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| author | Gaurav Singh <gaurav1086@gmail.com> | 2020-06-08 19:18:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-25 16:41:58 +0300 |
| commit | 4e92c1239c13b29d248c9292955cb3526f0add42 (patch) | |
| tree | 598e088f2516905fda2c137194d3406d7aea6dac | |
| parent | 5410d158ca2a50bcf3f48c57f6cd73f4cf479e69 (diff) | |
| download | linux-4e92c1239c13b29d248c9292955cb3526f0add42.tar.xz | |
perf report: Fix NULL pointer dereference in hists__fprintf_nr_sample_events()
[ 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>
| -rw-r--r-- | tools/perf/builtin-report.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 429c3e140dc3..35a10b598544 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"); } |