netdev - [PATCH net] macvlan: fix leak in macvlan_handle

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Message-Id: <d4141a7c4841ae5f631858a8537968419f0e396b.1447705984.git.sd@queasysnail.net>
Date:	Mon, 16 Nov 2015 22:54:20 +0100
From:	Sabrina Dubroca <sd@...asysnail.net>
To:	netdev@...r.kernel.org
Cc:	jiri@...nulli.us, kaber@...sh.net,
	Sabrina Dubroca <sd@...asysnail.net>
Subject: [PATCH net] macvlan: fix leak in macvlan_handle_frame

Reset pskb in macvlan_handle_frame in case skb_share_check returned a
clone.

Fixes: 8a4eb5734e8d ("net: introduce rx_handler results and logic around that")
Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
---
 drivers/net/macvlan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 86f6c6292c27..06c8bfeaccd6 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -415,6 +415,7 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
 		skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN);
 		if (!skb)
 			return RX_HANDLER_CONSUMED;
+		*pskb = skb;
 		eth = eth_hdr(skb);
 		macvlan_forward_source(skb, port, eth->h_source);
 		src = macvlan_hash_lookup(port, eth->h_source);
@@ -456,6 +457,7 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
 		goto out;
 	}
 
+	*pskb = skb;
 	skb->dev = dev;
 	skb->pkt_type = PACKET_HOST;
 
-- 
2.6.2

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