linux-kernel - Re: [PATCH 4/9] sysctl: move maxolduid as a sysctl specific const

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Message-ID: <9281f237-3b26-f828-c4bd-2f039174be7f@digikod.net>
Date:   Thu, 30 Dec 2021 12:24:29 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Luis Chamberlain <mcgrof@...nel.org>
Cc:     viro@...iv.linux.org.uk, keescook@...omium.org, yzaikin@...gle.com,
        nixiaoming@...wei.com, ebiederm@...ssion.com, steve@....org,
        andriy.shevchenko@...ux.intel.com, jlayton@...nel.org,
        bfields@...ldses.org, Stephen Rothwell <sfr@...b.auug.org.au>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/9] sysctl: move maxolduid as a sysctl specific const



On 30/12/2021 01:46, Andrew Morton wrote:
> On Mon, 20 Dec 2021 11:25:41 -0800 Luis Chamberlain <mcgrof@...nel.org> wrote:
> 
>> On Fri, Dec 17, 2021 at 05:15:01PM +0100, Mickaël Salaün wrote:
>>>> diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
>>>> index 7dec3d5a9ed4..675b625fa898 100644
>>>> --- a/fs/proc/proc_sysctl.c
>>>> +++ b/fs/proc/proc_sysctl.c
>>>> @@ -26,7 +26,7 @@ static const struct file_operations proc_sys_dir_file_operations;
>>>>    static const struct inode_operations proc_sys_dir_operations;
>>>>    /* shared constants to be used in various sysctls */
>>>> -const int sysctl_vals[] = { -1, 0, 1, 2, 4, 100, 200, 1000, 3000, INT_MAX };
>>>> +const int sysctl_vals[] = { -1, 0, 1, 2, 4, 100, 200, 1000, 65535, INT_MAX };
>>>
>>> The new SYSCTL_MAXOLDUID uses the index 10 of sysctl_vals[] but the same
>>> commit replaces index 8 (SYSCTL_THREE_THOUSAND used by
>>> vm.watermark_scale_factor) instead of adding a new entry.
>>>
>>> It should be:
>>> +const int sysctl_vals[] = { -1, 0, 1, 2, 4, 100, 200, 1000, 3000, INT_MAX,
>>> 65535 };
>>
>> Can you send a proper patch which properly fixes this and identifies
>> the commit name with a Fixes tag. Since thi sis on Andrew's tree no
>> commit ID is required given that they are ephemeral.
> 
> I did this:
> 
> From: Andrew Morton <akpm@...ux-foundation.org>
> Subject: sysctl-move-maxolduid-as-a-sysctl-specific-const-fix
> 
> fix sysctl_vals[], per Mickaël.
> 
> Cc: Mickaël Salaün <mic@...ikonet>

Except a typo in my email

Signed-off-by: Mickaël Salaün <mic@...ikod.net>

Thanks!

> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Cc: Antti Palosaari <crope@....fi>
> Cc: Eric Biederman <ebiederm@...ssion.com>
> Cc: Iurii Zaikin <yzaikin@...gle.com>
> Cc: "J. Bruce Fields" <bfields@...ldses.org>
> Cc: Jeff Layton <jlayton@...nel.org>
> Cc: Kees Cook <keescook@...omium.org>
> Cc: Luis Chamberlain <mcgrof@...nel.org>
> Cc: Lukas Middendorf <kernel@...force.de>
> Cc: Stephen Kitt <steve@....org>
> Cc: Xiaoming Ni <nixiaoming@...wei.com>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> ---
> 
>   fs/proc/proc_sysctl.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- a/fs/proc/proc_sysctl.c~sysctl-move-maxolduid-as-a-sysctl-specific-const-fix
> +++ a/fs/proc/proc_sysctl.c
> @@ -26,7 +26,7 @@ static const struct file_operations proc
>   static const struct inode_operations proc_sys_dir_operations;
>   
>   /* shared constants to be used in various sysctls */
> -const int sysctl_vals[] = { -1, 0, 1, 2, 4, 100, 200, 1000, 65535, INT_MAX };
> +const int sysctl_vals[] = { -1, 0, 1, 2, 4, 100, 200, 1000, 3000, INT_MAX, 65535 };
>   EXPORT_SYMBOL(sysctl_vals);
>   
>   const unsigned long sysctl_long_vals[] = { 0, 1, LONG_MAX };
> _
>