Clear config item writing buffer before freeing it

This buffer may be used to store items like passwords, so better clean
it explicitly to avoid possibility of leaving such items in heap memory
unnecessarily.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

diff --git a/wpa_supplicant/config_file.c b/wpa_supplicant/config_file.c
index 9b14699aefa9d0827f383e2f41a15e619d6feaa8..f1d865ccb8a3299993c7c5486d8ac04808876da0 100644 (file)
--- a/wpa_supplicant/config_file.c
+++ b/wpa_supplicant/config_file.c
@@ -493,7 +493,7 @@ static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
        if (value == NULL)
                return;
        fprintf(f, "\t%s=%s\n", field, value);
-       os_free(value);
+       str_clear_free(value);
 }