linux-kernel - Re: [PATCH v1 00/11] perf: Fix errors detected by Smatch

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Message-ID: <20190703014808.GC6852@leoy-ThinkPad-X240s>
Date:   Wed, 3 Jul 2019 09:48:08 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Andi Kleen <ak@...ux.intel.com>,
        "David S. Miller" <davem@...emloft.net>,
        Davidlohr Bueso <dave@...olabs.net>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Song Liu <songliubraving@...com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexios Zavras <alexios.zavras@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Changbin Du <changbin.du@...el.com>,
        Eric Saint-Etienne <eric.saint.etienne@...cle.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1 00/11] perf: Fix errors detected by Smatch

On Tue, Jul 02, 2019 at 01:07:43PM +0200, Jiri Olsa wrote:
> On Tue, Jul 02, 2019 at 06:34:09PM +0800, Leo Yan wrote:
> > When I used static checker Smatch for perf building, the main target is
> > to check if there have any potential issues in Arm cs-etm code.  So
> > finally I get many reporting for errors/warnings.
> > 
> > I used below command for using static checker with perf building:
> > 
> >   # make VF=1 CORESIGHT=1 -C tools/perf/ \
> >     CHECK="/root/Work/smatch/smatch --full-path" \
> >     CC=/root/Work/smatch/cgcc | tee smatch_reports.txt
> > 
> > I reviewed the errors one by one, if I understood some of these errors
> > so changed the code as I can, this patch set is the working result; but
> > still leave some errors due to I don't know what's the best way to fix
> > it.  There also have many inconsistent indenting warnings.  So I firstly
> > send out this patch set and let's see what's the feedback from public
> > reviewing.
> > 
> > Leo Yan (11):
> >   perf report: Smatch: Fix potential NULL pointer dereference
> >   perf stat: Smatch: Fix use-after-freed pointer
> >   perf top: Smatch: Fix potential NULL pointer dereference
> >   perf annotate: Smatch: Fix dereferencing freed memory
> >   perf trace: Smatch: Fix potential NULL pointer dereference
> >   perf hists: Smatch: Fix potential NULL pointer dereference
> >   perf map: Smatch: Fix potential NULL pointer dereference
> >   perf session: Smatch: Fix potential NULL pointer dereference
> >   perf intel-bts: Smatch: Fix potential NULL pointer dereference
> >   perf intel-pt: Smatch: Fix potential NULL pointer dereference
> >   perf cs-etm: Smatch: Fix potential NULL pointer dereference
> 
> from quick look it all looks good to me, nice tool ;-)
> 
> Acked-by: Jiri Olsa <jolsa@...nel.org>

Thanks for reviewing, Jiri.

@Arnaldo, Just want to check, will you firstly pick up 01~05, 07,
08/11 patches if you think they are okay?  Or you want to wait me to
spin new patch set with all patches after I gather all comments?

Thanks,
Leo Yan

> >  tools/perf/builtin-report.c    |  4 ++--
> >  tools/perf/builtin-stat.c      |  2 +-
> >  tools/perf/builtin-top.c       |  8 ++++++--
> >  tools/perf/builtin-trace.c     |  5 +++--
> >  tools/perf/ui/browsers/hists.c | 13 +++++++++----
> >  tools/perf/util/annotate.c     |  6 ++----
> >  tools/perf/util/cs-etm.c       |  2 +-
> >  tools/perf/util/intel-bts.c    |  5 ++---
> >  tools/perf/util/intel-pt.c     |  5 ++---
> >  tools/perf/util/map.c          |  7 +++++--
> >  tools/perf/util/session.c      |  3 +++
> >  11 files changed, 36 insertions(+), 24 deletions(-)
> > 
> > -- 
> > 2.17.1
> >