1 files changed, 8 insertions, 2 deletions

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 0a9ae8014729..dfd00c6dad6e 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -19,8 +19,10 @@ int thread__init_map_groups(struct thread *thread, struct machine *machine)
                 thread->mg = map_groups__new(machine);
         } else {
                 leader = __machine__findnew_thread(machine, pid, pid);
-                if (leader)
+                if (leader) {
                         thread->mg = map_groups__get(leader->mg);
+                        thread__put(leader);
+                }
         }
 
         return thread->mg ? 0 : -1;
@@ -53,7 +55,7 @@ struct thread *thread__new(pid_t pid, pid_t tid)
                         goto err_thread;
 
                 list_add(&comm->list, &thread->comm_list);
-                atomic_set(&thread->refcnt, 0);
+                atomic_set(&thread->refcnt, 1);
                 RB_CLEAR_NODE(&thread->rb_node);
         }
 
@@ -95,6 +97,10 @@ struct thread *thread__get(struct thread *thread)
 void thread__put(struct thread *thread)
 {
         if (thread && atomic_dec_and_test(&thread->refcnt)) {
+                /*
+                 * Remove it from the dead_threads list, as last reference
+                 * is gone.
+                 */
                 list_del_init(&thread->node);
                 thread__delete(thread);
         }