From 52158e73fa74d7b9274846fad72cc7c557abcacb Mon Sep 17 00:00:00 2001
From: Ingo Franzki <ifranzki@linux.ibm.com>
Date: Tue, 30 Jun 2026 14:02:06 +0200
Subject: [PATCH] libekmfweb: Fix invalid free in error path of
 parse_json_web_token()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Don't attempt to free the local function parameter 'signature', but the
memory where *signature points to.

Assisted-by: IBM Bob:2.0.0
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Finn Callies <fcallies@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
---
 libekmfweb/utilities.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libekmfweb/utilities.c b/libekmfweb/utilities.c
index 1ccf934b..e9f308ec 100644
--- a/libekmfweb/utilities.c
+++ b/libekmfweb/utilities.c
@@ -366,9 +366,9 @@ out:
 		*payload_obj = pld;
 	else
 		json_object_put(pld);
-	if (signature != NULL && rc != 0) {
-		free(signature);
-		signature = NULL;
+	if (signature != NULL && *signature != NULL && rc != 0) {
+		free(*signature);
+		*signature = NULL;
 		*signature_len = 0;
 	}
 	if (json != NULL)