Messages in this thread Patch in this message | | | From | Leo Yan <> | Subject | [PATCH v2 4/4] perf cs-etm: Smatch: Fix potential NULL pointer dereference | Date | Mon, 8 Jul 2019 22:39:37 +0800 |
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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, -- 2.17.1
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