linux-kernel - Re: [PATCH v2] trace-cmd: prevent print_graph

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Message-ID: <1276615294.19578.1.camel@cndougla-ubuntu>
Date:	Tue, 15 Jun 2010 11:21:34 -0400
From:	Chase Douglas <chase.douglas@...onical.com>
To:	Steven Rostedt <srostedt@...hat.com>
Cc:	Valdis.Kletnieks@...edu, Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] trace-cmd: prevent print_graph_duration buffer
 overflow

On Tue, 2010-06-15 at 10:54 -0400, Steven Rostedt wrote:
> Quick note. Please send to my rostedt@...dmis.org address. I may not see
> messages here for weeks at a time. I author patches with my RH account
> just to "advertise" who I work for. But I sign-off-by with the account I
> want people to send to.

Ahh. I took the email address from the authors line like you said :). Is
this standard practice for others as well?

> On Tue, 2010-06-15 at 10:47 -0400, Chase Douglas wrote:
> > Passing n > sizeof(string) to snprintf can cause a glibc buffer overflow
> > condition. We know the exact size of nsecs_str, so use it along with the
> > the math to determine the longest string size we want.
> > 
> > Note that an overflow isn't really possible given the format of the
> > string. However, glibc would abort due to a runtime check.
> > 
> > Signed-off-by: Chase Douglas <chase.douglas@...onical.com>
> 
> Thanks!
> 
> Can you write a similar patch for the Linux kernel too. It may need to
> go to stable as well.

Sure

-- Chase

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