Merge pull request #383 from emersion/wl-resource-create-checks

Add checks for wl_resource_create

types/wlr_compositor.c

@@ -13,10 +13,21 @@ static void destroy_surface_listener(struct wl_listener *listener, void *data) {
 static void wl_compositor_create_surface(struct wl_client *client,
 		struct wl_resource *resource, uint32_t id) {
 	struct wlr_compositor *compositor = wl_resource_get_user_data(resource);
+
 	struct wl_resource *surface_resource = wl_resource_create(client,
-			&wl_surface_interface, wl_resource_get_version(resource), id);
+		&wl_surface_interface, wl_resource_get_version(resource), id);
+	if (surface_resource == NULL) {
+		wl_resource_post_no_memory(resource);
+		return;
+	}
+
 	struct wlr_surface *surface = wlr_surface_create(surface_resource,
-			compositor->renderer);
+		compositor->renderer);
+	if (surface == NULL) {
+		wl_resource_destroy(surface_resource);
+		wl_resource_post_no_memory(resource);
+		return;
+	}
 	surface->compositor_data = compositor;
 	surface->compositor_listener.notify = &destroy_surface_listener;
 	wl_resource_add_destroy_listener(surface_resource,
@@ -49,13 +60,17 @@ static void wl_compositor_destroy(struct wl_resource *resource) {
 	}
 }
 
-static void wl_compositor_bind(struct wl_client *wl_client, void *_compositor,
+static void wl_compositor_bind(struct wl_client *wl_client, void *data,
 		uint32_t version, uint32_t id) {
-	struct wlr_compositor *compositor = _compositor;
+	struct wlr_compositor *compositor = data;
 	assert(wl_client && compositor);
 
 	struct wl_resource *wl_resource =
 		wl_resource_create(wl_client, &wl_compositor_interface, version, id);
+	if (wl_resource == NULL) {
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
 	wl_resource_set_implementation(wl_resource, &wl_compositor_impl,
 		compositor, wl_compositor_destroy);
 	wl_list_insert(&compositor->wl_resources,

types/wlr_data_device.c

@@ -233,6 +233,9 @@ static struct wlr_data_offer *wlr_data_source_send_offer(
 		struct wlr_data_source *source,
 		struct wl_resource *target) {
 	struct wlr_data_offer *offer = calloc(1, sizeof(struct wlr_data_offer));
+	if (offer == NULL) {
+		return NULL;
+	}
 
 	offer->resource =
 		wl_resource_create(wl_resource_get_client(target),
@@ -781,18 +784,16 @@ data_device_manager_impl = {
 
 static void data_device_manager_bind(struct wl_client *client,
 		void *data, uint32_t version, uint32_t id) {
-	struct wl_resource *resource;
+	struct wl_resource *resource = wl_resource_create(client,
-
+		&wl_data_device_manager_interface,
-	resource = wl_resource_create(client,
+		version, id);
-			&wl_data_device_manager_interface,
-			version, id);
 	if (resource == NULL) {
 		wl_client_post_no_memory(client);
 		return;
 	}
 
-	wl_resource_set_implementation(resource,
+	wl_resource_set_implementation(resource, &data_device_manager_impl,
-			&data_device_manager_impl, NULL, NULL);
+		NULL, NULL);
 }
 
 struct wlr_data_device_manager *wlr_data_device_manager_create(
@@ -807,7 +808,6 @@ struct wlr_data_device_manager *wlr_data_device_manager_create(
 	manager->global =
 		wl_global_create(display, &wl_data_device_manager_interface,
 			3, NULL, data_device_manager_bind);
-
 	if (!manager->global) {
 		wlr_log(L_ERROR, "could not create data device manager wl global");
 		free(manager);

types/wlr_gamma_control.c

@@ -83,8 +83,8 @@ static void gamma_control_manager_get_gamma_control(struct wl_client *client,
 	gamma_control->resource = wl_resource_create(client,
 		&gamma_control_interface, version, id);
 	if (gamma_control->resource == NULL) {
-		wl_client_post_no_memory(client);
 		free(gamma_control);
+		wl_client_post_no_memory(client);
 		return;
 	}
 	wlr_log(L_DEBUG, "new gamma_control %p (res %p)", gamma_control,
@@ -109,10 +109,9 @@ static struct gamma_control_manager_interface gamma_control_manager_impl = {
 	.get_gamma_control = gamma_control_manager_get_gamma_control,
 };
 
