Date: Thu, 31 Jul 2003 12:58:26 -0700 (PDT) From: Robert Watson <rwatson@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 35282 for review Message-ID: <200307311958.h6VJwQtw001075@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=35282 Change 35282 by rwatson@rwatson_tislabs on 2003/07/31 12:58:23 Improve consistency with the Biba policy -- rename mac_mls_subject_equal_ok() to mac_mls_subject_privileged(), which more consistently reflects the fact that this is really about our notion of privilege in the MLS policy. Since we don't use suser() for privilege in MLS, remove the suser check from the ifnet relabel ioctl, and replace it with an MLS privilege check. Affected files ... .. //depot/projects/trustedbsd/mac/sys/security/mac_mls/mac_mls.c#175 edit Differences ... ==== //depot/projects/trustedbsd/mac/sys/security/mac_mls/mac_mls.c#175 (text+ko) ==== @@ -286,11 +286,12 @@ } static int -mac_mls_subject_equal_ok(struct mac_mls *mac_mls) +mac_mls_subject_privileged(struct mac_mls *mac_mls) { - KASSERT((mac_mls->mm_flags & MAC_MLS_FLAGS_BOTH) == MAC_MLS_FLAGS_BOTH, - ("mac_mls_subject_equal_ok: subject doesn't have both labels")); + KASSERT((mac_mls->mm_flags & MAC_MLS_FLAGS_BOTH) == + MAC_MLS_FLAGS_BOTH, + ("mac_mls_subject_privileged: subject doesn't have both labels")); /* If the single is EQUAL, it's ok. */ if (mac_mls->mm_single.mme_type == MAC_MLS_TYPE_EQUAL) @@ -1434,7 +1435,7 @@ * their label. */ if (mac_mls_contains_equal(new)) { - error = mac_mls_subject_equal_ok(subj); + error = mac_mls_subject_privileged(subj); if (error) return (error); } @@ -1480,23 +1481,9 @@ return (error); /* - * If the MLS label is to be changed, authorize as appropriate. + * Relabeling network interfaces requires MLS privilege. */ - if (new->mm_flags & MAC_MLS_FLAGS_BOTH) { - /* - * Rely on traditional superuser status for the MLS - * interface relabel requirements. XXX: This will go - * away. - */ - error = suser_cred(cred, 0); - if (error) - return (EPERM); - - /* - * XXXMAC: Additional consistency tests regarding the single - * and the range of the new label might be performed here. - */ - } + error = mac_mls_subject_privileged(subj); return (0); } @@ -1625,7 +1612,7 @@ * subject must have appropriate privilege. */ if (mac_mls_contains_equal(new)) { - error = mac_mls_subject_equal_ok(subj); + error = mac_mls_subject_privileged(subj); if (error) return (error); } @@ -1787,7 +1774,7 @@ * the subject must have appropriate privilege. */ if (mac_mls_contains_equal(new)) { - error = mac_mls_subject_equal_ok(subj); + error = mac_mls_subject_privileged(subj); if (error) return (error); } @@ -2242,7 +2229,7 @@ * the subject must have appropriate privilege. */ if (mac_mls_contains_equal(new)) { - error = mac_mls_subject_equal_ok(subj); + error = mac_mls_subject_privileged(subj); if (error) return (error); }
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