tree 52a3aede39b1bac6a409586bcdd272d9aa958868
parent c5fc9692d101d1318b0f53f9f691cd88ac029317
author David S. Miller <davem@davemloft.net> 1494441487 -0700
committer David S. Miller <davem@davemloft.net> 1494526740 -0400

bpf: Add strict alignment flag for BPF_PROG_LOAD.

Add a new field, "prog_flags", and an initial flag value
BPF_F_STRICT_ALIGNMENT.

When set, the verifier will enforce strict pointer alignment
regardless of the setting of CONFIG_EFFICIENT_UNALIGNED_ACCESS.

The verifier, in this mode, will also use a fixed value of "2" in
place of NET_IP_ALIGN.

This facilitates test cases that will exercise and validate this part
of the verifier even when run on architectures where alignment doesn't
matter.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>