diff options
Diffstat (limited to 'sys/security/mac/mac_label.c')
| -rw-r--r-- | sys/security/mac/mac_label.c | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/sys/security/mac/mac_label.c b/sys/security/mac/mac_label.c index 9e162a4..619df35 100644 --- a/sys/security/mac/mac_label.c +++ b/sys/security/mac/mac_label.c @@ -45,7 +45,7 @@ __FBSDID("$FreeBSD$"); #include <security/mac/mac_internal.h> /* - * zone_label is the UMA zone from which all labels are allocated. Label + * zone_label is the UMA zone from which most labels are allocated. Label * structures are initialized to zero bytes so that policies see a NULL/0 * slot on first use, even if the policy is loaded after the label is * allocated for an object. @@ -64,6 +64,34 @@ mac_labelzone_init(void) UMA_ALIGN_PTR, 0); } +/* + * mac_init_label() and mac_destroy_label() are exported so that they can be + * used in mbuf tag initialization, where labels are not slab allocated from + * the zone_label zone. + */ +void +mac_init_label(struct label *label) +{ + + bzero(label, sizeof(*label)); + label->l_flags = MAC_FLAG_INITIALIZED; +} + +void +mac_destroy_label(struct label *label) +{ + + KASSERT(label->l_flags & MAC_FLAG_INITIALIZED, + ("destroying uninitialized label")); + +#ifdef DIAGNOSTIC + bzero(label, sizeof(*label)); +#else + label->l_flags &= ~MAC_FLAG_INITIALIZED; +#endif +} + + static int mac_labelzone_ctor(void *mem, int size, void *arg, int flags) { @@ -71,8 +99,7 @@ mac_labelzone_ctor(void *mem, int size, void *arg, int flags) KASSERT(size == sizeof(*label), ("mac_labelzone_ctor: wrong size\n")); label = mem; - bzero(label, sizeof(*label)); - label->l_flags = MAC_FLAG_INITIALIZED; + mac_init_label(label); return (0); } @@ -83,13 +110,7 @@ mac_labelzone_dtor(void *mem, int size, void *arg) KASSERT(size == sizeof(*label), ("mac_labelzone_dtor: wrong size\n")); label = mem; - KASSERT(label->l_flags & MAC_FLAG_INITIALIZED, - ("mac_labelzone_dtor: label not initialized")); -#ifdef DIAGNOSTIC - bzero(label, sizeof(*label)); -#else - label->l_flags &= ~MAC_FLAG_INITIALIZED; -#endif + mac_destroy_label(label); } struct label * |