-static void gamma_control_manager_bind(struct wl_client *client,
+static void gamma_control_manager_bind(struct wl_client *client, void *data,
-		void *_gamma_control_manager, uint32_t version, uint32_t id) {
+		uint32_t version, uint32_t id) {
-	struct wlr_gamma_control_manager *gamma_control_manager =
+	struct wlr_gamma_control_manager *gamma_control_manager = data;
-		_gamma_control_manager;
 	assert(client && gamma_control_manager);
 
 	struct wl_resource *resource = wl_resource_create(client,

types/wlr_output.c

@@ -91,13 +91,17 @@ static struct wl_output_interface wl_output_impl = {
 	.release = wl_output_release
 };
 
-static void wl_output_bind(struct wl_client *wl_client, void *_wlr_output,
+static void wl_output_bind(struct wl_client *wl_client, void *data,
 		uint32_t version, uint32_t id) {
-	struct wlr_output *wlr_output = _wlr_output;
+	struct wlr_output *wlr_output = data;
 	assert(wl_client && wlr_output);
 
 	struct wl_resource *wl_resource = wl_resource_create(wl_client,
 		&wl_output_interface, version, id);
+	if (wl_resource == NULL) {
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
 	wl_resource_set_implementation(wl_resource, &wl_output_impl, wlr_output,
 		wl_output_destroy);
 	wl_list_insert(&wlr_output->wl_resources,

types/wlr_screenshooter.c

@@ -51,16 +51,17 @@ static void output_frame_notify(struct wl_listener *listener, void *_data) {
 }
 
 static void screenshooter_shoot(struct wl_client *client,
-		struct wl_resource *_screenshooter, uint32_t id,
+		struct wl_resource *screenshooter_resource, uint32_t id,
-		struct wl_resource *_output, struct wl_resource *_buffer) {
+		struct wl_resource *output_resource,
+		struct wl_resource *buffer_resource) {
 	struct wlr_screenshooter *screenshooter =
-		wl_resource_get_user_data(_screenshooter);
+		wl_resource_get_user_data(screenshooter_resource);
-	struct wlr_output *output = wl_resource_get_user_data(_output);
+	struct wlr_output *output = wl_resource_get_user_data(output_resource);
-	if (!wl_shm_buffer_get(_buffer)) {
+	if (!wl_shm_buffer_get(buffer_resource)) {
 		wlr_log(L_ERROR, "Invalid buffer: not a shared memory buffer");
 		return;
 	}
-	struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get(_buffer);
+	struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get(buffer_resource);
 	int32_t width = wl_shm_buffer_get_width(shm_buffer);
 	int32_t height = wl_shm_buffer_get_height(shm_buffer);
 	int32_t stride = wl_shm_buffer_get_stride(shm_buffer);
@@ -84,23 +85,31 @@ static void screenshooter_shoot(struct wl_client *client,
 	struct wlr_screenshot *screenshot =
 		calloc(1, sizeof(struct wlr_screenshot));
 	if (!screenshot) {
-		wl_client_post_no_memory(client);
+		wl_resource_post_no_memory(screenshooter_resource);
 		return;
 	}
-	screenshot->output_resource = _output;
+	screenshot->output_resource = output_resource;
 	screenshot->output = output;
 	screenshot->screenshooter = screenshooter;
 	screenshot->resource = wl_resource_create(client,
-		&orbital_screenshot_interface, wl_resource_get_version(_screenshooter),
+		&orbital_screenshot_interface,
-		id);
+		wl_resource_get_version(screenshooter_resource), id);
-	wlr_log(L_DEBUG, "new screenshot %p (res %p)", screenshot,
+	if (screenshot->resource == NULL) {
-		screenshot->resource);
+		free(screenshot);
+		wl_resource_post_no_memory(screenshooter_resource);
+		return;
+	}
 	wl_resource_set_implementation(screenshot->resource, NULL, screenshot,
 		NULL);
 
