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

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Message-ID: <20220315100706.GA14330@worktop.programming.kicks-ass.net>
Date:   Tue, 15 Mar 2022 11:07:06 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kumar Kartikeya Dwivedi <memxor@...il.com>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        X86 ML <x86@...nel.org>, joao@...rdrivepizza.com,
        hjl.tools@...il.com, Josh Poimboeuf <jpoimboe@...hat.com>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Mark Rutland <mark.rutland@....com>, alyssa.milburn@...el.com,
        Miroslav Benes <mbenes@...e.cz>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH v4 00/45] x86: Kernel IBT

On Tue, Mar 15, 2022 at 10:00:43AM +0100, Peter Zijlstra wrote:
> I don't seem able to run this mod_race test, it keeps saying:
> 
>   tgl-build# ./test_progs -v -t mod_race
>   bpf_testmod.ko is already unloaded.
>   Loading bpf_testmod.ko...
>   Successfully loaded bpf_testmod.ko.
>   Summary: 0/0 PASSED, 0 SKIPPED, 0 FAILED
>   Successfully unloaded bpf_testmod.ko.
> 
> Which I'm taking to mean I'm doing it wrong... 

That.. I was building the wrong tree, mod_race comes from bpf-next and I
was building a tree without that merged in... let me to see what it does
now.