perf report: Fix leak of resolved callchains array on error path

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 1cae877..3a70c58 100644 (file)
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -83,7 +83,7 @@ static int perf_session__add_hist_entry(struct perf_session *self,
        struct map_symbol *syms = NULL;
        struct symbol *parent = NULL;
        bool hit;
-       int err;
+       int err = -ENOMEM;
        struct hist_entry *he;
        struct event_stat_id *stats;
        struct perf_event_attr *attr;
@@ -101,26 +101,24 @@ static int perf_session__add_hist_entry(struct perf_session *self,
        else
                stats = get_stats(self, data->id, 0, 0);
        if (stats == NULL)
-               return -ENOMEM;
+               goto out_free_syms;
        he = __perf_session__add_hist_entry(&stats->hists, al, parent,
                                            data->period, &hit);
        if (he == NULL)
-               return -ENOMEM;
+               goto out_free_syms;
 
        if (hit)
                __perf_session__add_count(he, al,  data->period);
 
+       err = 0;
        if (symbol_conf.use_callchain) {
                if (!hit)
                        callchain_init(he->callchain);
                err = append_chain(he->callchain, data->callchain, syms);
-               free(syms);
-
-               if (err)
-                       return err;
        }
-
-       return 0;
+out_free_syms:
+       free(syms);
+       return err;
 }
 
 static int add_event_total(struct perf_session *session,