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From:   David Howells <dhowells@redhat.com>
To:     Jakub Kicinski <kuba@kernel.org>
cc:     dhowells@redhat.com, Ilya Dryomov <idryomov@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>, ceph-devel@vger.kernel.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Is ->sendmsg() allowed to change the msghdr struct it is given?
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Content-ID: <3112096.1687814081.1@warthog.procyon.org.uk>
Date:   Mon, 26 Jun 2023 22:14:41 +0100
Message-ID: <3112097.1687814081@warthog.procyon.org.uk>
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Hi Jakub,

Do you know if ->sendmsg() might alter the msghdr struct it is passed as an
argument?  Certainly it can alter msg_iter, but can it also modify, say,
msg_flags?

Thanks,
David