[PATCH 4.3 36/71] tipc: fix error handling of expanding buffer headroom

[Greg Kroah-Hartman]

4.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ying Xue <ying.xue@xxxxxxxxxxxxx>

[ Upstream commit 7098356baca723513e97ca0020df4e18bc353be3 ]

Coverity says:

---
 net/tipc/udp_media.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -159,8 +159,11 @@ static int tipc_udp_send_msg(struct net
 	struct sk_buff *clone;
 	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;
+	}
 
 	clone = skb_clone(skb, GFP_ATOMIC);
 	skb_set_inner_protocol(clone, htons(ETH_P_TIPC));


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