On Tue, Oct 06, 2020 at 06:23:13PM -0700, Hao Luo wrote:
> Commit 4976b718c355 ("bpf: Introduce pseudo_btf_id") switched
> the order of check_subprogs() and resolve_pseudo_ldimm() in
> the verifier. Now an empty prog expects to see the error "last
> insn is not an the prog of a single invalid ldimm exit or jmp"
> instead, because the check for subprogs comes first. It's now
> pointless to validate that half of ldimm64 won't be the last
> instruction.
>
> Tested:
> # ./test_verifier
> Summary: 1129 PASSED, 537 SKIPPED, 0 FAILED
> and the full set of bpf selftests.
>
> Fixes: 4976b718c355 ("bpf: Introduce pseudo_btf_id")
> Signed-off-by: Hao Luo <haoluo@xxxxxxxxxx>
> ---
> Changelog in v2:
> - Remove the original test_verifier ld_imm64 test4
> - Updated commit message.
>
> tools/testing/selftests/bpf/verifier/basic.c | 2 +-
> .../testing/selftests/bpf/verifier/ld_imm64.c | 24 +++++++------------
> 2 files changed, 9 insertions(+), 17 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/verifier/basic.c b/tools/testing/selftests/bpf/verifier/basic.c
> index b8d18642653a..de84f0d57082 100644
> --- a/tools/testing/selftests/bpf/verifier/basic.c
> +++ b/tools/testing/selftests/bpf/verifier/basic.c
> @@ -2,7 +2,7 @@
> "empty prog",
> .insns = {
> },
> - .errstr = "unknown opcode 00",
> + .errstr = "last insn is not an exit or jmp",
> .result = REJECT,
> },
> {
> diff --git a/tools/testing/selftests/bpf/verifier/ld_imm64.c b/tools/testing/selftests/bpf/verifier/ld_imm64.c
> index 3856dba733e9..ed6a34991216 100644
> --- a/tools/testing/selftests/bpf/verifier/ld_imm64.c
> +++ b/tools/testing/selftests/bpf/verifier/ld_imm64.c
> @@ -54,21 +54,13 @@
> "test5 ld_imm64",
> .insns = {
> BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
> - },
> - .errstr = "invalid bpf_ld_imm64 insn",
> - .result = REJECT,
> -},
> -{
> - "test6 ld_imm64",
> - .insns = {
> - BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0),
> BPF_RAW_INSN(0, 0, 0, 0, 0),
> BPF_EXIT_INSN(),
> },
> .result = ACCEPT,
> },
> {
> - "test7 ld_imm64",
> + "test6 ld_imm64",
> .insns = {
> BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 1),
> BPF_RAW_INSN(0, 0, 0, 0, 1),
> @@ -78,7 +70,7 @@
> .retval = 1,
> },
> {
> - "test8 ld_imm64",
> + "test7 ld_imm64",
imo that's too much churn to rename all of them.
Just delete one.
