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net/sock: allow the user to set negative peek offset

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This is necessary to allow the user to disable peeking with
offset once it's enabled.
Unix sockets already allow the above, with this patch we
permit it for udp[6] sockets, too.

Fixes: 627d2d6b55 ("udp: enable MSG_PEEK at non-zero offset")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2017-08-23 11:57:51 +02:00 • committed by David S. Miller
parent 110d8465a6
commit 257a73031d
1 changed files with 0 additions and 3 deletions
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3
net/core/sock.c
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@ -2454,9 +2454,6 @@ EXPORT_SYMBOL(__sk_mem_reclaim);
int sk_set_peek_off(struct sock *sk, int val)
{
if (val < 0)
return -EINVAL;
sk->sk_peek_off = val;
return 0;
}