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Diffstat (limited to 'net/tipc/link.c')
-rw-r--r--net/tipc/link.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 8d9e09f48f4c..1e14d7f8f28f 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -2200,7 +2200,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
struct tipc_msg *hdr = buf_msg(skb);
struct tipc_gap_ack_blks *ga = NULL;
bool reply = msg_probe(hdr), retransmitted = false;
- u16 dlen = msg_data_sz(hdr), glen = 0;
+ u32 dlen = msg_data_sz(hdr), glen = 0;
u16 peers_snd_nxt = msg_next_sent(hdr);
u16 peers_tol = msg_link_tolerance(hdr);
u16 peers_prio = msg_linkprio(hdr);
@@ -2214,6 +2214,10 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
void *data;
trace_tipc_proto_rcv(skb, false, l->name);
+
+ if (dlen > U16_MAX)
+ goto exit;
+
if (tipc_link_is_blocked(l) || !xmitq)
goto exit;
@@ -2309,7 +2313,8 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
/* 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);