Handle some more memory allocation failures

sway/commands.c

@@ -121,6 +121,9 @@ void input_cmd_apply(struct input_config *input) {
 		for (int i = 0; i < input_devices->length; ++i) {
 			device = input_devices->items[i];
 			char* dev_identifier = libinput_dev_unique_id(device);
+			if (!dev_identifier) {
+				break;
+			}
 			int match = dev_identifier && strcmp(dev_identifier, input->identifier) == 0;
 			free(dev_identifier);
 			if (match) {

sway/extensions.c

@@ -81,6 +81,10 @@ static void set_background(struct wl_client *client, struct wl_resource *resourc
 	}
 	sway_log(L_DEBUG, "Setting surface %p as background for output %d", surface, (int)output);
 	struct background_config *config = malloc(sizeof(struct background_config));
+	if (!config) {
+		sway_log(L_ERROR, "Unable to allocate background config");
+		return;
+	}
 	config->client = client;
 	config->output = output;
 	config->surface = wlc_resource_from_wl_surface_resource(surface);

sway/handlers.c

@@ -123,6 +123,11 @@ static void update_background_geometries(wlc_handle output) {
 
 static bool handle_input_created(struct libinput_device *device) {
 	const char *identifier = libinput_dev_unique_id(device);
+	if (!identifier) {
+		sway_log(L_ERROR, "Unable to allocate unique name for input device %p",
+				device);
+		return true;
+	}
 	sway_log(L_INFO, "Found input device (%s)", identifier);
 
 	list_add(input_devices, device);
@@ -402,6 +407,10 @@ static bool handle_view_created(wlc_handle handle) {
 	} else {
 		swayc_t *output = swayc_parent_by_type(focused, C_OUTPUT);
 		wlc_handle *h = malloc(sizeof(wlc_handle));
+		if (!h) {
+			sway_log(L_ERROR, "Unable to allocate window handle, view handler bailing out");
+			return true;
+		}
 		*h = handle;
 		sway_log(L_DEBUG, "Adding unmanaged window %p to %p", h, output->unmanaged);
 		list_add(output->unmanaged, h);

sway/input.c

@@ -45,6 +45,10 @@ char *libinput_dev_unique_id(struct libinput_device *device) {
 
 	int len = strlen(name) + sizeof(char) * 6;
 	char *identifier = malloc(len);
+	if (!identifier) {
+		sway_log(L_ERROR, "Unable to allocate unique input device name");
+		return NULL;
+	}
 
 	const char *fmt = "%d:%d:%s";
 	snprintf(identifier, len, fmt, vendor, product, name); 

sway/ipc-server.c

@@ -414,7 +414,11 @@ void ipc_client_handle_command(struct ipc_client *client) {
 				struct libinput_device *device = input_devices->items[i];
 				char* identifier = libinput_dev_unique_id(device);
 				json_object *device_object = json_object_new_object();
-				json_object_object_add(device_object, "identifier", json_object_new_string(identifier));
+				if (!identifier) {
+					json_object_object_add(device_object, "identifier", NULL);
+				} else {
+					json_object_object_add(device_object, "identifier", json_object_new_string(identifier));
+				}
 				json_object_array_add(inputs, device_object);
 				free(identifier);
 			}