linux-kernel - Re: [PATCH v2 02/10] perf, tools, stat: Avoid memory overrun with -r

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Message-ID: <20190319192023.GX24002@tassilo.jf.intel.com>
Date:   Tue, 19 Mar 2019 12:20:23 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     Andi Kleen <andi@...stfloor.org>, jolsa@...nel.org,
        linux-perf-users@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 02/10] perf, tools, stat: Avoid memory overrun with -r

> mmap size 8192B
> perf: util/evlist.c:533: perf_evlist__id_add: Assertion `evsel->ids < evsel->sample_id->max_x * evsel->sample_id->max_y' failed.

I suspect this is a latent bug just caught by my assert.

So it was already broken.

You could of course remove the assert, but it would merely
hide it.

-Andi

> test child interrupted
> ---- end ----
> Read backward ring buffer: FAILED!
> 
> 
> I'm removing it till we go thru it to figure out what is the best way to
> go, not to get in the way of the other patches going upstream.
> 
> - Arnaldo