From ea565fbf4918574921655856b0a4b2ebc16640ba Mon Sep 17 00:00:00 2001
From: Ben Kurtovic <ben.kurtovic@gmail.com>
Date: Sun, 1 Dec 2019 23:29:16 -0500
Subject: [PATCH] Fix an ASan-reported heap corruption

---
 src/config.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/config.c b/src/config.c
index db6eed0..0c7d9ee 100644
--- a/src/config.c
+++ b/src/config.c
@@ -403,10 +403,11 @@ static bool set_defaults(Config *config)
         return false;
     }
     if (!assembler && !config->sav_path && !config->no_saving) {
+        const char *ext = ".sav";
         config->sav_path = cr_malloc(sizeof(char) *
-            (strlen(config->rom_path) + 4));
+            (strlen(config->rom_path) + strlen(ext) + 1));
         strcpy(config->sav_path, config->rom_path);
-        strcat(config->sav_path, ".sav");
+        strcat(config->sav_path, ext);
     }
     return true;
 }