linux-kernel - Re: [PATCH] perf: fix infinite loop with corrupted header

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Message-ID: <52443800.5080200@gmail.com>
Date:	Thu, 26 Sep 2013 07:34:56 -0600
From:	David Ahern <dsahern@...il.com>
To:	Sonny Rao <sonnyrao@...omium.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] perf: fix infinite loop with corrupted header

On 9/25/13 11:20 PM, Sonny Rao wrote:
> We recently ran into a corrupt perf data file which mostly looked okay
> but the section size for data was set to 0.  This caused perf report to
> get into an infinite loop in __perf_session_process_events().  Let's
> just avoid this by bailing early and reporting it if there's an
> invalid header.

Been suggested before:
https://lkml.org/lkml/2013/5/9/405

Other changes went in around that time as well. Are you still seeing the 
loop on latest source?

David
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