diff --git a/src/tools/opensc-explorer.c b/src/tools/opensc-explorer.c
index 41e620a..57f8a79 100644
--- a/src/tools/opensc-explorer.c
+++ b/src/tools/opensc-explorer.c
@@ -1839,6 +1839,12 @@ static int do_apdu(int argc, char **argv)
 	if (argc < 1)
 		return usage(do_apdu);
 
+	/* gcc-11 complains about BUF potentially being used without being
+	   initialized.  I can't convince myself that the calls to
+	   parse_string_or_hexdata will fully initialize it, so we just
+	   initialize it here.  */
+	memset (buf, 0, sizeof (buf));
+
 	/* loop over the args and parse them, making sure the result fits into buf[] */
 	for (i = 0, len = 0; i < (unsigned) argc && len < sizeof(buf); i++)   {
 		size_t len0 = sizeof(buf) - len;
commit 1680b3a1fb15319e41dbe3214ef8c4a4c215d529
Author: Jakub Jelen <jjelen@redhat.com>
Date:   Tue Feb 23 19:57:02 2021 +0100

    Fix build on gcc11
    
    This made most of the applications crashing in Fedora 34 when
    smart card was plugged in.
    
    The suggested patch makes the code path more obvious for gcc to
    handle.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1930652

diff --git a/src/pkcs11/framework-pkcs15.c b/src/pkcs11/framework-pkcs15.c
index 18803b83..c65ec3ed 100644
--- a/src/pkcs11/framework-pkcs15.c
+++ b/src/pkcs11/framework-pkcs15.c
@@ -670,6 +670,7 @@ __pkcs15_create_cert_object(struct pkcs15_fw_data *fw_data, struct sc_pkcs15_obj
 {
 	struct sc_pkcs15_cert_info *p15_info = NULL;
 	struct sc_pkcs15_cert *p15_cert = NULL;
+	struct pkcs15_any_object *any_object = NULL;
 	struct pkcs15_cert_object *object = NULL;
 	struct pkcs15_pubkey_object *obj2 = NULL;
 	int rv;
@@ -686,8 +687,9 @@ __pkcs15_create_cert_object(struct pkcs15_fw_data *fw_data, struct sc_pkcs15_obj
 	}
 
 	/* Certificate object */
-	rv = __pkcs15_create_object(fw_data, (struct pkcs15_any_object **) &object,
+	rv = __pkcs15_create_object(fw_data, &any_object,
 			cert, &pkcs15_cert_ops, sizeof(struct pkcs15_cert_object));
+	object = (struct pkcs15_cert_object *) any_object;
 	if (rv < 0) {
 		if (p15_cert != NULL)
 			sc_pkcs15_free_certificate(p15_cert);
@@ -720,7 +722,7 @@ __pkcs15_create_cert_object(struct pkcs15_fw_data *fw_data, struct sc_pkcs15_obj
 	pkcs15_cert_extract_label(object);
 
 	if (cert_object != NULL)
-		*cert_object = (struct pkcs15_any_object *) object;
+		*cert_object = any_object;
 
 	return 0;
 }
@@ -730,6 +732,7 @@ static int
 __pkcs15_create_pubkey_object(struct pkcs15_fw_data *fw_data,
 	struct sc_pkcs15_object *pubkey, struct pkcs15_any_object **pubkey_object)
 {
+	struct pkcs15_any_object *any_object = NULL;
 	struct pkcs15_pubkey_object *object = NULL;
 	struct sc_pkcs15_pubkey *p15_key = NULL;
 	int rv;
@@ -758,8 +761,9 @@ __pkcs15_create_pubkey_object(struct pkcs15_fw_data *fw_data,
 	}
 
 	/* Public key object */
-	rv = __pkcs15_create_object(fw_data, (struct pkcs15_any_object **) &object,
+	rv = __pkcs15_create_object(fw_data, &any_object,
 			pubkey, &pkcs15_pubkey_ops, sizeof(struct pkcs15_pubkey_object));
+	object = (struct pkcs15_pubkey_object *) any_object;
 	if (rv >= 0) {
 		object->pub_info = (struct sc_pkcs15_pubkey_info *) pubkey->data;
 		object->pub_data = p15_key;
@@ -773,7 +777,7 @@ __pkcs15_create_pubkey_object(struct pkcs15_fw_data *fw_data,
 			object->pub_data->alg_id->params = &((object->pub_data->u).gostr3410.params);
 	}
 	if (pubkey_object != NULL)
-		*pubkey_object = (struct pkcs15_any_object *) object;
+		*pubkey_object = any_object;
 
 	return rv;
 }
@@ -783,16 +787,18 @@ static int
 __pkcs15_create_prkey_object(struct pkcs15_fw_data *fw_data,
 	struct sc_pkcs15_object *prkey, struct pkcs15_any_object **prkey_object)
 {
+	struct pkcs15_any_object *any_object = NULL;
 	struct pkcs15_prkey_object *object = NULL;
 	int rv;
 
-	rv = __pkcs15_create_object(fw_data, (struct pkcs15_any_object **) &object,
+	rv = __pkcs15_create_object(fw_data, &any_object,
 			prkey, &pkcs15_prkey_ops, sizeof(struct pkcs15_prkey_object));
+	object = (struct pkcs15_prkey_object *) any_object;
 	if (rv >= 0)
 		object->prv_info = (struct sc_pkcs15_prkey_info *) prkey->data;
 
 	if (prkey_object != NULL)
-		*prkey_object = (struct pkcs15_any_object *) object;
+		*prkey_object = any_object;
 
 	return rv;
 }
@@ -802,18 +808,20 @@ static int
 __pkcs15_create_data_object(struct pkcs15_fw_data *fw_data,
 		struct sc_pkcs15_object *object, struct pkcs15_any_object **data_object)
 {
+	struct pkcs15_any_object *any_object = NULL;
 	struct pkcs15_data_object *dobj = NULL;
 	int rv;
 
-	rv = __pkcs15_create_object(fw_data, (struct pkcs15_any_object **) &dobj,
+	rv = __pkcs15_create_object(fw_data, &any_object,
 			object, &pkcs15_dobj_ops, sizeof(struct pkcs15_data_object));
+        dobj = (struct pkcs15_data_object *) any_object;
 	if (rv >= 0)   {
 		dobj->info = (struct sc_pkcs15_data_info *) object->data;
 		dobj->value = NULL;
 	}
 
 	if (data_object != NULL)
-		*data_object = (struct pkcs15_any_object *) dobj;
+		*data_object = any_object;
 
 	return rv;
 }
@@ -853,16 +861,18 @@ static int
 __pkcs15_create_secret_key_object(struct pkcs15_fw_data *fw_data,
 		struct sc_pkcs15_object *object, struct pkcs15_any_object **skey_object)
 {
+	struct pkcs15_any_object *any_object = NULL;
 	struct pkcs15_skey_object *skey = NULL;
 	int rv;
 
-	rv = __pkcs15_create_object(fw_data, (struct pkcs15_any_object **) &skey,
+	rv = __pkcs15_create_object(fw_data, &any_object,
 			object, &pkcs15_skey_ops, sizeof(struct pkcs15_skey_object));
+        skey = (struct pkcs15_skey_object *) any_object;
 	if (rv >= 0)
 		skey->info = (struct sc_pkcs15_skey_info *) object->data;
 
 	if (skey_object != NULL)
-		*skey_object = (struct pkcs15_any_object *) skey;
+		*skey_object = any_object;
 
 	return rv;
 }