Fixed buffer overflow in macro expansion

diff --git a/src/ulas.c b/src/ulas.c
index f516a27f05258a796ef069dfaf53be21e92f083f..e7dd2c400a61bd2deda334190ed03011e43999d3 100644 (file)
--- a/src/ulas.c
+++ b/src/ulas.c
@@ -826,7 +826,7 @@ char *ulas_preprocexpand(struct ulas_preproc *pp, const char *raw_line,
           }
 
           if (!tocat) {
-            ulas_strensr(&pp->line, valread + 1);
+            ulas_strensr(&pp->line, strlen(pp->line.buf) + valread + 1);
             strncat(pp->line.buf, val - valread, valread);
           } else {
             // make sure to include leading white space