diff options
| author | Ian Rogers <irogers@google.com> | 2019-10-25 21:08:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 18:44:58 +0300 |
| commit | 07e9503a23913439124fc056ffe12538a1311b65 (patch) | |
| tree | 045abcecfdd5f2c329262367c72230620caa6713 /tools | |
| parent | 1302caaef52ab9401d080d6a31eab9166be560cd (diff) | |
| download | linux-07e9503a23913439124fc056ffe12538a1311b65.tar.xz | |
perf tools: Splice events onto evlist even on error
[ Upstream commit 8e8714c3d157568b7a769917a5e05573bbaf5af0 ]
If event parsing fails the event list is leaked, instead splice the list
onto the out result and let the caller cleanup.
An example input for parse_events found by libFuzzer that reproduces
this memory leak is 'm{'.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: bpf@vger.kernel.org
Cc: clang-built-linux@googlegroups.com
Cc: netdev@vger.kernel.org
Link: http://lore.kernel.org/lkml/20191025180827.191916-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/parse-events.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index b5e2adef49de..d5ea043d3fc4 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1927,15 +1927,20 @@ int parse_events(struct evlist *evlist, const char *str, ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS); perf_pmu__parse_cleanup(); + + if (!ret && list_empty(&parse_state.list)) { + WARN_ONCE(true, "WARNING: event parser found nothing\n"); + return -1; + } + + /* + * Add list to the evlist even with errors to allow callers to clean up. + */ + perf_evlist__splice_list_tail(evlist, &parse_state.list); + if (!ret) { struct evsel *last; - if (list_empty(&parse_state.list)) { - WARN_ONCE(true, "WARNING: event parser found nothing\n"); - return -1; - } - - perf_evlist__splice_list_tail(evlist, &parse_state.list); evlist->nr_groups += parse_state.nr_groups; last = evlist__last(evlist); last->cmdline_group_boundary = true; |