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author | rwatson <rwatson@FreeBSD.org> | 2008-08-23 15:26:36 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2008-08-23 15:26:36 +0000 |
commit | 78a117e6fa3ea5484baa385417846432dcafd758 (patch) | |
tree | 5219c0b4d17dd1dcbcb5fda367c1905a0929ee2b /sys/security/mac/mac_sysv_shm.c | |
parent | 36dc0db8e1fa12d3f6a38164a5fb1ae82fc45eba (diff) | |
download | FreeBSD-src-78a117e6fa3ea5484baa385417846432dcafd758.zip FreeBSD-src-78a117e6fa3ea5484baa385417846432dcafd758.tar.gz |
Introduce two related changes to the TrustedBSD MAC Framework:
(1) Abstract interpreter vnode labeling in execve(2) and mac_execve(2)
so that the general exec code isn't aware of the details of
allocating, copying, and freeing labels, rather, simply passes in
a void pointer to start and stop functions that will be used by
the framework. This change will be MFC'd.
(2) Introduce a new flags field to the MAC_POLICY_SET(9) interface
allowing policies to declare which types of objects require label
allocation, initialization, and destruction, and define a set of
flags covering various supported object types (MPC_OBJECT_PROC,
MPC_OBJECT_VNODE, MPC_OBJECT_INPCB, ...). This change reduces the
overhead of compiling the MAC Framework into the kernel if policies
aren't loaded, or if policies require labels on only a small number
or even no object types. Each time a policy is loaded or unloaded,
we recalculate a mask of labeled object types across all policies
present in the system. Eliminate MAC_ALWAYS_LABEL_MBUF option as it
is no longer required.
MFC after: 1 week ((1) only)
Reviewed by: csjp
Obtained from: TrustedBSD Project
Sponsored by: Apple, Inc.
Diffstat (limited to 'sys/security/mac/mac_sysv_shm.c')
-rw-r--r-- | sys/security/mac/mac_sysv_shm.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sys/security/mac/mac_sysv_shm.c b/sys/security/mac/mac_sysv_shm.c index 05ec1e1..950c23e 100644 --- a/sys/security/mac/mac_sysv_shm.c +++ b/sys/security/mac/mac_sysv_shm.c @@ -70,7 +70,10 @@ void mac_sysvshm_init(struct shmid_kernel *shmsegptr) { - shmsegptr->label = mac_sysv_shm_label_alloc(); + if (mac_labeled & MPC_OBJECT_SYSVSHM) + shmsegptr->label = mac_sysv_shm_label_alloc(); + else + shmsegptr->label = NULL; } static void @@ -85,8 +88,10 @@ void mac_sysvshm_destroy(struct shmid_kernel *shmsegptr) { - mac_sysv_shm_label_free(shmsegptr->label); - shmsegptr->label = NULL; + if (shmsegptr->label != NULL) { + mac_sysv_shm_label_free(shmsegptr->label); + shmsegptr->label = NULL; + } } void |