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Date:   Sat, 7 Mar 2020 11:45:01 +0100
From:   Jiri Olsa <>
To:     Ian Rogers <>
Cc:     Peter Zijlstra <>,
        Ingo Molnar <>,
        Arnaldo Carvalho de Melo <>,
        Mark Rutland <>,
        Alexander Shishkin <>,
        Namhyung Kim <>,
        Andi Kleen <>,
        Adrian Hunter <>,
        Leo Yan <>,,,
        Stephane Eranian <>
Subject: Re: [PATCH 1/1] perf/tool: fix read in event parsing

On Fri, Mar 06, 2020 at 11:31:21PM -0800, Ian Rogers wrote:
> ADD_CONFIG_TERM accesses term->weak, however, in get_config_chgs this
> value is accessed outside of the list_for_each_entry and references
> invalid memory. Add an argument for ADD_CONFIG_TERM for weak and set it
> to false in the get_config_chgs case.
> This bug was cause by clang's address sanitizer and libfuzzer. It can be
> reproduced with a command line of:
>   perf stat -a -e i/bs,tsc,L2/o
> Signed-off-by: Ian Rogers <>

nice catch

Acked-by: Jiri Olsa <>


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