text-input/input-method: handle strdup() failure

types/wlr_input_method_v2.c

@@ -88,6 +88,10 @@ static void im_commit_string(struct wl_client *client,
 	}
 	free(input_method->pending.commit_text);
 	input_method->pending.commit_text = strdup(text);
+	if (input_method->pending.commit_text == NULL) {
+		wl_client_post_no_memory(client);
+		return;
+	}
 }
 
 static void im_set_preedit_string(struct wl_client *client,
@@ -102,6 +106,10 @@ static void im_set_preedit_string(struct wl_client *client,
 	input_method->pending.preedit.cursor_end = cursor_end;
 	free(input_method->pending.preedit.text);
 	input_method->pending.preedit.text = strdup(text);
+	if (input_method->pending.preedit.text == NULL) {
+		wl_client_post_no_memory(client);
+		return;
+	}
 }
 
 static void im_delete_surrounding_text(struct wl_client *client,

types/wlr_text_input_v3.c

@@ -171,6 +171,10 @@ static void text_input_commit(struct wl_client *client,
 	if (text_input->pending.surrounding.text) {
 		text_input->current.surrounding.text =
 			strdup(text_input->pending.surrounding.text);
+		if (text_input->current.surrounding.text == NULL) {
+			wl_client_post_no_memory(client);
+			return;
+		}
 	}
 
 	bool old_enabled = text_input->current_enabled;