diff --git a/firehose.c b/firehose.c
index cf0b6af..515de8f 100644
--- a/firehose.c
+++ b/firehose.c
@@ -103,6 +103,8 @@ static void firehose_response_log(xmlNode *node)
 
 	value = xmlGetProp(node, (xmlChar*)"value");
 	printf("LOG: %s\n", value);
+
+	xmlFree(value);
 }
 
 static int firehose_read(struct qdl_device *qdl, int wait, int (*response_parser)(xmlNode *node))
@@ -153,8 +155,7 @@ static int firehose_read(struct qdl_device *qdl, int wait, int (*response_parser
 			for (node = nodes; node; node = node->next) {
 				if (xmlStrcmp(node->name, (xmlChar*)"log") == 0) {
 					firehose_response_log(node);
-				}
-				else if (xmlStrcmp(node->name, (xmlChar*)"response") == 0) {
+				} else if (xmlStrcmp(node->name, (xmlChar*)"response") == 0) {
 					if (!response_parser)
 						fprintf(stderr, "received response with no parser\n");
 					else
@@ -195,9 +196,14 @@ static int firehose_write(struct qdl_device *qdl, xmlDoc *doc)
 static int firehose_nop_parser(xmlNode *node)
 {
 	xmlChar *value;
+	int ret;
 
 	value = xmlGetProp(node, (xmlChar*)"value");
-	return !!xmlStrcmp(value, (xmlChar*)"ACK");
+	ret = !!xmlStrcmp(value, (xmlChar*)"ACK");
+
+	xmlFree(value);
+
+	return ret;
 }
 
 static size_t max_payload_size = 1048576;
@@ -215,9 +221,14 @@ static int firehose_configure_response_parser(xmlNode *node)
 	size_t max_size;
 
 	value = xmlGetProp(node, (xmlChar*)"value");
+	if (!value)
+		return -EINVAL;
+
 	payload = xmlGetProp(node, (xmlChar*)"MaxPayloadSizeToTargetInBytes");
-	if (!value || !payload)
+	if (!payload) {
+		xmlFree(value);
 		return -EINVAL;
+	}
 
 	max_size = strtoul((char*)payload, NULL, 10);
 
@@ -226,6 +237,7 @@ static int firehose_configure_response_parser(xmlNode *node)
 	 * a larger payload size
 	 */
 	if (!xmlStrcmp(value, (xmlChar*)"ACK")) {
+		xmlFree(payload);
 		payload = xmlGetProp(node, (xmlChar*)"MaxPayloadSizeToTargetInBytesSupported");
 		if (!payload)
 			return -EINVAL;
@@ -233,6 +245,9 @@ static int firehose_configure_response_parser(xmlNode *node)
 		max_size = strtoul((char*)payload, NULL, 10);
 	}
 
+	xmlFree(payload);
+	xmlFree(value);
+
 	return max_size;
 }
 
@@ -380,8 +395,7 @@ static int firehose_program(struct qdl_device *qdl, struct program *program, int
 		sparse_cb_info.total_write_count = sparse_file_len(s_file, false);
 
 		num_sectors = (sparse_cb_info.total_write_count + program->sector_size - 1) / program->sector_size;
-	}
-	else {
+	} else {
 		num_sectors = (sb.st_size + program->sector_size - 1) / program->sector_size;
 	}
 
