[PATCH net] bpf, arm64: fix jit branch offset related to ldimm64

[David Miller]

From: Daniel Borkmann <daniel at iogearbox.net>
Date: Tue,  2 May 2017 20:34:54 +0200

> When the instruction right before the branch destination is
> a 64 bit load immediate, we currently calculate the wrong
> jump offset in the ctx->offset[] array as we only account
> one instruction slot for the 64 bit load immediate although
> it uses two BPF instructions. Fix it up by setting the offset
> into the right slot after we incremented the index.
 ...
> Also, add a couple of test cases to make sure JITs pass
> this test. Tested on Cavium ThunderX ARMv8. The added
> test cases all pass after the fix.
> 
> Fixes: 8eee539ddea0 ("arm64: bpf: fix out-of-bounds read in bpf2a64_offset()")
> Reported-by: David S. Miller <davem at davemloft.net>
> Signed-off-by: Daniel Borkmann <daniel at iogearbox.net>
> Acked-by: Alexei Starovoitov <ast at kernel.org>

Applied and queued up for -stable, thanks!

I also applied your XADD patch as well.

Thanks again.