+	wlr_log(L_DEBUG, "new screenshot %p (res %p)", screenshot,
+		screenshot->resource);
+
 	struct screenshot_state *state = calloc(1, sizeof(struct screenshot_state));
 	if (!state) {
-		wl_client_post_no_memory(client);
+		wl_resource_destroy(screenshot->resource);
+		free(screenshot);
+		wl_resource_post_no_memory(screenshooter_resource);
 		return;
 	}
 	state->width = width;
@@ -117,13 +126,17 @@ static struct orbital_screenshooter_interface screenshooter_impl = {
 	.shoot = screenshooter_shoot,
 };
 
-static void screenshooter_bind(struct wl_client *wl_client,
+static void screenshooter_bind(struct wl_client *wl_client, void *data,
-		void *_screenshooter, uint32_t version, uint32_t id) {
+		uint32_t version, uint32_t id) {
-	struct wlr_screenshooter *screenshooter = _screenshooter;
+	struct wlr_screenshooter *screenshooter = data;
 	assert(wl_client && screenshooter);
 
 	struct wl_resource *wl_resource = wl_resource_create(wl_client,
 		&orbital_screenshooter_interface, version, id);
+	if (wl_resource == NULL) {
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
 	wl_resource_set_implementation(wl_resource, &screenshooter_impl,
 		screenshooter, NULL);
 }
@@ -137,13 +150,12 @@ struct wlr_screenshooter *wlr_screenshooter_create(struct wl_display *display,
 	}
 	screenshooter->renderer = renderer;
 
-	struct wl_global *wl_global = wl_global_create(display,
+	screenshooter->wl_global = wl_global_create(display,
 		&orbital_screenshooter_interface, 1, screenshooter, screenshooter_bind);
-	if (!wl_global) {
+	if (screenshooter->wl_global == NULL) {
 		free(screenshooter);
 		return NULL;
 	}
-	screenshooter->wl_global = wl_global;
 
 	return screenshooter;
 }

types/wlr_seat.c

@@ -65,9 +65,9 @@ static void wl_pointer_destroy(struct wl_resource *resource) {
 }
 
 static void wl_seat_get_pointer(struct wl_client *client,
-		struct wl_resource *pointer_resource, uint32_t id) {
+		struct wl_resource *seat_resource, uint32_t id) {
 	struct wlr_seat_client *seat_client =
-		wl_resource_get_user_data(pointer_resource);
+		wl_resource_get_user_data(seat_resource);
 	if (!(seat_client->seat->capabilities & WL_SEAT_CAPABILITY_POINTER)) {
 		return;
 	}
@@ -78,7 +78,11 @@ static void wl_seat_get_pointer(struct wl_client *client,
 		wl_resource_destroy(seat_client->pointer);
 	}
 	seat_client->pointer = wl_resource_create(client, &wl_pointer_interface,
-		wl_resource_get_version(pointer_resource), id);
+		wl_resource_get_version(seat_resource), id);
+	if (seat_client->pointer == NULL) {
+		wl_resource_post_no_memory(seat_resource);
+		return;
+	}
 	wl_resource_set_implementation(seat_client->pointer, &wl_pointer_impl,
 		seat_client, &wl_pointer_destroy);
 }
@@ -126,6 +130,10 @@ static void wl_seat_get_keyboard(struct wl_client *client,
 	}
 	seat_client->keyboard = wl_resource_create(client, &wl_keyboard_interface,
 		wl_resource_get_version(seat_resource), id);
+	if (seat_client->keyboard == NULL) {
+		wl_resource_post_no_memory(seat_resource);
+		return;
+	}
 	wl_resource_set_implementation(seat_client->keyboard, &wl_keyboard_impl,
 		seat_client, &wl_keyboard_destroy);
 
