summaryrefslogtreecommitdiff
path: root/net/can/j1939
diff options
context:
space:
mode:
Diffstat (limited to 'net/can/j1939')
-rw-r--r--net/can/j1939/main.c4
-rw-r--r--net/can/j1939/socket.c5
2 files changed, 8 insertions, 1 deletions
diff --git a/net/can/j1939/main.c b/net/can/j1939/main.c
index da3a7a7bcff2..08c8606cfd9c 100644
--- a/net/can/j1939/main.c
+++ b/net/can/j1939/main.c
@@ -193,6 +193,10 @@ static void j1939_can_rx_unregister(struct j1939_priv *priv)
can_rx_unregister(dev_net(ndev), ndev, J1939_CAN_ID, J1939_CAN_MASK,
j1939_can_recv, priv);
+ /* The last reference of priv is dropped by the RCU deferred
+ * j1939_sk_sock_destruct() of the last socket, so we can
+ * safely drop this reference here.
+ */
j1939_priv_put(priv);
}
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index bf18a32dc6ae..54f6d521492f 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -398,6 +398,9 @@ static int j1939_sk_init(struct sock *sk)
atomic_set(&jsk->skb_pending, 0);
spin_lock_init(&jsk->sk_session_queue_lock);
INIT_LIST_HEAD(&jsk->sk_session_queue);
+
+ /* j1939_sk_sock_destruct() depends on SOCK_RCU_FREE flag */
+ sock_set_flag(sk, SOCK_RCU_FREE);
sk->sk_destruct = j1939_sk_sock_destruct;
sk->sk_protocol = CAN_J1939;
@@ -673,7 +676,7 @@ static int j1939_sk_setsockopt(struct socket *sock, int level, int optname,
switch (optname) {
case SO_J1939_FILTER:
- if (!sockptr_is_null(optval)) {
+ if (!sockptr_is_null(optval) && optlen != 0) {
struct j1939_filter *f;
int c;