From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nikita V. Shirokov" Subject: [PATCH bpf-next v2 09/11] bpf: making bpf_prog_test run aware of possible data_end ptr change Date: Tue, 17 Apr 2018 21:29:49 -0700 Message-ID: <20180418042951.17183-10-tehnerd@tehnerd.com> References: <20180418042951.17183-1-tehnerd@tehnerd.com> Cc: netdev@vger.kernel.org, "Nikita V. Shirokov" To: Alexei Starovoitov , Daniel Borkmann Return-path: Received: from mail-pl0-f46.google.com ([209.85.160.46]:45075 "EHLO mail-pl0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752741AbeDRGF7 (ORCPT ); Wed, 18 Apr 2018 02:05:59 -0400 Received: by mail-pl0-f46.google.com with SMTP id k9-v6so452243pll.12 for ; Tue, 17 Apr 2018 23:05:58 -0700 (PDT) In-Reply-To: <20180418042951.17183-1-tehnerd@tehnerd.com> Sender: netdev-owner@vger.kernel.org List-ID: after introduction of bpf_xdp_adjust_tail helper packet length could be changed not only if xdp->data pointer has been changed but xdp->data_end as well. making bpf_prog_test_run aware of this possibility --- net/bpf/test_run.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 2ced48662c1f..68c3578343b4 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -170,7 +170,8 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, xdp.rxq = &rxqueue->xdp_rxq; retval = bpf_test_run(prog, &xdp, repeat, &duration); - if (xdp.data != data + XDP_PACKET_HEADROOM + NET_IP_ALIGN) + if (xdp.data != data + XDP_PACKET_HEADROOM + NET_IP_ALIGN || + xdp.data_end != xdp.data + size) size = xdp.data_end - xdp.data; ret = bpf_test_finish(kattr, uattr, xdp.data, size, retval, duration); kfree(data); -- 2.15.1