From: Gaurav Singh gaurav1086@gmail.com
[ Upstream commit 11b6e5482e178055ec1f2444b55f2518713809d1 ]
The 'evname' variable can be NULL, as it is checked a few lines back, check it before using.
Fixes: 9e207ddfa207 ("perf report: Show call graph from reference events") Cc: Adrian Hunter adrian.hunter@intel.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Ingo Molnar mingo@redhat.com Cc: Jiri Olsa jolsa@kernel.org Cc: Kan Liang kan.liang@intel.com Cc: Mark Rutland mark.rutland@arm.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lore.kernel.org/lkml/ Signed-off-by: Gaurav Singh gaurav1086@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/builtin-report.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 429c3e140dc32..35a10b5985447 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -401,8 +401,7 @@ static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report if (evname != NULL) ret += fprintf(fp, " of event '%s'", evname);
- if (symbol_conf.show_ref_callgraph && - strstr(evname, "call-graph=no")) { + if (symbol_conf.show_ref_callgraph && evname && strstr(evname, "call-graph=no")) { ret += fprintf(fp, ", show reference callgraph"); }