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Date:	Mon, 16 Sep 2013 21:40:54 -0400 (EDT)
From:	David Miller <>
Subject: Re: [PATCH net] net: sctp: rfc4443: do not report ICMP redirects
 to user space

From: Daniel Borkmann <>
Date: Mon, 16 Sep 2013 12:36:02 +0200

> Adapt the same behaviour for SCTP as present in TCP for ICMP redirect
> messages. For IPv6, RFC4443, section 2.4. says:
>   ...
>   (e) An ICMPv6 error message MUST NOT be originated as a result of
>       receiving the following:
>   ...
>        (e.2) An ICMPv6 redirect message [IPv6-DISC].
>   ...
> Therefore, do not report an error to user space, just invoke dst's redirect
> callback and leave, same for IPv4 as done in TCP as well. The implication
> w/o having this patch could be that the reception of such packets would
> generate a poll notification and in worst case it could even tear down the
> whole connection. Therefore, stop updating sk_err on redirects.
> Reported-by: Duan Jiong <>
> Reported-by: Hannes Frederic Sowa <>
> Suggested-by: Vlad Yasevich <>
> Signed-off-by: Daniel Borkmann <>

Applied and queued up for -stable, thanks Daniel.
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