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Subject: Re: [PATCH v2] netfilter: account ebt_table_info to kmemcg
To:     Michal Hocko <mhocko@kernel.org>
Cc:     Shakeel Butt <shakeelb@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Florian Westphal <fw@strlen.de>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        syzbot+7713f3aa67be76b1552c@syzkaller.appspotmail.com,
        Pablo Neira Ayuso <pablo@netfilter.org>,
        Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>,
        Roopa Prabhu <roopa@cumulusnetworks.com>,
        Nikolay Aleksandrov <nikolay@cumulusnetworks.com>,
        netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
        bridge@lists.linux-foundation.org
References: <20190103031431.247970-1-shakeelb@google.com>
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 <2d8f28cb-8620-be05-21bc-dcf3009b2774@virtuozzo.com>
 <20190110094142.GI31793@dhcp22.suse.cz>
From:   Kirill Tkhai <ktkhai@virtuozzo.com>
Message-ID: <4c8051dd-2214-49eb-a342-5ee2171665d1@virtuozzo.com>
Date:   Thu, 10 Jan 2019 12:48:17 +0300
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On 10.01.2019 12:41, Michal Hocko wrote:
> On Thu 10-01-19 12:22:09, Kirill Tkhai wrote:
> [...]
>>>> diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
>>>> index 491828713e0b..5e55cef0cec3 100644
>>>> --- a/net/bridge/netfilter/ebtables.c
>>>> +++ b/net/bridge/netfilter/ebtables.c
>>>> @@ -1137,14 +1137,16 @@ static int do_replace(struct net *net, const void __user *user,
>>>>  	tmp.name[sizeof(tmp.name) - 1] = 0;
>>>>  
>>>>  	countersize = COUNTER_OFFSET(tmp.nentries) * nr_cpu_ids;
>>>> -	newinfo = vmalloc(sizeof(*newinfo) + countersize);
>>>> +	newinfo = __vmalloc(sizeof(*newinfo) + countersize, GFP_KERNEL_ACCOUNT,
>>>> +			    PAGE_KERNEL);
>>
>> Do we need GFP_HIGHMEM here?
> 
> No. vmalloc adds __GPF_HIGHMEM implicitly (see __vmalloc_area_node).

Then OK, thanks for the explanation.

Kirill