netdev - Re: [PATCH 0/5 net] bridge: Fix missing Netlink message validations

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Date:	Sat, 29 Nov 2014 09:51:42 -0800
From:	John Fastabend <john.fastabend@...il.com>
To:	Thomas Graf <tgraf@...g.ch>
CC:	Jiri Pirko <jiri@...nulli.us>, davem@...emloft.net,
	stephen@...workplumber.org, netdev@...r.kernel.org
Subject: Re: [PATCH 0/5 net] bridge: Fix missing Netlink message validations

On 11/26/2014 03:14 PM, Thomas Graf wrote:
> On 11/26/14 at 09:25am, John Fastabend wrote:
>>> --- a/net/ipv4/devinet.c
>>> +++ b/net/ipv4/devinet.c
>>> @@ -1687,8 +1687,11 @@ static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla)
>>>                 BUG();
>>>
>>>         if (tb[IFLA_INET_CONF]) {
>>> -               nla_for_each_nested(a, tb[IFLA_INET_CONF], rem)
>>> +               nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) {
>>> +                       if (nla_len(a) < sizeof(u32))
>>> +                               return -EINVAL;
>>>                         ipv4_devconf_set(in_dev, nla_type(a), nla_get_u32(a));
>>> +               }
>
> Looked into this and found a validation function
> inet_validate_link_af(). It's split to keep the updates atomic.
>

Ah great thanks.

-- 
John Fastabend         Intel Corporation
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