From: Daniel Borkmann daniel@iogearbox.net
commit 973377ffe8148180b2651825b92ae91988141b05 upstream.
In almost all cases from test_verifier that have been changed in here, we've had an unreachable path with a load from a register which has an invalid address on purpose. This was basically to make sure that we never walk this path and to have the verifier complain if it would otherwise. Change it to match on the right error for unprivileged given we now test these paths under speculative execution.
There's one case where we match on exact # of insns_processed. Due to the extra path, this will of course mismatch on unprivileged. Thus, restrict the test->insn_processed check to privileged-only.
In one other case, we result in a 'pointer comparison prohibited' error. This is similarly due to verifying an 'invalid' branch where we end up with a value pointer on one side of the comparison.
Signed-off-by: Daniel Borkmann daniel@iogearbox.net Reviewed-by: John Fastabend john.fastabend@gmail.com Acked-by: Alexei Starovoitov ast@kernel.org [OP: ignore changes to tests that do not exist in 4.19] Signed-off-by: Ovidiu Panait ovidiu.panait@windriver.com --- tools/testing/selftests/bpf/test_verifier.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index b44324530948..c7d17781dbfe 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -2792,6 +2792,8 @@ static struct bpf_test tests[] = { BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0), BPF_EXIT_INSN(), }, + .errstr_unpriv = "R7 invalid mem access 'inv'", + .result_unpriv = REJECT, .result = ACCEPT, .retval = 0, },