• Paul Moore's avatar
    netlabel: use domain based selectors when address based selectors are not available · 6a8b7f0c
    Paul Moore authored
    NetLabel has the ability to selectively assign network security labels
    to outbound traffic based on either the LSM's "domain" (different for
    each LSM), the network destination, or a combination of both.  Depending
    on the type of traffic, local or forwarded, and the type of traffic
    selector, domain or address based, different hooks are used to label the
    traffic; the goal being minimal overhead.
    
    Unfortunately, there is a bug such that a system using NetLabel domain
    based traffic selectors does not correctly label outbound local traffic
    that is not assigned to a socket.  The issue is that in these cases
    the associated NetLabel hook only looks at the address based selectors
    and not the domain based selectors.  This patch corrects this by
    checking both the domain and address based selectors so that the correct
    labeling is applied, regardless of the configuration type.
    
    In order to acomplish this fix, this patch also simplifies some of the
    NetLabel domainhash structures to use a more common outbound traffic
    mapping type: struct netlbl_dommap_def.  This simplifies some of the code
    in this patch and paves the way for further simplifications in the
    future.
    Signed-off-by: default avatarPaul Moore <pmoore@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    6a8b7f0c
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