From: Xin Long <lucien.xin@xxxxxxxxx>
Date: Fri, 12 May 2017 14:39:52 +0800
> Commit 0ca50d12fe46 ("sctp: fix src address selection if using secondary
> addresses") has fixed a src address selection issue when using secondary
> addresses for ipv4.
>
> Now sctp ipv6 also has the similar issue. When using a secondary address,
> sctp_v6_get_dst tries to choose the saddr which has the most same bits
> with the daddr by sctp_v6_addr_match_len. It may make some cases not work
> as expected.
...
> This patch is to fix it with the same way as Marcelo's fix for sctp ipv4.
> As no ip_dev_find for ipv6, this patch is to use ipv6_chk_addr to check
> if the saddr is in a dev instead.
>
> Note that for backwards compatibility, it will still do the addr_match_len
> check here when no optimal is found.
>
> Reported-by: Patrick Talbert <ptalbert@xxxxxxxxxx>
> Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
Applied and queued up for -stable, thank you.
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