[PATCH]

Sam Ravnborg
2010-08-14T12:43:31Z

From 705dbd8a31520722bda78e1bc731e2880f8df0ff Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Sat, 14 Aug 2010 14:40:00 +0200
Subject: [PATCH] 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 <sam@ravnborg.org>
---
scripts/kconfig/symbol.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index e95718f..943712c 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)) {
--
1.6.0.6