@@ -432,8 +446,7 @@ static int firehose_program(struct qdl_device *qdl, struct program *program, int
 		ret = sparse_stream_callback(s_file, false, firehose_program_sparse, &sparse_cb_info);
 
 		sparse_file_destroy(s_file);
-	}
-	else {
+	} else {
 		left = num_sectors;
 		while (left > 0) {
 			chunk_size = MIN(max_payload_size / program->sector_size, left);
@@ -473,6 +486,7 @@ static int firehose_program(struct qdl_device *qdl, struct program *program, int
 
 out:
 	xmlFreeDoc(doc);
+	free(buf);
 	return ret;
 }
 
diff --git a/patch.c b/patch.c
index 445bc99..eefda5d 100644
--- a/patch.c
+++ b/patch.c
@@ -111,3 +111,28 @@ int patch_execute(struct qdl_device *qdl, int (*apply)(struct qdl_device *qdl, s
 
 	return 0;
 }
+
+void patch_unload(void)
+{
+	struct patch *patch;
+
+	patches_last = NULL;
+
+	for (patch = patches; patch; patch = patch->next) {
+		if (patch->filename)
+			xmlFree(patch->filename);
+		if (patch->start_sector)
+			xmlFree(patch->start_sector);
+		if (patch->value)
+			xmlFree(patch->value);
+		if (patch->what)
+			xmlFree(patch->what);
+
+		if (patches_last)
+			free(patches_last);
+
+		patches_last = patch;
+	}
+
+	free(patches_last);
+}
\ No newline at end of file
diff --git a/patch.h b/patch.h
index 108ec2f..ea0acdd 100644
--- a/patch.h
+++ b/patch.h
@@ -19,6 +19,7 @@ struct patch {
 };
 
 int patch_load(const char *patch_file);
+void patch_unload(void);
 int patch_execute(struct qdl_device *qdl, int (*apply)(struct qdl_device *qdl, struct patch *patch));
 
 #endif
diff --git a/program.c b/program.c
index 9704f61..9ed2bd9 100644
--- a/program.c
+++ b/program.c
@@ -172,3 +172,26 @@ int program_find_bootable_partition(void)
 
 	return part;
 }
+
+void program_unload(void)
+{
+	struct program *program;
+
+	programes_last = NULL;
+
+	for (program = programes; program; program = program->next) {
+		if (program->filename)
+			xmlFree(program->filename);
+		if (program->start_sector)
+			xmlFree(program->start_sector);
+		if (program->label)
+			xmlFree(program->label);
+
+		if (programes_last)
+			free(programes_last);
+
+		programes_last = program;
+	}
+
+	free(programes_last);
+}
\ No newline at end of file
diff --git a/program.h b/program.h
index be81853..8aee68b 100644
--- a/program.h
+++ b/program.h
@@ -19,6 +19,7 @@ struct program {
 };
 
 int program_load(const char *program_file);
+void program_unload(void);
 int program_execute(struct qdl_device *qdl, int (*apply)(struct qdl_device *qdl, struct program *program, int fd),
 		    const char *incdir);
 int program_find_bootable_partition(void);
diff --git a/qdl.c b/qdl.c
index c8ebf7b..9f91bc3 100644
--- a/qdl.c
+++ b/qdl.c
@@ -265,17 +265,23 @@ static int usb_open(struct qdl_device *qdl)
 		dev = udev_device_new_from_syspath(udev, path);
 		dev_node = udev_device_get_devnode(dev);
 
-		if (!dev_node)
+		if (!dev_node) {
+			udev_device_unref(dev);
 			continue;
+		}
 
 		fd = open(dev_node, O_RDWR);
-		if (fd < 0)
+		if (fd < 0) {
+			udev_device_unref(dev);
 			continue;
+		}
 
 		ret = parse_usb_desc(fd, qdl, &intf);
 		if (!ret)
 			goto found;
 
+		udev_device_unref(dev);
+
 		close(fd);
 	}
 
@@ -297,19 +303,25 @@ static int usb_open(struct qdl_device *qdl)
 		dev = udev_monitor_receive_device(mon);
 		dev_node = udev_device_get_devnode(dev);
 
-		if (!dev_node)
+		if (!dev_node) {
+			udev_device_unref(dev);
 			continue;
+		}
 
 		printf("%s\n", dev_node);
 
 		fd = open(dev_node, O_RDWR);
-		if (fd < 0)
+		if (fd < 0) {
+			udev_device_unref(dev);
 			continue;
+		}
 
 		ret = parse_usb_desc(fd, qdl, &intf);
 		if (!ret)
 			goto found;
 
