linux-kernel - Re: [PATCH] nbd_genl_status: null check for nla_nest

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Message-ID: <20190729130912.7imtg3hfnvb4lt2y@MacBook-Pro-91.local>
Date:   Mon, 29 Jul 2019 09:09:13 -0400
From:   Josef Bacik <josef@...icpanda.com>
To:     Navid Emamdoost <navid.emamdoost@...il.com>
Cc:     emamd001@....edu, kjlu@....edu, smccaman@....edu,
        secalert@...hat.com, Josef Bacik <josef@...icpanda.com>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        nbd@...er.debian.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nbd_genl_status: null check for nla_nest_start

On Tue, Jul 23, 2019 at 06:01:57PM -0500, Navid Emamdoost wrote:
> nla_nest_start may fail and return NULL. The check is inserted, and
> errno is selected based on other call sites within the same source code.
> 
> Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
> ---
>  drivers/block/nbd.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
> index 9bcde2325893..dba362de4d91 100644
> --- a/drivers/block/nbd.c
> +++ b/drivers/block/nbd.c
> @@ -2149,6 +2149,12 @@ static int nbd_genl_status(struct sk_buff *skb, struct genl_info *info)
>  	}
>  
>  	dev_list = nla_nest_start_noflag(reply, NBD_ATTR_DEVICE_LIST);
> +

No newline here, once you fix that nit you can add

Reviewed-by: Josef Bacik <josef@...icpanda.com>

Thanks,

Josef