1 files changed, 6 insertions, 2 deletions
diff --git a/src/Monolog/Formatter/NormalizerFormatter.php b/src/Monolog/Formatter/NormalizerFormatter.php
index a76e2ae..801231e 100644
--- a/src/Monolog/Formatter/NormalizerFormatter.php
+++ b/src/Monolog/Formatter/NormalizerFormatter.php
@@ -55,8 +55,12 @@ class NormalizerFormatter implements FormatterInterface
         return $records;
     }
 
-    protected function normalize($data)
+    protected function normalize($data, $depth = 0)
     {
+        if ($depth > 9) {
+            return 'Over 9 levels deep, aborting normalization';
+        }
+
         if (null === $data || is_scalar($data)) {
             if (is_float($data)) {
                 if (is_infinite($data)) {
@@ -79,7 +83,7 @@ class NormalizerFormatter implements FormatterInterface
                     $normalized['...'] = 'Over 1000 items, aborting normalization';
                     break;
                 }
-                $normalized[$key] = $this->normalize($value);
+                $normalized[$key] = $this->normalize($value, $depth+1);
             }
 
             return $normalized;