perf tools: Use list_del_init() more thorougly
To allow for destructors to check if they're operating on a object still
in a list, and to avoid going from use after free list entries into
still valid, or even also other already removed from list entries.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-deh17ub44atyox3j90e6rksu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 9b0ee0e..f24fd195 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -2741,10 +2741,10 @@ static void hists_evsel__exit(struct perf_evsel *evsel)
list_for_each_entry_safe(node, tmp, &hists->hpp_formats, list) {
perf_hpp_list__for_each_format_safe(&node->hpp, fmt, pos) {
- list_del(&fmt->list);
+ list_del_init(&fmt->list);
free(fmt);
}
- list_del(&node->list);
+ list_del_init(&node->list);
free(node);
}
}