Re: [syzbot] [can?] WARNING: refcount bug in j1939_session_put

[Edward Adam Davis]

session skb_queue get ref to skb

#syz test: net-next 743ff02152bc

diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index 4be73de5033c..5881d2081aeb 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -1506,6 +1506,7 @@ static struct j1939_session *j1939_session_new(struct j1939_priv *priv,
 
 	skb_queue_head_init(&session->skb_queue);
 	skb_queue_tail(&session->skb_queue, skb);
+	skb_get(skb);
 
 	skcb = j1939_skb_to_cb(skb);
 	memcpy(&session->skcb, skcb, sizeof(session->skcb));