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[1/8] Phonet: fix NULL dereference on TX path with implicit source

Message ID 1299660253-4446-1-git-send-email-remi.denis-courmont@nokia.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Rémi Denis-Courmont March 9, 2011, 8:44 a.m. UTC
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 a8059512b120362b15424f152b2548fe8b11bd0c
("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: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
---
 net/phonet/af_phonet.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index 30cc676..4706b77 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -262,10 +262,9 @@  int pn_skb_send(struct sock *sk, struct sk_buff *skb,
 	else if (phonet_address_lookup(net, daddr) == 0) {
 		dev = phonet_device_get(net);
 		skb->pkt_type = PACKET_LOOPBACK;
-	} else if (pn_sockaddr_get_object(target) == 0) {
+	} else if (dst == 0) {
 		/* Resource routing (small race until phonet_rcv()) */
-		struct sock *sk = pn_find_sock_by_res(net,
-							target->spn_resource);
+		struct sock *sk = pn_find_sock_by_res(net, res);
 		if (sk)	{
 			sock_put(sk);
 			dev = phonet_device_get(net);