fix AUDIT_FILTER_PREPEND handling

Clear AUDIT_FILTER_PREPEND flag after adding rule to list. This fixes three problems when a rule is added with the -A syntax:

- auditctl displays filter list as "(null)"
- the rule cannot be removed using -d
- a duplicate rule can be added with -a

---

 kernel/auditfilter.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

6695e89ba4cf4940682769a2f3cc217564754c1f

index ff85fee..1c47df1 100644
@@ -1012,6 +1012,7 @@ static inline int audit_add_rule(struct 
 
 	if (entry->rule.flags & AUDIT_FILTER_PREPEND) {
 		list_add_rcu(&entry->list, list);
+		entry->rule.flags &= ~AUDIT_FILTER_PREPEND;
 	} else {
 		list_add_tail_rcu(&entry->list, list);
 	}

1.3.0