From: Alexei Starovoitov <ast@fb.com>
To: "David S . Miller" <davem@davemloft.net>
Cc: Daniel Borkmann <daniel@iogearbox.net>, <netdev@vger.kernel.org>,
<kernel-team@fb.com>
Subject: [PATCH net-next 7/7] samples/bpf: add verifier tests
Date: Thu, 5 May 2016 19:49:15 -0700 [thread overview]
Message-ID: <1462502955-1731797-8-git-send-email-ast@fb.com> (raw)
In-Reply-To: <1462502955-1731797-1-git-send-email-ast@fb.com>
add few tests for "pointer to packet" logic of the verifier
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
samples/bpf/test_verifier.c | 80 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 80 insertions(+)
diff --git a/samples/bpf/test_verifier.c b/samples/bpf/test_verifier.c
index 9eba8d1d9dcc..fe2fcec98c1f 100644
--- a/samples/bpf/test_verifier.c
+++ b/samples/bpf/test_verifier.c
@@ -1448,6 +1448,86 @@ static struct bpf_test tests[] = {
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
+ {
+ "pkt: test1",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
+ offsetof(struct __sk_buff, data)),
+ BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
+ offsetof(struct __sk_buff, data_end)),
+ BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
+ BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_2, 0),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SCHED_CLS,
+ },
+ {
+ "pkt: test2",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1,
+ offsetof(struct __sk_buff, data_end)),
+ BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
+ offsetof(struct __sk_buff, data)),
+ BPF_MOV64_REG(BPF_REG_5, BPF_REG_3),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_5, 14),
+ BPF_JMP_REG(BPF_JGT, BPF_REG_5, BPF_REG_4, 15),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_3, 7),
+ BPF_LDX_MEM(BPF_B, BPF_REG_4, BPF_REG_3, 12),
+ BPF_ALU64_IMM(BPF_MUL, BPF_REG_4, 14),
+ BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
+ offsetof(struct __sk_buff, data)),
+ BPF_ALU64_REG(BPF_ADD, BPF_REG_3, BPF_REG_4),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_1),
+ BPF_ALU64_IMM(BPF_LSH, BPF_REG_2, 48),
+ BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 48),
+ BPF_ALU64_REG(BPF_ADD, BPF_REG_3, BPF_REG_2),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_3),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 8),
+ BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_1,
+ offsetof(struct __sk_buff, data_end)),
+ BPF_JMP_REG(BPF_JGT, BPF_REG_2, BPF_REG_1, 1),
+ BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_3, 4),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SCHED_CLS,
+ },
+ {
+ "pkt: test3",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
+ offsetof(struct __sk_buff, data)),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access off=76",
+ .result = REJECT,
+ .prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
+ },
+ {
+ "pkt: test4",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
+ offsetof(struct __sk_buff, data)),
+ BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
+ offsetof(struct __sk_buff, data_end)),
+ BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
+ BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 1),
+ BPF_STX_MEM(BPF_B, BPF_REG_2, BPF_REG_2, 0),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "cannot write",
+ .result = REJECT,
+ .prog_type = BPF_PROG_TYPE_SCHED_CLS,
+ },
};
static int probe_filter_length(struct bpf_insn *fp)
--
2.8.0
next prev parent reply other threads:[~2016-05-06 2:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-06 2:49 [PATCH net-next 0/7] bpf: introduce direct packet access Alexei Starovoitov
2016-05-06 2:49 ` [PATCH net-next 1/7] bpf: cleanup verifier code Alexei Starovoitov
2016-05-06 2:49 ` [PATCH net-next 2/7] bpf: direct packet access Alexei Starovoitov
2016-05-06 2:49 ` [PATCH net-next 3/7] bpf: improve verifier state equivalence Alexei Starovoitov
2016-05-06 2:49 ` [PATCH net-next 4/7] bpf: wire in data and data_end for cls_act_bpf Alexei Starovoitov
2016-05-06 2:49 ` [PATCH net-next 5/7] bpf: add documentation for 'direct packet access' Alexei Starovoitov
2016-05-06 2:49 ` [PATCH net-next 6/7] samples/bpf: add 'pointer to packet' tests Alexei Starovoitov
2016-05-06 2:49 ` Alexei Starovoitov [this message]
2016-05-06 20:02 ` [PATCH net-next 0/7] bpf: introduce direct packet access David Miller
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