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    Subject[2.6.22.2 review 08/84] SCTP scope_id handling fix
    From: Vlad Yasevich <vladislav.yasevich@hp.com>

    SCTP: Add scope_id validation for link-local binds

    SCTP currently permits users to bind to link-local addresses,
    but doesn't verify that the scope id specified at bind matches
    the interface that the address is configured on. It was report
    that this can hang a system.

    Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    net/sctp/ipv6.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/net/sctp/ipv6.c
    +++ b/net/sctp/ipv6.c
    @@ -875,6 +875,10 @@ static int sctp_inet6_send_verify(struct
    dev = dev_get_by_index(addr->v6.sin6_scope_id);
    if (!dev)
    return 0;
    + if (!ipv6_chk_addr(&addr->v6.sin6_addr, dev, 0)) {
    + dev_put(dev);
    + return 0;
    + }
    dev_put(dev);
    }
    af = opt->pf->af;
    --
    -
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