1 files changed, 4 insertions, 0 deletions
diff --git a/apps/buffering.c b/apps/buffering.c
index 84a6fca3d6..e2057d17ab 100644
--- a/apps/buffering.c
+++ b/apps/buffering.c
@@ -522,6 +522,8 @@ static void update_data_counters(void)
     size_t remaining = 0;
     size_t useful = 0;
 
+    mutex_lock(&llist_mutex);
+
     m = first_handle;
     while (m) {
         buffered += m->available;
@@ -537,6 +539,8 @@ static void update_data_counters(void)
         m = m->next;
     }
 
+    mutex_unlock(&llist_mutex);
+
     data_counters.buffered = buffered;
     data_counters.wasted = wasted;
     data_counters.remaining = remaining;