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Subject[PATCH 1/9] perf evlist: Fix cpu/thread map leak
Asan reported leak of cpu and thread maps as they have one more
refcount than released. I found that after setting evlist maps it
should release it's refcount.

It seems to be broken from the beginning so I chose the original
commit as the culprit. But not sure how it's applied to stable trees
since there are many changes in the code after that.

Fixes: 7e2ed097538c5 ("perf evlist: Store pointer to the cpu and thread maps")
Fixes: 4112eb1899c0e ("perf evlist: Default to syswide target when no thread/cpu maps set")
Signed-off-by: Namhyung Kim <>
tools/perf/util/evlist.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index e3fa3bf7498a..c0768c61eb43 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -946,6 +946,10 @@ int perf_evlist__create_maps(struct evlist *evlist, struct target *target)

perf_evlist__set_maps(&evlist->core, cpus, threads);

+ /* as evlist now has references, put count here */
+ perf_cpu_map__put(cpus);
+ perf_thread_map__put(threads);
return 0;

@@ -1273,11 +1277,12 @@ static int perf_evlist__create_syswide_maps(struct evlist *evlist)
goto out_put;

perf_evlist__set_maps(&evlist->core, cpus, threads);
- return err;
+ perf_thread_map__put(threads);
- goto out;
+ return err;

int evlist__open(struct evlist *evlist)
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