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Diffstat (limited to 'net/tipc/link.c')
-rw-r--r--net/tipc/link.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 1e14d7f8f28f..e260c0d557f5 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -2286,6 +2286,11 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
break;
case STATE_MSG:
+ /* Validate Gap ACK blocks, drop if invalid */
+ glen = tipc_get_gap_ack_blks(&ga, l, hdr, true);
+ if (glen > dlen)
+ break;
+
l->rcv_nxt_state = msg_seqno(hdr) + 1;
/* Update own tolerance if peer indicates a non-zero value */
@@ -2311,10 +2316,6 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
break;
}
- /* Receive Gap ACK blocks from peer if any */
- glen = tipc_get_gap_ack_blks(&ga, l, hdr, true);
- if(glen > dlen)
- break;
tipc_mon_rcv(l->net, data + glen, dlen - glen, l->addr,
&l->mon_state, l->bearer_id);