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| author | Arnaud Lacombe <lacombar@gmail.com> | 2010-09-26 16:22:03 -0400 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2010-10-04 15:13:13 +0200 |
| commit | ff5ff6060bf880aac233e68dd666cbe9e39ec620 (patch) | |
| tree | 1798820aabeb29694ba46eed2a3516457ce57b5a | |
| parent | 8558f59edf935cf5ee5ffc29a9e9458fd9a71be1 (diff) | |
| download | linux-ff5ff6060bf880aac233e68dd666cbe9e39ec620.tar.gz linux-ff5ff6060bf880aac233e68dd666cbe9e39ec620.tar.bz2 linux-ff5ff6060bf880aac233e68dd666cbe9e39ec620.zip | |
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 <lacombar@gmail.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
| -rw-r--r-- | scripts/kconfig/expr.h | 1 | ||||
| -rw-r--r-- | 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) && |