25ce102907
It seems validatetrans support was never added to libselinux, despite being added to selinuxfs in kernel version 4.5 There is a utility to test, however the targeted policy has no validatetrans rules so some must be added: $ cat validatetrans.cil (mlsvalidatetrans db_table (and (or (or (or (eq l1 l2) (and (eq t3 unconfined_t) (domby l1 l2))) (and (eq t3 unconfined_t) (dom l1 l2))) (and (eq t3 unconfined_t) (incomp l1 l2))) (or (or (or (eq l1 h2) (and (eq t3 unconfined_t) (domby h1 h2))) (and (eq t3 unconfined_t) (dom h1 h2))) (and (eq t3 unconfined_t) (incomp h1 h2))))) $ sudo semodule -i validatetrans.cil $ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r: # invalid context here opening /sys/fs/selinux/validatetrans security_validatetrans returned -1 errno: Invalid argument $ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r:init_t:s0 opening /sys/fs/selinux/validatetrans security_validatetrans returned -1 errno: Operation not permitted $ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r:unconfined_t:s0 opening /sys/fs/selinux/validatetrans security_validatetrans returned 0 errno: Success Signed-off-by: Joshua Brindle <joshua.brindle@crunchydata.com> |
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