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| author |   Daniel Borkmann <daniel@iogearbox.net> | 2017-12-14 21:07:27 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2017-12-15 09:19:36 -0800 |
| commit | 87ab8194303e73af2898e9e1c8b3b9bcfe91e7a9 (patch) | |
| tree | d6536ec187e003bb6a7c87cc8acdef20e16bf6c2 /tools/testing/selftests | |
| parent | bpf, sparc: fix usage of wrong reg for load_skb_regs after call (diff) | |
| download | linux-dev-87ab8194303e73af2898e9e1c8b3b9bcfe91e7a9.tar.xz linux-dev-87ab8194303e73af2898e9e1c8b3b9bcfe91e7a9.zip | |
bpf: add test case for ld_abs and helper changing pkt data
Add a test that i) uses LD_ABS, ii) zeroing R6 before call, iii) calls
a helper that triggers reload of cached skb data, iv) uses LD_ABS again.
It's added for test_bpf in order to do runtime testing after JITing as
well as test_verifier to test that the sequence is allowed.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests')
| -rw-r--r-- | tools/testing/selftests/bpf/test_verifier.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index 3c64f30cf63c..b03ecfd7185b 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -6117,6 +6117,30 @@ static struct bpf_test tests[] = { .result = ACCEPT, }, { + "ld_abs: tests on r6 and skb data reload helper", + .insns = { + BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), + BPF_LD_ABS(BPF_B, 0), + BPF_LD_ABS(BPF_H, 0), + BPF_LD_ABS(BPF_W, 0), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_6), + BPF_MOV64_IMM(BPF_REG_6, 0), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), + BPF_MOV64_IMM(BPF_REG_2, 1), + BPF_MOV64_IMM(BPF_REG_3, 2), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + BPF_FUNC_skb_vlan_push), + BPF_MOV64_REG(BPF_REG_6, BPF_REG_7), + BPF_LD_ABS(BPF_B, 0), + BPF_LD_ABS(BPF_H, 0), + BPF_LD_ABS(BPF_W, 0), + BPF_MOV64_IMM(BPF_REG_0, 42), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + }, + { "ld_ind: check calling conv, r1", .insns = { BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), |