| Message ID | 20190708143937.7722-5-leo.yan@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | perf: Fix errors detected by Smatch | expand |
On Mon, 8 Jul 2019 at 08:40, Leo Yan <leo.yan@linaro.org> wrote: > > Based on the following report from Smatch, fix the potential > NULL pointer dereference check. > > tools/perf/util/cs-etm.c:2545 > cs_etm__process_auxtrace_info() error: we previously assumed > 'session->itrace_synth_opts' could be null (see line 2541) > > tools/perf/util/cs-etm.c > 2541 if (session->itrace_synth_opts && session->itrace_synth_opts->set) { > 2542 etm->synth_opts = *session->itrace_synth_opts; > 2543 } else { > 2544 itrace_synth_opts__set_default(&etm->synth_opts, > 2545 session->itrace_synth_opts->default_no_sample); > ^^^^^^^^^^^^^^^^^^^^^^^^^^ > 2546 etm->synth_opts.callchain = false; > 2547 } > > 'session->itrace_synth_opts' is impossible to be a NULL pointer in > cs_etm__process_auxtrace_info(), thus this patch removes the NULL > test for 'session->itrace_synth_opts'. > > Signed-off-by: Leo Yan <leo.yan@linaro.org> > --- > tools/perf/util/cs-etm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c > index ad43a6e31827..ab578a06a790 100644 > --- a/tools/perf/util/cs-etm.c > +++ b/tools/perf/util/cs-etm.c > @@ -2537,7 +2537,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event, > return 0; > } > > - if (session->itrace_synth_opts && session->itrace_synth_opts->set) { > + if (session->itrace_synth_opts->set) { > etm->synth_opts = *session->itrace_synth_opts; > } else { > itrace_synth_opts__set_default(&etm->synth_opts, This is in accordance with what was previously discussed. Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> > -- > 2.17.1 >
Em Mon, Jul 08, 2019 at 11:38:48AM -0600, Mathieu Poirier escreveu: > On Mon, 8 Jul 2019 at 08:40, Leo Yan <leo.yan@linaro.org> wrote: > > > > Based on the following report from Smatch, fix the potential > > NULL pointer dereference check. > > > > tools/perf/util/cs-etm.c:2545 > > cs_etm__process_auxtrace_info() error: we previously assumed > > 'session->itrace_synth_opts' could be null (see line 2541) > > > > tools/perf/util/cs-etm.c > > 2541 if (session->itrace_synth_opts && session->itrace_synth_opts->set) { > > 2542 etm->synth_opts = *session->itrace_synth_opts; > > 2543 } else { > > 2544 itrace_synth_opts__set_default(&etm->synth_opts, > > 2545 session->itrace_synth_opts->default_no_sample); > > ^^^^^^^^^^^^^^^^^^^^^^^^^^ > > 2546 etm->synth_opts.callchain = false; > > 2547 } > > > > 'session->itrace_synth_opts' is impossible to be a NULL pointer in > > cs_etm__process_auxtrace_info(), thus this patch removes the NULL > > test for 'session->itrace_synth_opts'. > > > > Signed-off-by: Leo Yan <leo.yan@linaro.org> > > --- > > tools/perf/util/cs-etm.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c > > index ad43a6e31827..ab578a06a790 100644 > > --- a/tools/perf/util/cs-etm.c > > +++ b/tools/perf/util/cs-etm.c > > @@ -2537,7 +2537,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event, > > return 0; > > } > > > > - if (session->itrace_synth_opts && session->itrace_synth_opts->set) { > > + if (session->itrace_synth_opts->set) { > > etm->synth_opts = *session->itrace_synth_opts; > > } else { > > itrace_synth_opts__set_default(&etm->synth_opts, > > This is in accordance with what was previously discussed. > > Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Thanks, applied. - Arnaldo
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index ad43a6e31827..ab578a06a790 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -2537,7 +2537,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event, return 0; } - if (session->itrace_synth_opts && session->itrace_synth_opts->set) { + if (session->itrace_synth_opts->set) { etm->synth_opts = *session->itrace_synth_opts; } else { itrace_synth_opts__set_default(&etm->synth_opts,
Based on the following report from Smatch, fix the potential NULL pointer dereference check. tools/perf/util/cs-etm.c:2545 cs_etm__process_auxtrace_info() error: we previously assumed 'session->itrace_synth_opts' could be null (see line 2541) tools/perf/util/cs-etm.c 2541 if (session->itrace_synth_opts && session->itrace_synth_opts->set) { 2542 etm->synth_opts = *session->itrace_synth_opts; 2543 } else { 2544 itrace_synth_opts__set_default(&etm->synth_opts, 2545 session->itrace_synth_opts->default_no_sample); ^^^^^^^^^^^^^^^^^^^^^^^^^^ 2546 etm->synth_opts.callchain = false; 2547 } 'session->itrace_synth_opts' is impossible to be a NULL pointer in cs_etm__process_auxtrace_info(), thus this patch removes the NULL test for 'session->itrace_synth_opts'. Signed-off-by: Leo Yan <leo.yan@linaro.org> --- tools/perf/util/cs-etm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.17.1