Implementations of mpo_check_vnode_deleteextattr() and

mpo_check_vnode_listextattr() for Biba, MLS, and BSD Extended.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories

1 files changed, 38 insertions, 0 deletions

diff --git a/sys/security/mac_biba/mac_biba.c b/sys/security/mac_biba/mac_biba.c
index afd5c7a..a784ed7 100644
--- a/sys/security/mac_biba/mac_biba.c
+++ b/sys/security/mac_biba/mac_biba.c
@@ -2071,6 +2071,24 @@ mac_biba_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
 }
 
 static int
+mac_biba_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp,
+    struct label *label, int attrnamespace, const char *name)
+{
+	struct mac_biba *subj, *obj;
+
+	if (!mac_biba_enabled)
+		return (0);
+
+	subj = SLOT(&cred->cr_label);
+	obj = SLOT(label);
+
+	if (!mac_biba_dominate_single(subj, obj))
+		return (EACCES);
+
+	return (0);
+}
+
+static int
 mac_biba_check_vnode_exec(struct ucred *cred, struct vnode *vp,
     struct label *label, struct image_params *imgp,
     struct label *execlabel)
@@ -2163,6 +2181,24 @@ mac_biba_check_vnode_link(struct ucred *cred, struct vnode *dvp,
 }
 
 static int
+mac_biba_check_vnode_listextattr(struct ucred *cred, struct vnode *vp,
+    struct label *label, int attrnamespace)
+{
+	struct mac_biba *subj, *obj;
+
+	if (!mac_biba_enabled)
+		return (0);
+
+	subj = SLOT(&cred->cr_label);
+	obj = SLOT(label);
+
+	if (!mac_biba_dominate_single(obj, subj))
+		return (EACCES);
+
+	return (0);
+}
+
+static int
 mac_biba_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
     struct label *dlabel, struct componentname *cnp)
 {
@@ -2683,10 +2719,12 @@ static struct mac_policy_ops mac_biba_ops =
 	.mpo_check_vnode_create = mac_biba_check_vnode_create,
 	.mpo_check_vnode_delete = mac_biba_check_vnode_delete,
 	.mpo_check_vnode_deleteacl = mac_biba_check_vnode_deleteacl,
+	.mpo_check_vnode_deleteextattr = mac_biba_check_vnode_deleteextattr,
 	.mpo_check_vnode_exec = mac_biba_check_vnode_exec,
 	.mpo_check_vnode_getacl = mac_biba_check_vnode_getacl,
 	.mpo_check_vnode_getextattr = mac_biba_check_vnode_getextattr,
 	.mpo_check_vnode_link = mac_biba_check_vnode_link,
+	.mpo_check_vnode_listextattr = mac_biba_check_vnode_listextattr,
 	.mpo_check_vnode_lookup = mac_biba_check_vnode_lookup,
 	.mpo_check_vnode_mmap = mac_biba_check_vnode_mmap,
 	.mpo_check_vnode_mprotect = mac_biba_check_vnode_mmap,