linux-kernel - Re: [PATCH v4 00/45] x86: Kernel IBT

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Date:   Fri, 11 Mar 2022 11:40:27 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     x86@...nel.org, joao@...rdrivepizza.com, hjl.tools@...il.com,
        jpoimboe@...hat.com, andrew.cooper3@...rix.com,
        linux-kernel@...r.kernel.org, ndesaulniers@...gle.com,
        keescook@...omium.org, samitolvanen@...gle.com,
        mark.rutland@....com, alyssa.milburn@...el.com, mbenes@...e.cz,
        rostedt@...dmis.org, mhiramat@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, bpf@...r.kernel.org
Subject: Re: [PATCH v4 00/45] x86: Kernel IBT

On Thu, Mar 10, 2022 at 05:29:11PM +0100, Peter Zijlstra wrote:

> This seems to cure most of the rest. I'm still seeing one failure:
> 
> libbpf: prog 'connect_v4_prog': BPF program load failed: Invalid argument
> libbpf: failed to load program 'connect_v4_prog'
> libbpf: failed to load object './connect4_prog.o'
> test_fexit_bpf2bpf_common:FAIL:tgt_prog_load unexpected error: -22 (errno 22)
> #48/4 fexit_bpf2bpf/func_replace_verify:FAIL


Hmm, with those two patches on I get:

root@...erlake:/usr/src/linux-2.6/tgl-build# ./test_progs -t fexit
#46 fentry_fexit:OK
#48 fexit_bpf2bpf:OK
#49 fexit_sleep:OK
#50 fexit_stress:OK
#51 fexit_test:OK
Summary: 5/9 PASSED, 0 SKIPPED, 0 FAILED

On the tigerlake, I suppose I'm doing something wrong on the other
machine because there it's even failing on the pre-ibt kernel image.

I'll go write up changelogs and stick these on.