netdev - do a single memdup_user in sctp

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Message-Id: <20200521174724.2635475-1-hch@lst.de>
Date:   Thu, 21 May 2020 19:46:35 +0200
From:   Christoph Hellwig <hch@....de>
To:     Vlad Yasevich <vyasevich@...il.com>,
        Neil Horman <nhorman@...driver.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        David Laight <David.Laight@...LAB.COM>,
        linux-sctp@...r.kernel.org, netdev@...r.kernel.org
Subject: do a single memdup_user in sctp_setsockopt

Hi all,

based on the review of Davids patch to do something similar I dusted off
the series I had started a few days ago to move the memdup_user or
copy_from_user from the inidividual sockopts into sctp_setsockopt,
which is done with one patch per option, so it might suit Marcelo's
taste a bit better.  I did not start any work on getsockopt.