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-rw-r--r--net/tipc/node.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/net/tipc/node.c b/net/tipc/node.c
index e9295fa3a554..4512e83652b1 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1505,19 +1505,21 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b)
{
struct sk_buff_head xmitq;
struct tipc_node *n;
- struct tipc_msg *hdr = buf_msg(skb);
- int usr = msg_user(hdr);
+ struct tipc_msg *hdr;
int bearer_id = b->identity;
struct tipc_link_entry *le;
- u16 bc_ack = msg_bcast_ack(hdr);
u32 self = tipc_own_addr(net);
- int rc = 0;
+ int usr, rc = 0;
+ u16 bc_ack;
__skb_queue_head_init(&xmitq);
- /* Ensure message is well-formed */
+ /* Ensure message is well-formed before touching the header */
if (unlikely(!tipc_msg_validate(skb)))
goto discard;
+ hdr = buf_msg(skb);
+ usr = msg_user(hdr);
+ bc_ack = msg_bcast_ack(hdr);
/* Handle arrival of discovery or broadcast packet */
if (unlikely(msg_non_seq(hdr))) {