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(-) 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(+) 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(-) 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