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>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index e95718fe..943712c 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -937,6 +937,8 @@
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)) {