Re: [PATCH bpf-next v3 6/6] bpf: selftests: Add defrag selftests

[Alexei Starovoitov]

On Fri, Jul 7, 2023 at 9:51 AM Daniel Xu <dxu@xxxxxxxxx> wrote:
>
> These selftests tests 2 major scenarios: the BPF based defragmentation
> can successfully be done and that packet pointers are invalidated after
> calls to the kfunc. The logic is similar for both ipv4 and ipv6.
>
> In the first scenario, we create a UDP client and UDP echo server. The
> the server side is fairly straightforward: we attach the prog and simply
> echo back the message.
>
> The on the client side, we send fragmented packets to and expect the
> reassembled message back from the server.
>
> Signed-off-by: Daniel Xu <dxu@xxxxxxxxx>

The patches look good, but new tests are failing on arm64.

test_bpf_ip_check_defrag_ok:FAIL:server recvfrom unexpected server
recvfrom: actual -1 < expected 0

see BPF CI.
Feels like a timing issue, but pls take a look.