From: Ying Xue <ying....@windriver.com>
Date: Sun, 22 Nov 2015 15:38:39 +0800
> @@ -158,8 +158,11 @@ static int tipc_udp_send_msg(struct net *net, struct
> sk_buff *skb,
> struct udp_media_addr *src = (struct udp_media_addr *)&b->addr.value;
> struct rtable *rt;
>
> - if (skb_headroom(skb) < UDP_MIN_HEADROOM)
> - pskb_expand_head(skb, UDP_MIN_HEADROOM, 0, GFP_ATOMIC);
> + if (skb_headroom(skb) < UDP_MIN_HEADROOM) {
> + err = pskb_expand_head(skb, UDP_MIN_HEADROOM, 0, GFP_ATOMIC);
> + if (!err)
> + goto tx_error;
> + }
pskb_expand_head() returns negative error codes, therefore zero means
success and therefore this "!err" check is reversed.
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