From 0a186b49bba596b81de5a686ce5bfc9cd48ab3ef Mon Sep 17 00:00:00 2001 From: Linus Lüssing Date: Wed, 17 Jan 2024 06:22:20 +0100 Subject: batman-adv: mcast: fix memory leak on deleting a batman-adv interface MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The batman-adv multicast tracker TVLV handler is registered for the new batman-adv multicast packet type upon creating a batman-adv interface, but not unregistered again upon the interface's deletion, leading to a memory leak. Fix this memory leak by calling the according TVLV handler unregister routine for the multicast tracker TVLV upon batman-adv interface deletion. Fixes: 07afe1ba288c ("batman-adv: mcast: implement multicast packet reception and forwarding") Reported-and-tested-by: syzbot+ebe64cc5950868e77358@syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/000000000000beadc4060f0cbc23@google.com/ Signed-off-by: Linus Lüssing Signed-off-by: Sven Eckelmann Signed-off-by: Simon Wunderlich --- net/batman-adv/multicast.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/batman-adv') diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c index b4f8b4af1722..14088c4ff2f6 100644 --- a/net/batman-adv/multicast.c +++ b/net/batman-adv/multicast.c @@ -2175,6 +2175,7 @@ void batadv_mcast_free(struct batadv_priv *bat_priv) cancel_delayed_work_sync(&bat_priv->mcast.work); batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_MCAST, 2); + batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_MCAST_TRACKER, 1); batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_MCAST, 2); /* safely calling outside of worker, as worker was canceled above */ -- cgit