On Wed, Aug 28, 2019 at 4:43 PM Joshua Brindle <joshua.brindle@xxxxxxxxxxxxxxx> wrote: > > A policy developer can now specify glblub as a default_range default and > the computed transition will be the intersection of the mls range of > the two contexts. > > The glb (greatest lower bound) lub (lowest upper bound) of a range is calculated > as the greater of the low sensitivities and the lower of the high sensitivities > and the and of each category bitmap. > > This can be used by MLS solution developers to compute a context that satisfies, > for example, the range of a network interface and the range of a user logging in. > > Some examples are: > > User Permitted Range | Network Device Label | Computed Label > ---------------------|----------------------|---------------- > S0-S1:c0.c12 | S0 | S0 > S0-S1:c0.c12 | S0-S1:c0.c1024 | S0-S1:c0.c12 > S0-S4:c0.c512 | S1-S1:c0.c1024 | S1-S1:c0.c512 > S0-S16:c0,c2 | S4-S6:c0.c128 | S4-S6:c0,c2 > S0-S4 | S2-S6 | S2-S4 > S0-S4 | S5-S8 | INVALID > S5-S8 | S0-S4 | INVALID > S6:c0,c2-S7:c4,c5 | S0:c2,c4-S6:c5.c100 | S6:c2-S6:c5 > > Signed-off-by: Joshua Brindle <joshua.brindle@xxxxxxxxxxxxxxx> > --- > security/selinux/include/security.h | 3 ++- > security/selinux/ss/context.h | 28 ++++++++++++++++++++++++++++ > security/selinux/ss/ebitmap.c | 18 ++++++++++++++++++ > security/selinux/ss/ebitmap.h | 1 + > security/selinux/ss/mls.c | 2 ++ > security/selinux/ss/policydb.c | 5 +++++ > security/selinux/ss/policydb.h | 1 + > 7 files changed, 57 insertions(+), 1 deletion(-) You incorporated some feedback from the v1 patch, but you ignored some, can you explain why? For reference, here are my comments on your first patch: * https://lore.kernel.org/selinux/CAHC9VhRXyRDjj3KJDHvA4ruJg6H+1kzFPzfA-PLZ-NqBicsLrw@xxxxxxxxxxxxxx/ -- paul moore www.paul-moore.com
