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    Subject[PATCH 4.9 13/94] sctp: do not inherit ipv6_{mc|ac|fl}_list from parent
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Eric Dumazet <edumazet@google.com>


    [ Upstream commit fdcee2cbb8438702ea1b328fb6e0ac5e9a40c7f8 ]

    SCTP needs fixes similar to 83eaddab4378 ("ipv6/dccp: do not inherit
    ipv6_mc_list from parent"), otherwise bad things can happen.

    Signed-off-by: Eric Dumazet <edumazet@google.com>
    Reported-by: Andrey Konovalov <andreyknvl@google.com>
    Tested-by: Andrey Konovalov <andreyknvl@google.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/sctp/ipv6.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/net/sctp/ipv6.c
    +++ b/net/sctp/ipv6.c
    @@ -678,6 +678,9 @@ static struct sock *sctp_v6_create_accep
    newnp = inet6_sk(newsk);

    memcpy(newnp, np, sizeof(struct ipv6_pinfo));
    + newnp->ipv6_mc_list = NULL;
    + newnp->ipv6_ac_list = NULL;
    + newnp->ipv6_fl_list = NULL;

    rcu_read_lock();
    opt = rcu_dereference(np->opt);

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