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authorEric Dumazet <eric.dumazet@gmail.com>2010-05-06 00:53:53 -0700
committerDavid S. Miller <davem@davemloft.net>2010-05-06 00:53:53 -0700
commit6ec82562ffc6f297d0de36d65776cff8e5704867 (patch)
tree5c023102ddce1ae5f5a7b05f1f42766537ef86d1 /net
parentd40a4de0be08f005814a4fddac748fe5353208ec (diff)
downloadop-kernel-dev-6ec82562ffc6f297d0de36d65776cff8e5704867.zip
op-kernel-dev-6ec82562ffc6f297d0de36d65776cff8e5704867.tar.gz
veth: Dont kfree_skb() after dev_forward_skb()
In case of congestion, netif_rx() frees the skb, so we must assume dev_forward_skb() also consume skb. Bug introduced by commit 445409602c092 (veth: move loopback logic to common location) We must change dev_forward_skb() to always consume skb, and veth to not double free it. Bug report : http://marc.info/?l=linux-netdev&m=127310770900442&w=3 Reported-by: Martín Ferrari <martin.ferrari@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index f769098..264137f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1451,7 +1451,7 @@ static inline void net_timestamp(struct sk_buff *skb)
*
* return values:
* NET_RX_SUCCESS (no congestion)
- * NET_RX_DROP (packet was dropped)
+ * NET_RX_DROP (packet was dropped, but freed)
*
* dev_forward_skb can be used for injecting an skb from the
* start_xmit function of one device into the receive queue
@@ -1465,12 +1465,11 @@ int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
{
skb_orphan(skb);
- if (!(dev->flags & IFF_UP))
- return NET_RX_DROP;
-
- if (skb->len > (dev->mtu + dev->hard_header_len))
+ if (!(dev->flags & IFF_UP) ||
+ (skb->len > (dev->mtu + dev->hard_header_len))) {
+ kfree_skb(skb);
return NET_RX_DROP;
-
+ }
skb_set_dev(skb, dev);
skb->tstamp.tv64 = 0;
skb->pkt_type = PACKET_HOST;
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