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authorLeo Yan <leo.yan@linaro.org>2019-07-08 22:39:37 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-07-09 10:13:27 -0300
commit0702f23c983b8a921853c33a9f59b9cf0975d36e (patch)
tree60594709095738a05f980f0f3dc31480ff1a27a7 /tools/perf
parent72de3fd97f15d75657dd5389e26801cbf8af0f9a (diff)
perf cs-etm: Fix potential NULL pointer dereference found by the smatch
tool 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> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20190708143937.7722-5-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/cs-etm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 508e4a3ddc8c..67b88b599a53 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -2538,7 +2538,7 @@ 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,