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authorDavid S. Miller <davem@davemloft.net>2016-01-13 14:57:42 -0500
committerDavid S. Miller <davem@davemloft.net>2016-01-13 14:57:42 -0500
commit1adbfc435f0897101443975fdbd20e8817ad5fd9 (patch)
treeab74fffe33fb8ebb0b586c99ca2027a80a04ba35 /net
parente752991a2e6a1dc33271a6299d5c1c8688f35f95 (diff)
parentbab7c6c3deac70966a3000402c0ea6d0c20edd15 (diff)
Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge
Antonio Quartulli says: ==================== net: batman-adv 20160114 Included bugfixes: - avoid freeing batadv_hardif_neigh_node when still in use in other contexts - prevent lockdep splat in mcast_free during shutdown ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/batman-adv/multicast.c2
-rw-r--r--net/batman-adv/originator.c18
2 files changed, 14 insertions, 6 deletions
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index eb76386f8d4b..75fa5013af72 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -802,7 +802,9 @@ void batadv_mcast_free(struct batadv_priv *bat_priv)
batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_MCAST, 1);
batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_MCAST, 1);
+ spin_lock_bh(&bat_priv->tt.commit_lock);
batadv_mcast_mla_tt_retract(bat_priv, NULL);
+ spin_unlock_bh(&bat_priv->tt.commit_lock);
}
/**
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 3c782a33bdac..ae6d18cafc5a 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -211,10 +211,6 @@ static void batadv_hardif_neigh_free_rcu(struct rcu_head *rcu)
hardif_neigh = container_of(rcu, struct batadv_hardif_neigh_node, rcu);
- spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
- hlist_del_init_rcu(&hardif_neigh->list);
- spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
-
batadv_hardif_free_ref_now(hardif_neigh->if_incoming);
kfree(hardif_neigh);
}
@@ -227,8 +223,13 @@ static void batadv_hardif_neigh_free_rcu(struct rcu_head *rcu)
static void
batadv_hardif_neigh_free_now(struct batadv_hardif_neigh_node *hardif_neigh)
{
- if (atomic_dec_and_test(&hardif_neigh->refcount))
+ if (atomic_dec_and_test(&hardif_neigh->refcount)) {
+ spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+ hlist_del_init_rcu(&hardif_neigh->list);
+ spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+
batadv_hardif_neigh_free_rcu(&hardif_neigh->rcu);
+ }
}
/**
@@ -238,8 +239,13 @@ batadv_hardif_neigh_free_now(struct batadv_hardif_neigh_node *hardif_neigh)
*/
void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh)
{
- if (atomic_dec_and_test(&hardif_neigh->refcount))
+ if (atomic_dec_and_test(&hardif_neigh->refcount)) {
+ spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+ hlist_del_init_rcu(&hardif_neigh->list);
+ spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
+
call_rcu(&hardif_neigh->rcu, batadv_hardif_neigh_free_rcu);
+ }
}
/**