From: Alexei Starovoitov
Date: Wed, 7 Oct 2015 10:55:41 -0700
> eBPF socket filter programs may see junk in 'u32 cb[5]' area,
> since it could have been used by protocol layers earlier.
>
> For socket filter programs used in af_packet we need to clean
> 20 bytes of skb->cb area if it could be u
eBPF socket filter programs may see junk in 'u32 cb[5]' area,
since it could have been used by protocol layers earlier.
For socket filter programs used in af_packet we need to clean
20 bytes of skb->cb area if it could be used by the program.
For programs attached to TCP/UDP sockets we need to sav
