perf parse: If pmu configuration fails free terms

Avoid a memory leak when the configuration fails.

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/20191030223448.12930-9-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 578288c94d2a68f82d9dcea29c68e898edb3e129..a0a80f4e7038ad9dccd741c9e26354c64420d0fc 100644 (file)
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1388,8 +1388,15 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
        if (get_config_terms(head_config, &config_terms))
                return -ENOMEM;
 
-       if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
+       if (perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
+               struct perf_evsel_config_term *pos, *tmp;
+
+               list_for_each_entry_safe(pos, tmp, &config_terms, list) {
+                       list_del_init(&pos->list);
+                       free(pos);
+               }
                return -EINVAL;
+       }
 
        evsel = __add_event(list, &parse_state->idx, &attr,
                            get_config_name(head_config), pmu,