Commit c69d4407 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont Committed by David S. Miller

Phonet: fix NULL dereference on TX path with implicit source

The previous Phonet patch series introduced per-socket implicit
destination (i.e. connect()). In that case, the destination
socket address is NULL in the transmit function.
However commit a8059512
("Phonet: implement per-socket destination/peer address")
is incomplete and would trigger a NULL dereference.
(Fortunately, the code is not in released kernel, and in fact
 currently not reachable.)
Signed-off-by: default avatarRémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7b46ac4e
...@@ -262,10 +262,9 @@ int pn_skb_send(struct sock *sk, struct sk_buff *skb, ...@@ -262,10 +262,9 @@ int pn_skb_send(struct sock *sk, struct sk_buff *skb,
else if (phonet_address_lookup(net, daddr) == 0) { else if (phonet_address_lookup(net, daddr) == 0) {
dev = phonet_device_get(net); dev = phonet_device_get(net);
skb->pkt_type = PACKET_LOOPBACK; skb->pkt_type = PACKET_LOOPBACK;
} else if (pn_sockaddr_get_object(target) == 0) { } else if (dst == 0) {
/* Resource routing (small race until phonet_rcv()) */ /* Resource routing (small race until phonet_rcv()) */
struct sock *sk = pn_find_sock_by_res(net, struct sock *sk = pn_find_sock_by_res(net, res);
target->spn_resource);
if (sk) { if (sk) {
sock_put(sk); sock_put(sk);
dev = phonet_device_get(net); dev = phonet_device_get(net);
......
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