linux-kernel - [PATCH 3.4 037/125] macvlan: fix leak in macvlan_handle

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Date:   Wed, 12 Oct 2016 20:32:33 +0800
From:   lizf@...nel.org
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Sabrina Dubroca <sd@...asysnail.net>,
        "David S. Miller" <davem@...emloft.net>,
        Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 037/125] macvlan: fix leak in macvlan_handle_frame

From: Sabrina Dubroca <sd@...asysnail.net>

3.4.113-rc1 review patch.  If anyone has any objections, please let me know.

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


commit e639b8d8a7a728f0b05ef2df6cb6b45dc3d4e556 upstream.

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>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/net/macvlan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 6749acf..e735239 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -173,6 +173,7 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
 		skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
 		if (!skb)
 			return RX_HANDLER_CONSUMED;
+		*pskb = skb;
 		eth = eth_hdr(skb);
 		src = macvlan_hash_lookup(port, eth->h_source);
 		if (!src)
@@ -222,6 +223,7 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
 	if (!skb)
 		goto out;
 
+	*pskb = skb;
 	skb->dev = dev;
 	skb->pkt_type = PACKET_HOST;
 
-- 
1.9.1