linux-kernel - Re: [PATCH] netfilter: nf_tables: Modify nla_memdup's flag to GFP_KERNEL

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Date:   Thu, 6 Apr 2023 11:21:50 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Chen Aotian <chenaotian2@....com>
Cc:     kadlec@...filter.org, fw@...len.de, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netfilter: nf_tables: Modify nla_memdup's flag to
 GFP_KERNEL_ACCOUNT

On Thu, Apr 06, 2023 at 12:01:51PM +0800, Chen Aotian wrote:
> For memory alloc that store user data from nla[NFTA_OBJ_USERDATA], 
> use GFP_KERNEL_ACCOUNT is more suitable.
>

Fixes: 33758c891479 ("memcg: enable accounting for nft objects")

> Signed-off-by: Chen Aotian <chenaotian2@....com>
> ---
>  net/netfilter/nf_tables_api.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
> index 6004d4b24..cd52109e6 100644
> --- a/net/netfilter/nf_tables_api.c
> +++ b/net/netfilter/nf_tables_api.c
> @@ -7052,7 +7052,7 @@ static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
>  	}
>  
>  	if (nla[NFTA_OBJ_USERDATA]) {
> -		obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL);
> +		obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
>  		if (obj->udata == NULL)
>  			goto err_userdata;
>  
> -- 
> 2.25.1
>