+		udev_device_unref(dev);
+
 		close(fd);
 	}
 
@@ -323,6 +335,7 @@ static int usb_open(struct qdl_device *qdl)
 	udev_enumerate_unref(enumerate);
 	udev_monitor_unref(mon);
 	udev_unref(udev);
+	udev_device_unref(dev);
 
 	cmd.ifno = intf;
 	cmd.ioctl_code = USBDEVFS_DISCONNECT;
@@ -464,6 +477,8 @@ int main(int argc, char **argv)
 
 	prog_mbn = argv[optind++];
 
+	xmlInitParser();
+
 	do {
 		type = detect_type(argv[optind]);
 		if (type < 0 || type == QDL_FILE_UNKNOWN)
@@ -503,5 +518,10 @@ int main(int argc, char **argv)
 	if (ret < 0)
 		return 1;
 
+	ufs_unload();
+	program_unload();
+	patch_unload();
+	xmlCleanupParser();
+
 	return 0;
 }
diff --git a/sahara.c b/sahara.c
index 1e0234a..627fd02 100644
--- a/sahara.c
+++ b/sahara.c
@@ -196,8 +196,8 @@ static int sahara_done(struct qdl_device *qdl, struct sahara_pkt *pkt)
 
 int sahara_run(struct qdl_device *qdl, char *prog_mbn)
 {
-	struct sahara_pkt *pkt;
-	char buf[4096];
+	struct sahara_pkt *pkt = NULL;
+	char buf[4096] = {0};
 	char tmp[32];
 	bool done = false;
 	int n;
diff --git a/ufs.c b/ufs.c
index a65a9fb..2fe1336 100644
--- a/ufs.c
+++ b/ufs.c
@@ -305,3 +305,22 @@ int ufs_provisioning_execute(struct qdl_device *qdl,
 	}
 	return apply_ufs_epilogue(qdl, ufs_epilogue_p, true);
 }
+
+void ufs_unload(void)
+{
+	struct ufs_body *body;
+
+	ufs_body_last = NULL;
+
+	for (body = ufs_body_p; body; body = body->next) {
+		if (body->desc)
+			xmlFree(body->desc);
+
+		if (ufs_body_last)
+			free(ufs_body_last);
+		
+		ufs_body_last = body;
+	}
+
+	free(ufs_body_last);
+}
\ No newline at end of file
diff --git a/util.c b/util.c
index 0d3721d..843ad74 100644
--- a/util.c
+++ b/util.c
@@ -84,28 +84,35 @@ void print_hex_dump(const char *prefix, const void *buf, size_t len)
 unsigned int attr_as_unsigned(xmlNode *node, const char *attr, int *errors)
 {
 	xmlChar *value;
+	unsigned int ret;
 
-	value = xmlGetProp(node, (xmlChar*)attr);
+	value = xmlGetProp(node, (xmlChar *) attr);
 	if (!value) {
 		(*errors)++;
 		return 0;
 	}
 
-	return (unsigned int) strtoul((char*)value, NULL, 10);
+	ret = (unsigned int) strtoul((const char*)value, NULL, 10);
+
+	xmlFree(value);
+
+	return ret;
 }
 
 xmlChar *attr_as_string(xmlNode *node, const char *attr, int *errors)
 {
 	xmlChar *value;
 
-	value = xmlGetProp(node, (xmlChar*)attr);
+	value = xmlGetProp(node, (xmlChar *) attr);
 	if (!value) {
 		(*errors)++;
 		return NULL;
 	}
 
-	if (value[0] == '\0')
+	if (value[0] == '\0') {
+		xmlFree(value);
 		return NULL;
+	}
 
-	return strdup((char*)value);
+	return value;
 }