From 112fbe00a4e7fe23b7314485304df7a9b029fda6 Mon Sep 17 00:00:00 2001
From: Lukas Fleischer <calcurse@cryptocrack.de>
Date: Mon, 18 Apr 2011 01:18:03 +0200
Subject: llist.c: Nullify pointers after free()'ing.
* Set all data members to "NULL" in llist_free_inner() after freeing
them. Altough we normally shouldn't continue working with a list that
already went through llist_free_inner(), this will protect against
dangling pointer bugs in case anyone will ever come up with the idea
of doing so.
* Set list head to "NULL" in llist_free(), basically to put the list
into an initialized state.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
---
src/llist.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
(limited to 'src')
diff --git a/src/llist.c b/src/llist.c
index 021de82..e24f9fc 100644
--- a/src/llist.c
+++ b/src/llist.c
@@ -52,6 +52,8 @@ llist_free (llist_t *l)
t = i->next;
mem_free (i);
}
+
+ l->head = NULL;
}
void
@@ -62,7 +64,10 @@ llist_free_inner (llist_t *l, llist_fn_free_t fn_free)
for (i = l->head; i; i = i->next)
{
if (i->data)
- fn_free(i->data);
+ {
+ fn_free(i->data);
+ i->data = NULL;
+ }
}
}
--
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