@@ -162,6 +170,10 @@ static void wl_seat_get_touch(struct wl_client *client,
 	}
 	seat_client->touch = wl_resource_create(client, &wl_touch_interface,
 		wl_resource_get_version(seat_resource), id);
+	if (seat_client->touch == NULL) {
+		wl_resource_post_no_memory(seat_resource);
+		return;
+	}
 	wl_resource_set_implementation(seat_client->touch, &wl_touch_impl,
 		seat_client, &wl_touch_destroy);
 }
@@ -213,6 +225,11 @@ static void wl_seat_bind(struct wl_client *client, void *_wlr_seat,
 	}
 	seat_client->wl_resource =
 		wl_resource_create(client, &wl_seat_interface, version, id);
+	if (seat_client->wl_resource == NULL) {
+		free(seat_client);
+		wl_client_post_no_memory(client);
+		return;
+	}
 	seat_client->client = client;
 	seat_client->seat = wlr_seat;
 	wl_resource_set_implementation(seat_client->wl_resource, &wl_seat_impl,

types/wlr_server_decoration.c

@@ -73,8 +73,8 @@ static void server_decoration_manager_handle_create(struct wl_client *client,
 	decoration->resource = wl_resource_create(client,
 		&org_kde_kwin_server_decoration_interface, version, id);
 	if (decoration->resource == NULL) {
-		wl_client_post_no_memory(client);
 		free(decoration);
+		wl_client_post_no_memory(client);
 		return;
 	}
 	wl_resource_set_implementation(decoration->resource,
@@ -120,9 +120,9 @@ void server_decoration_manager_destroy_resource(struct wl_resource *resource) {
 	wl_list_remove(wl_resource_get_link(resource));
 }
 
-static void server_decoration_manager_bind(struct wl_client *client,
+static void server_decoration_manager_bind(struct wl_client *client, void *data,
-		void *_manager, uint32_t version, uint32_t id) {
+		uint32_t version, uint32_t id) {
-	struct wlr_server_decoration_manager *manager = _manager;
+	struct wlr_server_decoration_manager *manager = data;
 	assert(client && manager);
 
 	struct wl_resource *resource = wl_resource_create(client,

types/wlr_surface.c

@@ -819,14 +819,21 @@ static void subsurface_handle_parent_destroy(struct wl_listener *listener,
 
 void wlr_surface_make_subsurface(struct wlr_surface *surface,
 		struct wlr_surface *parent, uint32_t id) {
+	struct wl_client *client = wl_resource_get_client(surface->resource);
 	assert(surface->subsurface == NULL);
 
 	struct wlr_subsurface *subsurface =
 		calloc(1, sizeof(struct wlr_subsurface));
 	if (!subsurface) {
+		wl_client_post_no_memory(client);
 		return;
 	}
 	subsurface->cached = wlr_surface_state_create();
+	if (subsurface->cached == NULL) {
+		free(subsurface);
+		wl_client_post_no_memory(client);
+		return;
+	}
 	subsurface->synchronized = true;
 	subsurface->surface = surface;
 
@@ -840,10 +847,14 @@ void wlr_surface_make_subsurface(struct wlr_surface *surface,
 	wl_list_insert(&parent->subsurface_pending_list,
 		&subsurface->parent_pending_link);
 
