netdev.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Daniel Borkmann <daniel@iogearbox.net>
To: alexei.starovoitov@gmail.com
Cc: netdev@vger.kernel.org, Daniel Borkmann <daniel@iogearbox.net>
Subject: [PATCH bpf-next v3 02/11] bpf: add also cbpf long jump test cases with heavy expansion
Date: Sat,  2 Jun 2018 23:06:32 +0200	[thread overview]
Message-ID: <20180602210641.6163-3-daniel@iogearbox.net> (raw)
In-Reply-To: <20180602210641.6163-1-daniel@iogearbox.net>

We have one triggering on eBPF but lets also add a cBPF example to
make sure we keep tracking them. Also add anther cBPF test running
max number of MSH ops.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
---
 lib/test_bpf.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 317f231..60aedc8 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -356,6 +356,52 @@ static int bpf_fill_maxinsns11(struct bpf_test *self)
 	return __bpf_fill_ja(self, BPF_MAXINSNS, 68);
 }
 
+static int bpf_fill_maxinsns12(struct bpf_test *self)
+{
+	unsigned int len = BPF_MAXINSNS;
+	struct sock_filter *insn;
+	int i = 0;
+
+	insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
+	if (!insn)
+		return -ENOMEM;
+
+	insn[0] = __BPF_JUMP(BPF_JMP | BPF_JA, len - 2, 0, 0);
+
+	for (i = 1; i < len - 1; i++)
+		insn[i] = __BPF_STMT(BPF_LDX | BPF_B | BPF_MSH, 0);
+
+	insn[len - 1] = __BPF_STMT(BPF_RET | BPF_K, 0xabababab);
+
+	self->u.ptr.insns = insn;
+	self->u.ptr.len = len;
+
+	return 0;
+}
+
+static int bpf_fill_maxinsns13(struct bpf_test *self)
+{
+	unsigned int len = BPF_MAXINSNS;
+	struct sock_filter *insn;
+	int i = 0;
+
+	insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
+	if (!insn)
+		return -ENOMEM;
+
+	for (i = 0; i < len - 3; i++)
+		insn[i] = __BPF_STMT(BPF_LDX | BPF_B | BPF_MSH, 0);
+
+	insn[len - 3] = __BPF_STMT(BPF_LD | BPF_IMM, 0xabababab);
+	insn[len - 2] = __BPF_STMT(BPF_ALU | BPF_XOR | BPF_X, 0);
+	insn[len - 1] = __BPF_STMT(BPF_RET | BPF_A, 0);
+
+	self->u.ptr.insns = insn;
+	self->u.ptr.len = len;
+
+	return 0;
+}
+
 static int bpf_fill_ja(struct bpf_test *self)
 {
 	/* Hits exactly 11 passes on x86_64 JIT. */
@@ -5290,6 +5336,23 @@ static struct bpf_test tests[] = {
 		.expected_errcode = -ENOTSUPP,
 	},
 	{
+		"BPF_MAXINSNS: jump over MSH",
+		{ },
+		CLASSIC | FLAG_EXPECTED_FAIL,
+		{ 0xfa, 0xfb, 0xfc, 0xfd, },
+		{ { 4, 0xabababab } },
+		.fill_helper = bpf_fill_maxinsns12,
+		.expected_errcode = -EINVAL,
+	},
+	{
+		"BPF_MAXINSNS: exec all MSH",
+		{ },
+		CLASSIC,
+		{ 0xfa, 0xfb, 0xfc, 0xfd, },
+		{ { 4, 0xababab83 } },
+		.fill_helper = bpf_fill_maxinsns13,
+	},
+	{
 		"BPF_MAXINSNS: ld_abs+get_processor_id",
 		{ },
 		CLASSIC,
-- 
2.9.5

  parent reply	other threads:[~2018-06-02 21:07 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-02 21:06 [PATCH bpf-next v3 00/11] Misc BPF improvements Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 01/11] bpf: test case for map pointer poison with calls/branches Daniel Borkmann
2018-06-02 21:06 ` Daniel Borkmann [this message]
2018-06-02 21:06 ` [PATCH bpf-next v3 03/11] bpf: fixup error message from gpl helpers on license mismatch Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 04/11] bpf: show prog and map id in fdinfo Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 05/11] bpf: avoid retpoline for lookup/update/delete calls on maps Daniel Borkmann
2018-06-03  6:56   ` Jesper Dangaard Brouer
2018-06-03 16:11     ` Daniel Borkmann
2018-06-03 17:08       ` Jesper Dangaard Brouer
2018-06-04 11:02         ` Phil Sutter
2018-06-04 18:25           ` Jakub Kicinski
2018-06-04 19:45             ` Daniel Borkmann
2018-06-04 22:36             ` David Ahern
2018-06-02 21:06 ` [PATCH bpf-next v3 06/11] bpf: add bpf_skb_cgroup_id helper Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 07/11] bpf: make sure to clear unused fields in tunnel/xfrm state fetch Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 08/11] bpf: fix cbpf parser bug for octal numbers Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 09/11] bpf: fix context access in tracing progs on 32 bit archs Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 10/11] bpf: sync bpf uapi header with tools Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 11/11] bpf, doc: add missing patchwork url and libbpf to maintainers Daniel Borkmann
2018-06-03 15:08 ` [PATCH bpf-next v3 00/11] Misc BPF improvements Alexei Starovoitov

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180602210641.6163-3-daniel@iogearbox.net \
    --to=daniel@iogearbox.net \
    --cc=alexei.starovoitov@gmail.com \
    --cc=netdev@vger.kernel.org \
    --subject='Re: [PATCH bpf-next v3 02/11] bpf: add also cbpf long jump test cases with heavy expansion' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).