diff options
| author | Sarveshwar Bandi <sarveshwar.bandi@emulex.com> | 2012-10-10 01:15:01 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-14 10:49:07 -0800 |
| commit | 94fab0a18e9cbec420c58c7b12b93acf1663c3fd (patch) | |
| tree | 3257222639a169f5a25876ad2bca46dbddce426b | |
| parent | f641de91169472dc398fbd971cef380ad8d0f787 (diff) | |
bridge: Pull ip header into skb->data before looking into ip header.
[ Upstream commit 6caab7b0544e83e6c160b5e80f5a4a7dd69545c7 ]
If lower layer driver leaves the ip header in the skb fragment, it needs to
be first pulled into skb->data before inspecting ip header length or ip version
number.
Signed-off-by: Sarveshwar Bandi <sarveshwar.bandi@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/bridge/br_netfilter.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index d7f49b63ab0..e54ef82fdad 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -254,6 +254,9 @@ static int br_parse_ip_options(struct sk_buff *skb) struct net_device *dev = skb->dev; u32 len; + if (!pskb_may_pull(skb, sizeof(struct iphdr))) + goto inhdr_error; + iph = ip_hdr(skb); opt = &(IPCB(skb)->opt); |