linux-kernel - Re: [PATCH] alpha: osf_sys: reduce kernel log spamming on invalid osf

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Message-ID: <CAEdQ38GpkM8mZJ2oiADjCgKfEmavCrq9mcYErqPf-CHvWZX84g@mail.gmail.com>
Date:   Sat, 25 Feb 2023 21:09:02 -0500
From:   Matt Turner <mattst88@...il.com>
To:     Colin Ian King <colin.i.king@...il.com>
Cc:     Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        linux-alpha@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] alpha: osf_sys: reduce kernel log spamming on invalid
 osf_mount call typenr

On Mon, Dec 13, 2021 at 10:58 PM Colin Ian King <colin.i.king@...il.com> wrote:
>
> Calling the osf_mount system call with an invalid typenr value will
> spam the kernel log with error messages. Reduce the spamming by making
> it a ratelimited printk.  Issue found when exercising with the stress-ng
> enosys system call stressor.
>
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>
> ---
>  arch/alpha/kernel/osf_sys.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
> index 8bbeebb73cf0..2367a385d726 100644
> --- a/arch/alpha/kernel/osf_sys.c
> +++ b/arch/alpha/kernel/osf_sys.c
> @@ -521,7 +521,7 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
>                 break;
>         default:
>                 retval = -EINVAL;
> -               printk("osf_mount(%ld, %x)\n", typenr, flag);
> +               printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag);
>         }
>
>         return retval;
> --
> 2.33.1
>

Thanks for the patch! This was included in my pull request today and
is now upstream in Linus' tree.