kconfig: Don't leak choice names during parsing

masahir0y · masahir0y · commit bf0bbdcf1003 · 2018-03-02T09:20:55.000+09:00
The named choice is not used in the kernel tree, but if it were used, it would not be freed. The intention of the named choice can be seen in the log of commit 5a1aa8a ("kconfig: add named choice group"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
@@ -276,6 +276,7 @@ choice: T_CHOICE word_opt T_EOL
 	sym->flags |= SYMBOL_AUTO;
 	menu_add_entry(sym);
 	menu_add_expr(P_CHOICE, NULL, NULL);
+	free($2);
 	printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
 };
 
