[PATCH 7/9] menu: fix memory corruption

[Sascha Hauer]

menu_free and menu_entry_free are called on not fully initialized
entries, so we have to check for validity before freeing the
members.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 common/menu.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/common/menu.c b/common/menu.c
index 6e6637a..294e372 100644
--- a/common/menu.c
+++ b/common/menu.c
@@ -46,8 +46,10 @@ void menu_free(struct menu *m)
 
 	if (!m)
 		return;
-	free(m->name);
-	free(m->display);
+	if (m->name)
+		free(m->name);
+	if (m->display)
+		free(m->display);
 
 	list_for_each_entry_safe(me, tmp, &m->entries, list)
 		menu_entry_free(me);
@@ -143,7 +145,9 @@ void menu_entry_free(struct menu_entry *me)
 	if (!me)
 		return;
 
-	free(me->display);
+	if (me->display)
+		free(me->display);
+
 	free(me);
 }
 
-- 
1.7.1