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bpf: sk_msg, add tests for size field

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This adds tests to read the size field to test_verifier.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
John Fastabend 2018-12-16 15:47:06 -08:00 committed by Daniel Borkmann
parent 584e46813e
commit 945a47d87c
1 changed files with 13 additions and 3 deletions
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16
tools/testing/selftests/bpf/test_verifier.c
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@ -1843,10 +1843,20 @@ static struct bpf_test tests[] = {
.prog_type = BPF_PROG_TYPE_SK_SKB, .prog_type = BPF_PROG_TYPE_SK_SKB,
}, },
{ {
"invalid 64B read of family in SK_MSG", "valid access size in SK_MSG",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct sk_msg_md, size)),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_SK_MSG,
},
{
"invalid 64B read of size in SK_MSG",
.insns = { .insns = {
BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1, BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1,
offsetof(struct sk_msg_md, family)), offsetof(struct sk_msg_md, size)),
BPF_EXIT_INSN(), BPF_EXIT_INSN(),
}, },
.errstr = "invalid bpf_context access", .errstr = "invalid bpf_context access",
@ -1857,7 +1867,7 @@ static struct bpf_test tests[] = {
"invalid read past end of SK_MSG", "invalid read past end of SK_MSG",
.insns = { .insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct sk_msg_md, local_port) + 4), offsetof(struct sk_msg_md, size) + 4),
BPF_EXIT_INSN(), BPF_EXIT_INSN(),
}, },
.errstr = "R0 !read_ok", .errstr = "R0 !read_ok",