linux-kernel - [PATCH 3.2 15/77] macvlan: fix leak in macvlan_handle

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Message-ID: <lsq.1450971462.743078227@decadent.org.uk>
Date:	Thu, 24 Dec 2015 15:37:42 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Sabrina Dubroca" <sd@...asysnail.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.2 15/77] macvlan: fix leak in macvlan_handle_frame

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

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

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

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: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/macvlan.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -172,6 +172,7 @@ static rx_handler_result_t macvlan_handl
 		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)
@@ -221,6 +222,7 @@ static rx_handler_result_t macvlan_handl
 	if (!skb)
 		goto out;
 
+	*pskb = skb;
 	skb->dev = dev;
 	skb->pkt_type = PACKET_HOST;
 

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