Dirk Gouders e983b7b17a kconfig/menu.c: fix multiple references to expressions in menu_add_prop() ... menu_add_prop() applies upper menus' visibilities to actual prompts by AND-ing the prompts visibilities with the upper menus ones. This creates a further reference to the menu's visibilities and when the expression reduction functions do their work, they may remove or modify expressions that have multiple references, thus causing unpredictable side-effects. The following example Kconfig constructs a case where this causes problems: a menu and a prompt which's visibilities depend on the same symbol. When invoking mconf with this Kconfig and pressing "Z" we see a problem caused by a free'd expression still referenced by the menu's visibility: ------------------------------------------------------------------------ mainmenu "Kconfig Testing Configuration" config VISIBLE def_bool n config Placeholder bool "Place holder" menu "Invisible" visible if VISIBLE config TEST_VAR bool "Test option" if VISIBLE endmenu ------------------------------------------------------------------------ This patch fixes this problem by creating copies of the menu's visibility expressions before AND-ing them with the prompt's one. Signed-off-by: Dirk Gouders <dirk@gouders.net> [yann.morin.1998@free.fr: move variable into its block-scope, keep lines <80 chars, typo] Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>		2013-05-30 00:14:01 +02:00
..
lxdialog
.gitignore
check.sh
conf.c
confdata.c
expr.c
expr.h
gconf.c
gconf.glade
images.c
kxgettext.c
list.h
lkc_proto.h
lkc.h
Makefile
mconf.c
menu.c
merge_config.sh
nconf.c
nconf.gui.c
nconf.h
POTFILES.in
qconf.cc
qconf.h
streamline_config.pl
symbol.c
util.c
zconf.gperf
zconf.hash.c_shipped
zconf.l
zconf.lex.c_shipped
zconf.tab.c_shipped
zconf.y