netdev - [PATCH 5/5] vti: Fix recource leeks on pmtu discovery

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Message-ID: <1457605469-17332-6-git-send-email-steffen.klassert@secunet.com>
Date:	Thu, 10 Mar 2016 11:24:29 +0100
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	David Miller <davem@...emloft.net>
CC:	Herbert Xu <herbert@...dor.apana.org.au>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	<netdev@...r.kernel.org>
Subject: [PATCH 5/5] vti: Fix recource leeks on pmtu discovery

A recent patch introduced pmtu handling directly in the
vti transmit routine. Unfortunately we now return without
releasing the dst_entry and freeing the sk_buff. This patch
fixes the issue.

Fixes: 325b71fe0f57 ("vti: Add pmtu handling to vti_xmit.")
Reported-by: Mark McKinstry <Mark.McKinstry@...iedtelesis.co.nz>
Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
---
 net/ipv4/ip_vti.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 6862305..2ea2b6e 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -206,7 +206,8 @@ static netdev_tx_t vti_xmit(struct sk_buff *skb, struct net_device *dev,
 		else
 			icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
 
-		return -EMSGSIZE;
+		dst_release(dst);
+		goto tx_error;
 	}
 
 	err = dst_output(tunnel->net, skb->sk, skb);
-- 
1.9.1