fixed coverity issues

- CID 145623 (#1 of 1): Resource leak (RESOURCE_LEAK)
- CID 269069 (#1 of 1): Resource leak (RESOURCE_LEAK)
- CID undefined (#1 of 1): Dereference before null check (REVERSE_INULL)

src/libopensc/asn1.c

@@ -158,8 +158,10 @@ static void print_hex(const u8 * buf, size_t buflen, size_t depth)
 	char *lines = malloc(lines_len);
 	char *line = lines;
 
-	if (buf == NULL || buflen == 0 || lines == NULL)
+	if (buf == NULL || buflen == 0 || lines == NULL) {
+		free(lines);
 		return;
+	}
 
 	sc_hex_dump(buf, buflen, lines, lines_len);
 

src/libopensc/ctx.c

@@ -808,6 +808,7 @@ int sc_context_create(sc_context_t **ctx_out, const sc_context_param_t *parm)
 	set_defaults(ctx, &opts);
 
 	if (0 != list_init(&ctx->readers)) {
+		sc_release_context(ctx);
 		return SC_ERROR_OUT_OF_MEMORY;
 	}
 	list_attributes_seeker(&ctx->readers, reader_list_seeker);

src/pkcs11/framework-pkcs15.c

@@ -1618,7 +1618,7 @@ pkcs15_login(struct sc_pkcs11_slot *slot, CK_USER_TYPE userType,
 		}
 	}
 
-	if (userType  == CKU_CONTEXT_SPECIFIC && pin_info) {
+	if (userType  == CKU_CONTEXT_SPECIFIC) {
 		int auth_meth_saved = pin_info->auth_method;
 
 		sc_log(context, "Setting SC_AC_CONTEXT_SPECIFIC");