From 84062dd3a6a045395a43de1d9adc9b8eb2d1426e Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Sat, 14 Aug 2010 23:22:16 +0200 Subject: kconfig: fix savedefconfig with choice marked optional savedefconfig failed to save the correct minimal config when it encountered a choice marked optional. Consider following minimal configuration: $cat Kconfig choice prompt "choice" optional config A bool "a" config B bool "b" endchoice $cat .config | grep -v ^# CONFIG_A=y $conf --savedefconfig=defconfig Kconfig would before this fix result in an empty file, because kconfig would assume that CONFIG_A=y is a default value. But because the choice is optional the default is that both A and B are =n. Fix so we handle optional choices correct. Signed-off-by: Sam Ravnborg Signed-off-by: Michal Marek --- scripts/kconfig/confdata.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c index c39327e60ea4..515253fe46cf 100644 --- a/scripts/kconfig/confdata.c +++ b/scripts/kconfig/confdata.c @@ -497,7 +497,9 @@ int conf_write_defconfig(const char *filename) /* * If symbol is a choice value and equals to the * default for a choice - skip. - * But only if value is bool and equal to "y" . + * But only if value is bool and equal to "y" and + * choice is not "optional". + * (If choice is "optional" then all values can be "n") */ if (sym_is_choice_value(sym)) { struct symbol *cs; @@ -505,7 +507,7 @@ int conf_write_defconfig(const char *filename) cs = prop_get_symbol(sym_get_choice_prop(sym)); ds = sym_choice_default(cs); - if (sym == ds) { + if (!sym_is_optional(cs) && sym == ds) { if ((sym->type == S_BOOLEAN) && sym_get_tristate_value(sym) == yes) goto next_menu; -- cgit v1.2.3 From 3643f849d7da5c12da589beb03c12303fe79b841 Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Sat, 14 Aug 2010 14:40:00 +0200 Subject: kconfig: fix segfault when detecting recursive dependency Following sample Kconfig generated a segfault: config FOO bool select PERF_EVENTS if HAVE_HW_BREAKPOINT config PERF_EVENTS bool config HAVE_HW_BREAKPOINT bool depends on PERF_EVENTS Fix by reverting back to a valid property if there was no property on the stack of symbols. The above pattern were seen in sh Kconfig. A fix for the Kconfig file has been sent to the sh folks. Signed-off-by: Sam Ravnborg Signed-off-by: Michal Marek --- scripts/kconfig/symbol.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c index e95718fea355..943712ca6c0a 100644 --- a/scripts/kconfig/symbol.c +++ b/scripts/kconfig/symbol.c @@ -937,6 +937,8 @@ static void sym_check_print_recursive(struct symbol *last_sym) sym = stack->sym; next_sym = stack->next ? stack->next->sym : last_sym; prop = stack->prop; + if (prop == NULL) + prop = stack->sym->prop; /* for choice values find the menu entry (used below) */ if (sym_is_choice(sym) || sym_is_choice_value(sym)) { -- cgit v1.2.3 From ff5ff6060bf880aac233e68dd666cbe9e39ec620 Mon Sep 17 00:00:00 2001 From: Arnaud Lacombe Date: Sun, 26 Sep 2010 16:22:03 -0400 Subject: kconfig: delay symbol direct dependency initialization This fixes the use-after-free and associated crash in kconfig introduced in commit 246cf9c26bf11f2bffbecea6e5bd222eee7b1df8. Signed-off-by: Arnaud Lacombe Acked-by: Catalin Marinas Signed-off-by: Michal Marek --- scripts/kconfig/expr.h | 1 - scripts/kconfig/menu.c | 7 ++----- 2 files changed, 2 insertions(+), 6 deletions(-) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h index 6ee2e4fb1481..170459c224a1 100644 --- a/scripts/kconfig/expr.h +++ b/scripts/kconfig/expr.h @@ -165,7 +165,6 @@ struct menu { struct symbol *sym; struct property *prompt; struct expr *dep; - struct expr *dir_dep; unsigned int flags; char *help; struct file *file; diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c index 4fb590247f33..edda8b49619d 100644 --- a/scripts/kconfig/menu.c +++ b/scripts/kconfig/menu.c @@ -107,7 +107,6 @@ static struct expr *menu_check_dep(struct expr *e) void menu_add_dep(struct expr *dep) { current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep)); - current_entry->dir_dep = current_entry->dep; } void menu_set_type(int type) @@ -291,10 +290,6 @@ void menu_finalize(struct menu *parent) for (menu = parent->list; menu; menu = menu->next) menu_finalize(menu); } else if (sym) { - /* ignore inherited dependencies for dir_dep */ - sym->dir_dep.expr = expr_transform(expr_copy(parent->dir_dep)); - sym->dir_dep.expr = expr_eliminate_dups(sym->dir_dep.expr); - basedep = parent->prompt ? parent->prompt->visible.expr : NULL; basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no); basedep = expr_eliminate_dups(expr_transform(basedep)); @@ -325,6 +320,8 @@ void menu_finalize(struct menu *parent) parent->next = last_menu->next; last_menu->next = NULL; } + + sym->dir_dep.expr = parent->dep; } for (menu = parent->list; menu; menu = menu->next) { if (sym && sym_is_choice(sym) && -- cgit v1.2.3 From 71ebc01d3ad4fa3f20e86603bc31ff2cbc535d95 Mon Sep 17 00:00:00 2001 From: Michal Marek Date: Fri, 8 Oct 2010 16:40:27 +0200 Subject: kconfig: Temporarily disable dependency warnings After fixing a use-after-free bug in kconfig, a 'make defconfig' or 'make allmodconfig' fills the screen with warnings that were not detected before. Given that we are close to the release now, disable the warnings temporarily and deal with them after 2.6.36. Signed-off-by: Michal Marek --- scripts/kconfig/symbol.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c index 943712ca6c0a..1f8b305449db 100644 --- a/scripts/kconfig/symbol.c +++ b/scripts/kconfig/symbol.c @@ -350,6 +350,7 @@ void sym_calc_value(struct symbol *sym) } } calc_newval: +#if 0 if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) { fprintf(stderr, "warning: ("); expr_fprint(sym->rev_dep.expr, stderr); @@ -358,6 +359,7 @@ void sym_calc_value(struct symbol *sym) expr_fprint(sym->dir_dep.expr, stderr); fprintf(stderr, ")\n"); } +#endif newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri); } if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN) -- cgit v1.2.3 From e9203c988234aa512bd45ca32b52e21c7bbfc414 Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Wed, 1 Sep 2010 11:21:30 -0400 Subject: kbuild: fix oldnoconfig to do the right thing Commit 861b4ea4 broke oldnoconfig when removed the oldnoconfig checks on if (input_mode == nonint_oldconfig || input_mode == oldnoconfig) { if (input_mode == nonint_oldconfig && sym->name && !sym_is_choice_value(sym)) { to avoid oldnoconfig chugging through the else stanza. Fix that to restore expected behaviour (which I've confirmed in the Fedora kernel build that the configs end up looking the same.) Signed-off-by: Kyle McMartin Acked-by: Sam Ravnborg Signed-off-by: Michal Marek --- scripts/kconfig/conf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c index 5b7c86ea43a1..7ef429cd5cb3 100644 --- a/scripts/kconfig/conf.c +++ b/scripts/kconfig/conf.c @@ -427,7 +427,7 @@ static void check_conf(struct menu *menu) if (sym->name && !sym_is_choice_value(sym)) { printf("CONFIG_%s\n", sym->name); } - } else { + } else if (input_mode != oldnoconfig) { if (!conf_cnt++) printf(_("*\n* Restart config...\n*\n")); rootEntry = menu_get_parent_menu(menu); -- cgit v1.2.3