1 files changed, 8 insertions, 4 deletions
diff --git a/apps/engine.c b/apps/engine.c
index b60bfbc294..3b395b1c7d 100644
--- a/apps/engine.c
+++ b/apps/engine.c
@@ -107,13 +107,17 @@ static int append_buf(char **buf, int *size, const char *s)
     }
 
     if (strlen(*buf) + strlen(s) >= (unsigned int)*size) {
+        char *tmp;
         *size += 256;
-        *buf = OPENSSL_realloc(*buf, *size);
+        tmp = OPENSSL_realloc(*buf, *size);
+        if (tmp == NULL) {
+            OPENSSL_free(*buf);
+            *buf = NULL;
+            return 0;
+        }
+        *buf = tmp;
     }
 
-    if (*buf == NULL)
-        return 0;
-
     if (**buf != '\0')
         OPENSSL_strlcat(*buf, ", ", *size);
     OPENSSL_strlcat(*buf, s, *size);