linux-kernel - Re: [PATCH] perf jevents: Fix suspicious code in fixregex()

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20200904020952.GQ3495158@kernel.org>
Date:   Thu, 3 Sep 2020 23:09:52 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>, Jiri Olsa <jolsa@...hat.com>,
        William Cohen <wcohen@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <andi@...stfloor.org>,
        John Garry <john.garry@...wei.com>,
        Kajol Jain <kjain@...ux.ibm.com>
Subject: Re: [PATCH] perf jevents: Fix suspicious code in fixregex()

Em Fri, Sep 04, 2020 at 10:38:35AM +0900, Namhyung Kim escreveu:
> On Fri, Sep 4, 2020 at 3:41 AM Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> > Em Thu, Sep 03, 2020 at 10:47:39AM -0700, Ian Rogers escreveu:
> > > On Thu, Sep 3, 2020 at 8:25 AM Namhyung Kim <namhyung@...nel.org> wrote:
> > > > The new string should have enough space for the original string and
> > > > the back slashes IMHO.
> > > > Cc: John Garry <john.garry@...wei.com>
> > > > Cc: Kajol Jain <kjain@...ux.ibm.com>
> > > > Cc: Ian Rogers <irogers@...gle.com>
> > > > Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> > > Reviewed-by: Ian Rogers <irogers@...gle.com>
> > > Definitely looks like the right fix. I'm surprised this hasn't shown
> > > up in sanitizer testing.
 
> I guess the code didn't run on most arch (including x86) since
> they don't have backslashes.

> > Yeap, good catch! Namyung you forgot to add the Fixes tag + Cc the patch
> > author that introduced that bug, I did it:

> > Cc: William Cohen <wcohen@...hat.com>
> > Fixes: fbc2844e84038ce3 ("perf vendor events: Use more flexible pattern matching for CPU identification for mapfile.csv"

> > Please consider doing it next time :-)
 
> Oh, right!  Will do it later..

Thanks!

- Arnaldo