[2/3] powerpc: bpf: flush the entire JIT buffer

[Michael Ellerman]

On Fri, 2017-01-13 at 17:10:01 UTC, "Naveen N. Rao" wrote:
> With bpf_jit_binary_alloc(), we allocate at a page granularity and fill
> the rest of the space with illegal instructions to mitigate BPF spraying
> attacks, while having the actual JIT'ed BPF program at a random location
> within the allocated space. Under this scenario, it would be better to
> flush the entire allocated buffer rather than just the part containing
> the actual program. We already flush the buffer from start to the end of
> the BPF program. Extend this to include the illegal instructions after
> the BPF program.
> 
> Signed-off-by: Naveen N. Rao <naveen.n.rao at linux.vnet.ibm.com>
> Acked-by: Alexei Starovoitov <ast at kernel.org>
> Acked-by: Daniel Borkmann <daniel at iogearbox.net>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/10528b9c45cfb9e8f45217ef2f5ef8

cheers