linux-kernel - Re: perf: fuzzer KASAN slab-out-of-bounds in snb_uncore_imc_event

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Message-ID: <CACT4Y+Zt3ujT=etVM2r_ygXnMexHv=_wn3bT+uvNbnGVDSKNsA@mail.gmail.com>
Date:   Tue, 15 Nov 2016 14:56:46 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Vince Weaver <vincent.weaver@...ne.edu>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Dave Jones <davej@...emonkey.org.uk>,
        Stephane Eranian <eranian@...il.com>
Subject: Re: perf: fuzzer KASAN slab-out-of-bounds in snb_uncore_imc_event_del

On Tue, Nov 15, 2016 at 2:52 PM, Vince Weaver <vincent.weaver@...ne.edu> wrote:
> On Tue, 15 Nov 2016, Dmitry Vyukov wrote:
>
>> If you pipe the report through
>> https://github.com/google/sanitizers/blob/master/address-sanitizer/tools/kasan_symbolize.py
>> it will give you line numbers and inlined frames.
>
> is there any documentation for that program?

the source code...

> If I run the dump through
> it, it removes the timestamps and as far as I can see doesn't do anything
> else.

There are 4 flags:
https://github.com/google/sanitizers/blob/master/address-sanitizer/tools/kasan_symbolize.py#L315

The only important one is --linux which should point to a dir with
vmlinux. Default value is cwd.
Also do you have kernel built with debug info? No debug info, no lines.