Re: [PATCH 3/3] tty: ldsic: fix tty_ldisc_autoload sysctl's proc_handler

[Lin Feng]

Thanks!

Reviewed-by: Lin Feng <linf@xxxxxxxxxx>

On 11/12/24 21:13, nicolas.bouchinet@xxxxxxxxxxx wrote:
> From: Nicolas Bouchinet <nicolas.bouchinet@xxxxxxxxxxx>
> 
> Commit 7c0cca7c847e ("tty: ldisc: add sysctl to prevent autoloading of
> ldiscs") introduces the tty_ldisc_autoload sysctl with the wrong
> proc_handler. .extra1 and .extra2 parameters are set to avoid other values
> thant SYSCTL_ZERO or SYSCTL_ONE to be set but proc_dointvec do not uses
> them.
> 
> This commit fixes this by using proc_dointvec_minmax instead of
> proc_dointvec.
> 
> Fixes: 7c0cca7c847e ("tty: ldisc: add sysctl to prevent autoloading of ldiscs")
> Signed-off-by: Nicolas Bouchinet <nicolas.bouchinet@xxxxxxxxxxx>
> ---
>  drivers/tty/tty_io.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
> index 407b0d87b7c10..f211154367420 100644
> --- a/drivers/tty/tty_io.c
> +++ b/drivers/tty/tty_io.c
> @@ -3631,7 +3631,7 @@ static struct ctl_table tty_table[] = {
>  		.data		= &tty_ldisc_autoload,
>  		.maxlen		= sizeof(tty_ldisc_autoload),
>  		.mode		= 0644,
> -		.proc_handler	= proc_dointvec,
> +		.proc_handler	= proc_dointvec_minmax,
>  		.extra1		= SYSCTL_ZERO,
>  		.extra2		= SYSCTL_ONE,
>  	},