From: Dmitry Mishin <redacted>
Date: Wed, 30 Aug 2006 17:07:14 +0400

Function sk_filter() is called from tcp_v{4,6}_rcv() functions with argue 
needlock = 0, while socket is not locked at that moment. In order to avoid 
this and similar issues in the future, use rcu for sk->sk_filter field read 
protection.

Patch is for net-2.6.19

Signed-off-by: Dmitry Mishin <redacted>
Signed-off-by: Alexey Kuznetsov <redacted>
Signed-off-by: Kirill Korotaev <redacted>

Dmitry, your email client chopped up the longer lines in the patch
such as:

-static inline int sk_filter(struct sock *sk, struct sk_buff *skb, int 
needlock)
+static inline int sk_filter(struct sock *sk, struct sk_buff *skb)

Here.

-static inline unsigned run_filter(struct sk_buff *skb, struct sock *sk, 
unsigned res)
+static inline int run_filter(struct sk_buff *skb, struct sock *sk,

And there.

But I fixed these up and applied the patch to net-2.6.19

I think we seriously need to think about fixing this bug,
in so me form, for 2.6.18