[PATCH net] fm10k: fix potential memleak in fm10k_xmit_frame()

[Zhang Changzhong]

The fm10k_xmit_frame() returns NETDEV_TX_OK without freeing skb in error
handling case, add dev_kfree_skb() to fix it. Compile tested only.

Fixes: b101c9626477 ("fm10k: Add transmit and receive fastpath and interrupt handlers")
Signed-off-by: Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>
---
 drivers/net/ethernet/intel/fm10k/fm10k_netdev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
index 2cca9e8..c7b672a 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
@@ -531,8 +531,10 @@ static netdev_tx_t fm10k_xmit_frame(struct sk_buff *skb, struct net_device *dev)
 			return NETDEV_TX_OK;
 
 		/* make sure there is enough room to move the ethernet header */
-		if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
+		if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN))) {
+			dev_kfree_skb(skb);
 			return NETDEV_TX_OK;
+		}
 
 		/* verify the skb head is not shared */
 		err = skb_cow_head(skb, 0);
-- 
2.9.5