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authorEric Dumazet <eric.dumazet@gmail.com>2010-08-25 23:44:35 +0000
committerDavid S. Miller <davem@davemloft.net>2010-08-26 13:29:38 -0700
commitbfc960a8eec023a170a80697fe65157cd4f44f81 (patch)
treee93d7b48b1fa732b99ce07e820ef6b9c220eed61 /net/l2tp
parentd84ba638e4ba3c40023ff997aa5e8d3ed002af36 (diff)
downloadlinux-bfc960a8eec023a170a80697fe65157cd4f44f81.tar.bz2
l2tp: test for ethernet header in l2tp_eth_dev_recv()
close https://bugzilla.kernel.org/show_bug.cgi?id=16529 Before calling dev_forward_skb(), we should make sure skb head contains at least an ethernet header, even if length included in upper layer said so. Use pskb_may_pull() to make sure this ethernet header is present in skb head. Reported-by: Thomas Heil <heil@terminal-consulting.de> Reported-by: Ian Campbell <Ian.Campbell@eu.citrix.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp')
-rw-r--r--net/l2tp/l2tp_eth.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index 58c6c4cda73b..1ae697681bc7 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -132,7 +132,7 @@ static void l2tp_eth_dev_recv(struct l2tp_session *session, struct sk_buff *skb,
printk("\n");
}
- if (data_len < ETH_HLEN)
+ if (!pskb_may_pull(skb, sizeof(ETH_HLEN)))
goto error;
secpath_reset(skb);