This patch fixes a possible null pointer dereference in intel_bts_process_auxtrace_info, detected by the semantic patch deref_null.cocci, with the following warning:
./tools/perf/util/intel-bts.c:921:32-49: ERROR: session -> itrace_synth_opts is NULL but dereferenced. Signed-off-by: Wen Yang <wen.yan...@zte.com.cn> Reviewed-by: Tan Hu <tan...@zte.com.cn> CC: Julia Lawall <julia.law...@lip6.fr> --- tools/perf/util/intel-bts.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/intel-bts.c b/tools/perf/util/intel-bts.c index 7b27d77..b0258f4 100644 --- a/tools/perf/util/intel-bts.c +++ b/tools/perf/util/intel-bts.c @@ -917,7 +917,8 @@ int intel_bts_process_auxtrace_info(union perf_event *event, if (session->itrace_synth_opts && session->itrace_synth_opts->set) { bts->synth_opts = *session->itrace_synth_opts; } else { - itrace_synth_opts__set_default(&bts->synth_opts, + if (session->itrace_synth_opts) + itrace_synth_opts__set_default(&bts->synth_opts, session->itrace_synth_opts->default_no_sample); if (session->itrace_synth_opts) bts->synth_opts.thread_stack = -- 2.9.5