From: Eiichi Tsukata eiichi.tsukata@nutanix.com
commit beacff50edbd6c9659a6f15fc7f6126909fade29 upstream.
Need to call rxrpc_put_local() for peer candidate before kfree() as it holds a ref to rxrpc_local.
[DH: v2: Changed to abstract the peer freeing code out into a function]
Fixes: 9ebeddef58c4 ("rxrpc: rxrpc_peer needs to hold a ref on the rxrpc_local record") Signed-off-by: Eiichi Tsukata eiichi.tsukata@nutanix.com Signed-off-by: David Howells dhowells@redhat.com Reviewed-by: Marc Dionne marc.dionne@auristor.com cc: linux-afs@lists.infradead.org Link: https://lore.kernel.org/all/20211121041608.133740-2-eiichi.tsukata@nutanix.c... # v1 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/rxrpc/peer_object.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
--- a/net/rxrpc/peer_object.c +++ b/net/rxrpc/peer_object.c @@ -299,6 +299,12 @@ static struct rxrpc_peer *rxrpc_create_p return peer; }
+static void rxrpc_free_peer(struct rxrpc_peer *peer) +{ + rxrpc_put_local(peer->local); + kfree_rcu(peer, rcu); +} + /* * Set up a new incoming peer. There shouldn't be any other matching peers * since we've already done a search in the list from the non-reentrant context @@ -365,7 +371,7 @@ struct rxrpc_peer *rxrpc_lookup_peer(str spin_unlock_bh(&rxnet->peer_hash_lock);
if (peer) - kfree(candidate); + rxrpc_free_peer(candidate); else peer = candidate; } @@ -420,8 +426,7 @@ static void __rxrpc_put_peer(struct rxrp list_del_init(&peer->keepalive_link); spin_unlock_bh(&rxnet->peer_hash_lock);
- rxrpc_put_local(peer->local); - kfree_rcu(peer, rcu); + rxrpc_free_peer(peer); }
/* @@ -457,8 +462,7 @@ void rxrpc_put_peer_locked(struct rxrpc_ if (n == 0) { hash_del_rcu(&peer->hash_link); list_del_init(&peer->keepalive_link); - rxrpc_put_local(peer->local); - kfree_rcu(peer, rcu); + rxrpc_free_peer(peer); } }