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From:   Andreas Schwab <schwab@linux-m68k.org>
To:     Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
Cc:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        Alexander Potapenko <glider@google.com>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>,
        Luke Nelson <luke.r.nels@gmail.com>,
        Xi Wang <xi.wang@gmail.com>, linux-riscv@lists.infradead.org,
        linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
        netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [PATCH 7/9] riscv: bpf: Avoid breaking W^X
References: <20210330022144.150edc6e@xhacker>
        <20210330022521.2a904a8c@xhacker> <87o8ccqypw.fsf@igel.home>
        <20210612002334.6af72545@xhacker>
Date:   Fri, 11 Jun 2021 18:41:16 +0200
In-Reply-To: <20210612002334.6af72545@xhacker> (Jisheng Zhang's message of
        "Sat, 12 Jun 2021 00:23:34 +0800")
Message-ID: <87bl8cqrpv.fsf@igel.home>
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On Jun 12 2021, Jisheng Zhang wrote:

> I reproduced an kernel panic with the defconfig on qemu, but I'm not sure whether
> this is the issue you saw, I will check.
>
>     0.161959] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
> [    0.167028] pinctrl core: initialized pinctrl subsystem
> [    0.190727] Unable to handle kernel paging request at virtual address ffffffff81651bd8
> [    0.191361] Oops [#1]
> [    0.191509] Modules linked in:
> [    0.191814] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.13.0-rc5-default+ #3
> [    0.192179] Hardware name: riscv-virtio,qemu (DT)
> [    0.192492] epc : __memset+0xc4/0xfc
> [    0.192712]  ra : skb_flow_dissector_init+0x22/0x86

Yes, that's the same.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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