From 5a4c355229da12558b5ded0775f4d0bc6650d28d Mon Sep 17 00:00:00 2001 From: Jon Maloy Date: Wed, 29 Jul 2015 18:28:01 -0400 Subject: [PATCH] tipc: fix bug in broadcast synch message create function In commit d999297c3dbbe7fdd832f7fa4ec84301e170b3e6 ("tipc: reduce locking scope during packet reception") we introduced a new function tipc_build_bcast_sync_msg(), which carries initial synchronization data between two nodes at first contact and at re-contact. In this function, we missed to add synchronization data, with the effect that the broadcast link endpoints will fail to synchronize correctly at re-contact between a running and a restarted node. All other cases work as intended. With this commit, we fix this bug. Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/link.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/tipc/link.c b/net/tipc/link.c index b63d57390bb7..cc40aa6eb66c 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -294,11 +294,14 @@ static void tipc_link_build_bcast_sync_msg(struct tipc_link *l, { struct sk_buff *skb; struct sk_buff_head list; + u16 last_sent; skb = tipc_msg_create(BCAST_PROTOCOL, STATE_MSG, INT_H_SIZE, 0, l->addr, link_own_addr(l), 0, 0, 0); if (!skb) return; + last_sent = tipc_bclink_get_last_sent(l->owner->net); + msg_set_last_bcast(buf_msg(skb), last_sent); __skb_queue_head_init(&list); __skb_queue_tail(&list, skb); tipc_link_xmit(l, &list, xmitq); -- GitLab