linux-kernel - Re: [PATCH] riscv: reject invalid syscalls below -1

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Date:   Fri, 27 Dec 2019 22:02:54 -0800 (PST)
From:   Paul Walmsley <paul.walmsley@...ive.com>
To:     David Abdurachmanov <david.abdurachmanov@...il.com>
cc:     Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        David Abdurachmanov <david.abdurachmanov@...ive.com>,
        Kees Cook <keescook@...omium.org>,
        Anup Patel <Anup.Patel@....com>,
        Vincent Chen <vincent.chen@...ive.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Bin Meng <bmeng.cn@...il.com>, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: reject invalid syscalls below -1

On Wed, 18 Dec 2019, David Abdurachmanov wrote:

> Running "stress-ng --enosys 4 -t 20 -v" showed a large number of kernel oops
> with "Unable to handle kernel paging request at virtual address" message. This
> happens when enosys stressor starts testing random non-valid syscalls.
> 
> I forgot to redirect any syscall below -1 to sys_ni_syscall.
> 
> With the patch kernel oops messages are gone while running stress-ng enosys
> stressor.
> 
> Signed-off-by: David Abdurachmanov <david.abdurachmanov@...ive.com>
> Fixes: 5340627e3fe0 ("riscv: add support for SECCOMP and SECCOMP_FILTER")

>From the thread, I couldn't tell whether you were happy with this patch as 
it stands or not; the thread seems to have petered out.  So this one has 
been queued for v5.5-rc; let me know if you didn't intend for that to 
happen.


- Paul