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authorDenis V. Lunev <den@openvz.org>2007-11-10 22:12:03 -0800
committerDavid S. Miller <davem@davemloft.net>2007-11-10 22:12:03 -0800
commit2994c63863ac350c4c8c6a65d8110749c2abb95c (patch)
tree5509f71222641098683df1b1e0ff7bdfc2758b2c /net/core/fib_rules.c
parent33d36bb83c5b566c98a441e791736e25dbc35fc3 (diff)
downloadlinux-2.6.38-lt-ux500-2994c63863ac350c4c8c6a65d8110749c2abb95c.tar.gz
[INET]: Small possible memory leak in FIB rules
This patch fixes a small memory leak. Default fib rules can be deleted by the user if the rule does not carry FIB_RULE_PERMANENT flag, f.e. by ip rule flush Such a rule will not be freed as the ref-counter has 2 on start and becomes clearly unreachable after removal. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/fib_rules.c')
-rw-r--r--net/core/fib_rules.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 13de6f53f09..848132b6cb7 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -18,6 +18,28 @@
static LIST_HEAD(rules_ops);
static DEFINE_SPINLOCK(rules_mod_lock);
+int fib_default_rule_add(struct fib_rules_ops *ops,
+ u32 pref, u32 table, u32 flags)
+{
+ struct fib_rule *r;
+
+ r = kzalloc(ops->rule_size, GFP_KERNEL);
+ if (r == NULL)
+ return -ENOMEM;
+
+ atomic_set(&r->refcnt, 1);
+ r->action = FR_ACT_TO_TBL;
+ r->pref = pref;
+ r->table = table;
+ r->flags = flags;
+
+ /* The lock is not required here, the list in unreacheable
+ * at the moment this function is called */
+ list_add_tail(&r->list, &ops->rules_list);
+ return 0;
+}
+EXPORT_SYMBOL(fib_default_rule_add);
+
static void notify_rule_change(int event, struct fib_rule *rule,
struct fib_rules_ops *ops, struct nlmsghdr *nlh,
u32 pid);