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ipv6: set msg_control_is_user in do_ipv6_getsockopt

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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: 1f466e1f15 ("net: cleanly handle kernel vs user buffers for ->msg_control")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-05-13 21:36:41 +02:00 committed by David S. Miller
parent 87f785e962
commit 1b2f08df0a
1 changed files with 1 additions and 0 deletions
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net/ipv6/ipv6_sockglue.c
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@ -1075,6 +1075,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
msg.msg_control = optval;
msg.msg_controllen = len;
msg.msg_flags = flags;
msg.msg_control_is_user = true;
lock_sock(sk);
skb = np->pktoptions;