-	struct wl_client *client = wl_resource_get_client(surface->resource);
-
 	subsurface->resource =
 		wl_resource_create(client, &wl_subsurface_interface, 1, id);
+	if (subsurface->resource == NULL) {
+		wlr_surface_state_destroy(subsurface->cached);
+		free(subsurface);
+		wl_client_post_no_memory(client);
+		return;
+	}
 
 	wl_resource_set_implementation(subsurface->resource,
 		&subsurface_implementation, subsurface,

types/wlr_wl_shell.c

@@ -506,19 +506,19 @@ static int shell_surface_ping_timeout(void *user_data) {
 }
 
 static void shell_protocol_get_shell_surface(struct wl_client *client,
-		struct wl_resource *resource, uint32_t id,
+		struct wl_resource *shell_resource, uint32_t id,
 		struct wl_resource *surface_resource) {
 	struct wlr_surface *surface = wl_resource_get_user_data(surface_resource);
 	if (wlr_surface_set_role(surface, wlr_wl_shell_surface_role,
-			resource, WL_SHELL_ERROR_ROLE)) {
+			shell_resource, WL_SHELL_ERROR_ROLE)) {
 		return;
 	}
 
-	struct wlr_wl_shell *wl_shell = wl_resource_get_user_data(resource);
+	struct wlr_wl_shell *wl_shell = wl_resource_get_user_data(shell_resource);
 	struct wlr_wl_shell_surface *wl_surface =
 		calloc(1, sizeof(struct wlr_wl_shell_surface));
 	if (wl_surface == NULL) {
-		wl_client_post_no_memory(client);
+		wl_resource_post_no_memory(shell_resource);
 		return;
 	}
 	wl_list_init(&wl_surface->grab_link);
@@ -530,13 +530,20 @@ static void shell_protocol_get_shell_surface(struct wl_client *client,
 	wl_surface->surface = surface;
 
 	wl_surface->resource = wl_resource_create(client,
-		&wl_shell_surface_interface, wl_resource_get_version(resource), id);
+		&wl_shell_surface_interface, wl_resource_get_version(shell_resource),
-	wlr_log(L_DEBUG, "new wl_shell %p (res %p)", wl_surface,
+		id);
-		wl_surface->resource);
+	if (wl_surface->resource == NULL) {
+		free(wl_surface);
+		wl_resource_post_no_memory(shell_resource);
+		return;
+	}
 	wl_resource_set_implementation(wl_surface->resource,
 		&shell_surface_impl, wl_surface,
 		shell_surface_resource_destroy);
 
+	wlr_log(L_DEBUG, "new wl_shell %p (res %p)", wl_surface,
+		wl_surface->resource);
+
 	wl_signal_init(&wl_surface->events.destroy);
 	wl_signal_init(&wl_surface->events.ping_timeout);
 	wl_signal_init(&wl_surface->events.request_move);
@@ -574,13 +581,17 @@ static void shell_destroy(struct wl_resource *resource) {
 	wl_list_remove(wl_resource_get_link(resource));
 }
 
-static void shell_bind(struct wl_client *wl_client, void *_wl_shell,
+static void shell_bind(struct wl_client *wl_client, void *data,
 		uint32_t version, uint32_t id) {
-	struct wlr_wl_shell *wl_shell = _wl_shell;
+	struct wlr_wl_shell *wl_shell = data;
 	assert(wl_client && wl_shell);
 
 	struct wl_resource *wl_resource = wl_resource_create(wl_client,
 		&wl_shell_interface, version, id);
+	if (wl_resource == NULL) {
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
 	wl_resource_set_implementation(wl_resource, &shell_impl, wl_shell,
 		shell_destroy);
 	wl_list_insert(&wl_shell->wl_resources, wl_resource_get_link(wl_resource));

types/wlr_xdg_shell_v6.c

@@ -343,8 +343,8 @@ static void xdg_shell_create_positioner(struct wl_client *wl_client,
 		wl_resource_get_version(resource),
 		id);
 	if (positioner->resource == NULL) {
-		wl_client_post_no_memory(wl_client);
 		free(positioner);
+		wl_client_post_no_memory(wl_client);
 		return;
 	}
 
