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List:       linux-man
Subject:    Re: [PATCH] userfaultfd.2: add EPERM error
From:       "Michael Kerrisk (man-pages)" <mtk.manpages () gmail ! com>
Date:       2020-01-21 21:05:36
Message-ID: 4c28c97f-2c81-c915-2615-a5d69a3e592a () gmail ! com
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On 12/18/19 7:13 AM, Yang Xu wrote:
> Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
> ---
>  man2/userfaultfd.2 | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/man2/userfaultfd.2 b/man2/userfaultfd.2
> index 8d0a66ed9..2b432f043 100644
> --- a/man2/userfaultfd.2
> +++ b/man2/userfaultfd.2
> @@ -440,6 +440,11 @@ reached.
>  .TP
>  .B ENOMEM
>  Insufficient kernel memory was available.
> +.TP
> +.B EPERM
> +Unprivileged user(without SYS_CAP_PTRACE capability) uses this call when
> +set unprivileged_userfaultfd to 0. It was introduced since Linux 5.2.
> +.\" cefdca0a86be517bc390fc4541e3674b8e7803b0
>  .SH VERSIONS
>  The
>  .BR userfaultfd ()

Hello Yang Xu,

Thanks. Patch applied (with some tweaks).

Cheers,

Michael



-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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