All lists in the tree_nodes_free() have both zero count and true dead flag.
Because lists are selected by nf_conncount_gc_list() and that makes that
zero-count and true dead flag.
So that the if statement of tree_nodes_free() is unnecessary and wrong.
Fixes: 31568ec09ea0 ("netfilter: nf_conncount: fix list_del corruption in conn_free")
Signed-off-by: Taehee Yoo <ap420073@xxxxxxxxx>
---
net/netfilter/nf_conncount.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/net/netfilter/nf_conncount.c b/net/netfilter/nf_conncount.c
index 8acae4a3e4c0..b6d0f6deea86 100644
--- a/net/netfilter/nf_conncount.c
+++ b/net/netfilter/nf_conncount.c
@@ -323,11 +323,8 @@ static void tree_nodes_free(struct rb_root *root,
while (gc_count) {
rbconn = gc_nodes[--gc_count];
spin_lock(&rbconn->list.list_lock);
- if (rbconn->list.count == 0 && rbconn->list.dead == false) {
- rbconn->list.dead = true;
- rb_erase(&rbconn->node, root);
- call_rcu(&rbconn->rcu_head, __tree_nodes_free);
- }
+ rb_erase(&rbconn->node, root);
+ call_rcu(&rbconn->rcu_head, __tree_nodes_free);
spin_unlock(&rbconn->list.list_lock);
}
}
--
2.17.1
