From: Linus Lüssing linus.luessing@c0d3.blue
When purging an orig_node we should only decrease counter tracking the number of nodes without multicast optimizations support if it was increased through this orig_node before.
A not yet quite initialized orig_node (meaning it did not have its turn in the mcast-tvlv handler so far) which gets purged would not adhere to this and will lead to a counter imbalance.
Fixing this by adding a check whether the orig_node is mcast-initalized before decreasing the counter in the mcast-orig_node-purging routine.
Introduced by 60432d756cf06e597ef9da511402dd059b112447 ("batman-adv: Announce new capability via multicast TVLV")
Reported-by: Tobias Hachmer tobias@hachmer.de Signed-off-by: Linus Lüssing linus.luessing@c0d3.blue Signed-off-by: Marek Lindner mareklindner@neomailbox.ch Signed-off-by: Antonio Quartulli antonio@meshcoding.com --- net/batman-adv/multicast.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c index d3503fb..b24e4bb 100644 --- a/net/batman-adv/multicast.c +++ b/net/batman-adv/multicast.c @@ -740,7 +740,8 @@ void batadv_mcast_purge_orig(struct batadv_orig_node *orig) { struct batadv_priv *bat_priv = orig->bat_priv;
- if (!(orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST)) + if (!(orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST) && + orig->capa_initialized & BATADV_ORIG_CAPA_HAS_MCAST) atomic_dec(&bat_priv->mcast.num_disabled);
batadv_mcast_want_unsnoop_update(bat_priv, orig, BATADV_NO_FLAGS);