netdev - Re: [PATCH net-next] ipv6: set msg_control_is_user in do_ipv6

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Message-Id: <20200513.131211.726414267223514414.davem@davemloft.net>
Date:   Wed, 13 May 2020 13:12:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     hch@....de
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next] ipv6: set msg_control_is_user in
 do_ipv6_getsockopt

From: Christoph Hellwig <hch@....de>
Date: Wed, 13 May 2020 21:36:41 +0200

> While do_ipv6_getsockopt does not call the high-level recvmsg helper,
> the msghdr eventually ends up being passed to put_cmsg anyway, and thus
> needs msg_control_is_user set to the proper value.
> 
> Fixes: 1f466e1f15cf ("net: cleanly handle kernel vs user buffers for ->msg_control")
> Reported-by: Eric Dumazet <eric.dumazet@...il.com>
> Signed-off-by: Christoph Hellwig <hch@....de>

Applied, thanks.