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    Subject[patch 03/23] : H.323 helper: fix possible NULL-ptr dereference
    -stable review patch.  If anyone has any objections, please let us know.

    ------------------
    From: Patrick McHardy <kaber@trash.net>

    [NETFILTER]: H.323 helper: fix possible NULL-ptr dereference

    An RCF message containing a timeout results in a NULL-ptr dereference if
    no RRQ has been seen before.

    Noticed by the "SATURN tool", reported by Thomas Dillig <tdillig@stanford.edu>
    and Isil Dillig <isil@stanford.edu>.

    Signed-off-by: Patrick McHardy <kaber@trash.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    net/ipv4/netfilter/ip_conntrack_helper_h323.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- linux-2.6.17.7.orig/net/ipv4/netfilter/ip_conntrack_helper_h323.c
    +++ linux-2.6.17.7/net/ipv4/netfilter/ip_conntrack_helper_h323.c
    @@ -1092,7 +1092,7 @@ static struct ip_conntrack_expect *find_
    tuple.dst.protonum = IPPROTO_TCP;

    exp = __ip_conntrack_expect_find(&tuple);
    - if (exp->master == ct)
    + if (exp && exp->master == ct)
    return exp;
    return NULL;
    }
    --
    -
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