linux-kernel - Re: [PATCH net] genetlink: fix genlmsg

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Message-Id: <20171116.105003.36292605113021036.davem@davemloft.net>
Date:   Thu, 16 Nov 2017 10:50:03 +0900 (KST)
From:   David Miller <davem@...emloft.net>
To:     mkubecek@...e.cz
Cc:     johannes@...solutions.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] genetlink: fix genlmsg_nlhdr()

From: Michal Kubecek <mkubecek@...e.cz>
Date: Wed, 15 Nov 2017 13:09:32 +0100 (CET)

> According to the description, first argument of genlmsg_nlhdr() points to
> what genlmsg_put() returns, i.e. beginning of user header. Therefore we
> should only subtract size of genetlink header and netlink message header,
> not user header.
> 
> This also means we don't need to pass the pointer to genetlink family and
> the same is true for genl_dump_check_consistent() which is the only caller
> of genlmsg_nlhdr(). (Note that at the moment, these functions are only
> used for families which do not have user header so that they are not
> affected.)
> 
> Fixes: 670dc2833d14 ("netlink: advertise incomplete dumps")
> Signed-off-by: Michal Kubecek <mkubecek@...e.cz>

Applied.