@@ -480,13 +480,13 @@ static void xdg_surface_get_popup(struct wl_client *client,
 	}
 
 	if (wlr_surface_set_role(surface->surface, wlr_desktop_xdg_popup_role,
-				resource, ZXDG_SHELL_V6_ERROR_ROLE)) {
+			resource, ZXDG_SHELL_V6_ERROR_ROLE)) {
 		return;
 	}
 
 	surface->popup_state = calloc(1, sizeof(struct wlr_xdg_popup_v6));
 	if (!surface->popup_state) {
-		wl_client_post_no_memory(client);
+		wl_resource_post_no_memory(resource);
 		return;
 	}
 
@@ -495,6 +495,7 @@ static void xdg_surface_get_popup(struct wl_client *client,
 			wl_resource_get_version(resource), id);
 	if (surface->popup_state->resource == NULL) {
 		free(surface->popup_state);
+		wl_resource_post_no_memory(resource);
 		return;
 	}
 
@@ -735,7 +736,7 @@ static void xdg_surface_get_toplevel(struct wl_client *client,
 
 	surface->toplevel_state = calloc(1, sizeof(struct wlr_xdg_toplevel_v6));
 	if (surface->toplevel_state == NULL) {
-		wl_client_post_no_memory(client);
+		wl_resource_post_no_memory(resource);
 		return;
 	}
 
@@ -744,6 +745,11 @@ static void xdg_surface_get_toplevel(struct wl_client *client,
 
 	struct wl_resource *toplevel_resource = wl_resource_create(client,
 		&zxdg_toplevel_v6_interface, wl_resource_get_version(resource), id);
+	if (toplevel_resource == NULL) {
+		free(surface->toplevel_state);
+		wl_resource_post_no_memory(resource);
+		return;
+	}
 
 	surface->toplevel_state->resource = toplevel_resource;
 
@@ -1118,9 +1124,20 @@ static void xdg_shell_get_xdg_surface(struct wl_client *wl_client,
 	surface->resource = wl_resource_create(wl_client,
 		&zxdg_surface_v6_interface, wl_resource_get_version(client_resource),
 		id);
+	if (surface->resource == NULL) {
+		free(surface->next_geometry);
+		free(surface->geometry);
+		free(surface);
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
 
 	if (wlr_surface_has_buffer(surface->surface)) {
-		wl_resource_post_error(surface->resource,
+		wl_resource_destroy(surface->resource);
+		free(surface->next_geometry);
+		free(surface->geometry);
+		free(surface);
+		wl_resource_post_error(surface_resource,
 			ZXDG_SURFACE_V6_ERROR_UNCONFIGURED_BUFFER,
 			"xdg_surface must not have a buffer at creation");
 		return;
@@ -1199,9 +1216,9 @@ static int wlr_xdg_client_v6_ping_timeout(void *user_data) {
 	return 1;
 }
 
-static void xdg_shell_bind(struct wl_client *wl_client, void *_xdg_shell,
+static void xdg_shell_bind(struct wl_client *wl_client, void *data,
 		uint32_t version, uint32_t id) {
-	struct wlr_xdg_shell_v6 *xdg_shell = _xdg_shell;
+	struct wlr_xdg_shell_v6 *xdg_shell = data;
 	assert(wl_client && xdg_shell);
 
 	struct wlr_xdg_client_v6 *client =
@@ -1215,6 +1232,11 @@ static void xdg_shell_bind(struct wl_client *wl_client, void *_xdg_shell,
 
 	client->resource =
 		wl_resource_create(wl_client, &zxdg_shell_v6_interface, version, id);
+	if (client->resource == NULL) {
+		free(client);
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
 	client->client = wl_client;
 	client->shell = xdg_shell;