From 3da0bcb4b4e27d115a2d6eb47cd0cebc33d34a61 Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Wed, 6 Jun 2018 10:24:18 +0200
Subject: [PATCH] tm: free new tm cell in case of error if it was not
 referenced

- part of t_uac_prepare(), reported by GH #1554

(cherry picked from commit f94770840029c1c73ab129f4b71fcb0cf146d808)
---
 src/modules/tm/uac.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/modules/tm/uac.c b/src/modules/tm/uac.c
index ff466760dd2..9b2f51b5f68 100644
--- a/src/modules/tm/uac.c
+++ b/src/modules/tm/uac.c
@@ -583,11 +583,18 @@ static inline int t_uac_prepare(uac_req_t *uac_r,
 
 error2:
 #ifdef TM_DEL_UNREF
-	if (!is_ack) {
-		UNREF_FREE(new_cell);
-	}else
-#endif
+	if (is_ack) {
 		free_cell(new_cell);
+	} else {
+		if(atomic_get_int(&new_cell->ref_count)==0) {
+			free_cell(new_cell);
+		} else {
+			UNREF_FREE(new_cell);
+		}
+	}
+#else
+	free_cell(new_cell);
+#endif
 error3:
 	return ret;
 }