From 77ad61013675cb819067d6b2c3a28f9fd50c5044 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Tue, 15 Sep 2020 12:18:17 +0900 Subject: [PATCH] perf metric: Do not free metric when failed to resolve It's dangerous to free the original metric when it's called from resolve_metric() as it's already in the metric_list and might have other resources too. Instead, it'd better let them bail out and be released properly at the later stage. So add a check when it's called from metricgroup__add_metric() and release it. Also make sure that mp is set properly. Fixes: aec16d025ee01 ("perf metric: Collect referenced metrics in struct metric_ref_node") Signed-off-by: Namhyung Kim Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Andi Kleen Cc: Ian Rogers Cc: Mark Rutland Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20200915031819.386559-10-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/metricgroup.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c index c8904e471a71e..ab5030fcfed4e 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -672,7 +672,6 @@ static int __add_metric(struct list_head *metric_list, m->has_constraint = metric_no_group || metricgroup__has_constraint(pe); INIT_LIST_HEAD(&m->metric_refs); m->metric_refs_cnt = 0; - *mp = m; parent = expr_ids__alloc(ids); if (!parent) { @@ -685,6 +684,7 @@ static int __add_metric(struct list_head *metric_list, free(m); return -ENOMEM; } + *mp = m; } else { /* * We got here for the referenced metric, via the @@ -719,8 +719,11 @@ static int __add_metric(struct list_head *metric_list, * all the metric's IDs and add it to the parent context. */ if (expr__find_other(pe->metric_expr, NULL, &m->pctx, runtime) < 0) { - expr__ctx_clear(&m->pctx); - free(m); + if (m->metric_refs_cnt == 0) { + expr__ctx_clear(&m->pctx); + free(m); + *mp = NULL; + } return -EINVAL; } -- 2.39.5