by specifying
	all tracepoints with -e option

My mistake, it should be 'patch' other than 'comments'. Thanks!

----- Original Message -----
From: "Arnaldo Carvalho de Melo" <acme@...radead.org>
To: "Han Pingtian" <phan@...hat.com>
Cc: linux-kernel@...r.kernel.org
Sent: Friday, January 7, 2011 2:30:12 AM
Subject: Re: [PATCH] perf: fix buffer overflow error caused by specifying	all tracepoints with -e option

Em Thu, Jan 06, 2011 at 05:39:22PM +0800, Han Pingtian escreveu:
> I found when specifying all tracepoints with -e to one of subcommand,
> such as 'top', the program will trigger a buffer overflow error, like
> this:
> 
> *** buffer overflow detected ***: ./perf terminated
> ======= Backtrace: =========
<SNIP>
> ....
> The tracepoints are separated by comma, something like this:
> 
> perf top -e ...,kmem:kmalloc,kmem:kfree,kmem:kmem_cache_free,...
> 
> This comment will fix this problem.
> 
> The root reason of this problem is that store_event_type() is called
> with all the events, and will overflow the 'filename' at
> 
>     strncat(filename, orgname, strlen(orgname));
> 
> The comments will try to call store_event_type() when the event name has
> been found out.

s/comments/patch/g, right? Other than that looks fine, applying.

- Arnaldo
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