Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Sat, 12 Mar 2022 16:44:07 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc:     X86 ML <x86@kernel.org>, joao@overdrivepizza.com,
        hjl.tools@gmail.com, Josh Poimboeuf <jpoimboe@redhat.com>,
        Andrew Cooper <andrew.cooper3@citrix.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Kees Cook <keescook@chromium.org>,
        Sami Tolvanen <samitolvanen@google.com>,
        Mark Rutland <mark.rutland@arm.com>, alyssa.milburn@intel.com,
        Miroslav Benes <mbenes@suse.cz>,
        Steven Rostedt <rostedt@goodmis.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>, bpf <bpf@vger.kernel.org>
Subject: Re: [PATCH v4 00/45] x86: Kernel IBT
Message-ID: <20220312154407.GF28057@worktop.programming.kicks-ass.net>
References: <20220308200052.rpr4vkxppnxguirg@ast-mbp.dhcp.thefacebook.com>
 <YifSIDAJ/ZBKJWrn@hirez.programming.kicks-ass.net>
 <YifZhUVoHLT/76fE@hirez.programming.kicks-ass.net>
 <Yif8nO2xg6QnVQfD@hirez.programming.kicks-ass.net>
 <20220309190917.w3tq72alughslanq@ast-mbp.dhcp.thefacebook.com>
 <YinGZObp37b27LjK@hirez.programming.kicks-ass.net>
 <YioBZmicMj7aAlLf@hirez.programming.kicks-ass.net>
 <YionV0+v/cUBiOh0@hirez.programming.kicks-ass.net>
 <YisnG9lW6kp8lBp3@hirez.programming.kicks-ass.net>
 <CAADnVQJfffD9tH_cWThktCCwXeoRV1XLZq69rKK5vKy_y6BN8A@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAADnVQJfffD9tH_cWThktCCwXeoRV1XLZq69rKK5vKy_y6BN8A@mail.gmail.com>
Precedence: bulk

On Fri, Mar 11, 2022 at 09:09:38AM -0800, Alexei Starovoitov wrote:
> On Fri, Mar 11, 2022 at 2:40 AM Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > 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@tigerlake:/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.
> 
> What is the latest branch I can use to test it?

  git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/ibt

that also include bpf-next. Thanks!