Re: [PATCH v2 5/6] sysctl/infiniband: Fixes infiniband sysctl bounds

[Zhu Yanjun <yanjun.zhu@linux.dev>]

在 2025/2/24 10:58, nicolas.bouchinet@clip-os.org 写道:
> From: Nicolas Bouchinet <nicolas.bouchinet@ssi.gouv.fr>
>
> Bound infiniband iwcm and ucma sysctl writings between SYSCTL_ZERO
> and SYSCTL_INT_MAX.
>
> The proc_handler has thus been updated to proc_dointvec_minmax.

In this commit, the minimum and maximum are added to the proc_handler.

It seems that this will not introduce any risk.

I am fine with it.

Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>

Thanks,

Zhu Yanjun

>
> Signed-off-by: Nicolas Bouchinet <nicolas.bouchinet@ssi.gouv.fr>
> ---
>   drivers/infiniband/core/iwcm.c | 4 +++-
>   drivers/infiniband/core/ucma.c | 4 +++-
>   2 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c
> index 7e3a55349e107..f4486cbd8f45a 100644
> --- a/drivers/infiniband/core/iwcm.c
> +++ b/drivers/infiniband/core/iwcm.c
> @@ -109,7 +109,9 @@ static struct ctl_table iwcm_ctl_table[] = {
>   		.data		= &default_backlog,
>   		.maxlen		= sizeof(default_backlog),
>   		.mode		= 0644,
> -		.proc_handler	= proc_dointvec,
> +		.proc_handler	= proc_dointvec_minmax,
> +		.extra1		= SYSCTL_ZERO,
> +		.extra2		= SYSCTL_INT_MAX,
>   	},
>   };
>   
> diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
> index 02f1666f3cbab..6e700b9740331 100644
> --- a/drivers/infiniband/core/ucma.c
> +++ b/drivers/infiniband/core/ucma.c
> @@ -69,7 +69,9 @@ static struct ctl_table ucma_ctl_table[] = {
>   		.data		= &max_backlog,
>   		.maxlen		= sizeof max_backlog,
>   		.mode		= 0644,
> -		.proc_handler	= proc_dointvec,
> +		.proc_handler	= proc_dointvec_minmax,
> +		.extra1		= SYSCTL_ZERO,
> +		.extra2		= SYSCTL_INT_MAX,
>   	},
>   };
>   

-- 
Best Regards,
Yanjun.Zhu