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List:       linux-man
Subject:    Re: [PATCH v2] init_module.2: Add ETXTBSY error for finit_module
From:       "Alejandro Colomar (man-pages)" <alx.manpages () gmail ! com>
Date:       2021-11-23 11:07:03
Message-ID: cce23bd2-a320-5ab6-4e7d-7365b3917a1a () gmail ! com
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Hi Yang,

On 11/23/21 01:59, Yang Xu wrote:
> Since kernel commit[1], finit_module fails with ETXTBSY error if fd has write permission.
> Since kernel commit[2], finit_module fails with EBADF error if fd doesn't have read permission.
> 
> So we can use read-write permission to trigger ETXTBSY error all the time since linux 4.7.
> 
> [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=39d637af
> [2]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=032146cd
> 
> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>

Patch applied.

Thanks,
Alex

> ---
>   man2/init_module.2 | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/man2/init_module.2 b/man2/init_module.2
> index aac0c6631..77cd8c4a6 100644
> --- a/man2/init_module.2
> +++ b/man2/init_module.2
> @@ -242,6 +242,12 @@ is invalid.
>   .B ENOEXEC
>   .I fd
>   does not refer to an open file.
> +.TP
> +.BR ETXTBSY " (since Linux 4.7)"
> +.\" commit 39d637af5aa7577f655c58b9e55587566c63a0af
> +The file referred to by
> +.I fd
> +is opened for read-write.
>   .PP
>   In addition to the above errors, if the module's
>   .I init
> 

-- 
Alejandro Colomar
Linux man-pages comaintainer; http://www.kernel.org/doc/man-pages/
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