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Date:   Mon, 26 Aug 2019 08:57:56 -0600
From:   Tycho Andersen <tycho@tycho.ws>
To:     Paul Walmsley <paul.walmsley@sifive.com>
Cc:     David Abdurachmanov <david.abdurachmanov@gmail.com>,
        Palmer Dabbelt <palmer@sifive.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Oleg Nesterov <oleg@redhat.com>,
        Kees Cook <keescook@chromium.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Will Drewry <wad@chromium.org>, Shuah Khan <shuah@kernel.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        David Abdurachmanov <david.abdurachmanov@sifive.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Allison Randal <allison@lohutok.net>,
        Alexios Zavras <alexios.zavras@intel.com>,
        Anup Patel <Anup.Patel@wdc.com>,
        Vincent Chen <vincentc@andestech.com>,
        Alan Kao <alankao@andestech.com>,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
        bpf@vger.kernel.org, me@carlosedp.com
Subject: Re: [PATCH v2] riscv: add support for SECCOMP and SECCOMP_FILTER
Message-ID: <20190826145756.GB4664@cisco>
References: <20190822205533.4877-1-david.abdurachmanov@sifive.com>
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Hi,

On Fri, Aug 23, 2019 at 05:30:53PM -0700, Paul Walmsley wrote:
> On Thu, 22 Aug 2019, David Abdurachmanov wrote:
> 
> > There is one failing kernel selftest: global.user_notification_signal
> 
> Also - could you follow up with the author of this failing test to see if 
> we can get some more clarity about what might be going wrong here?  It 
> appears that the failing test was added in commit 6a21cc50f0c7f ("seccomp: 
> add a return code to trap to userspace") by Tycho Andersen 
> <tycho@tycho.ws>.

Can you post an strace and a cat of /proc/$pid/stack for both tasks
where it gets stuck? I don't have any riscv hardware, and it "works
for me" on x86 and arm64 with 100 tries.

Thanks,

Tycho