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authorDavid Quigley <dpquigl@davequigley.com>2013-05-22 12:50:35 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-06-08 16:20:11 -0400
commit746df9b59c8a5f162c907796c7295d3c4c0d8995 (patch)
tree6c0e7ae018bfb33f482afdc74d0c77d6b9edd152 /security/capability.c
parentd47be3dfecaf20255af89a57460285c82d5271ad (diff)
downloadlinux-746df9b59c8a5f162c907796c7295d3c4c0d8995.tar.gz
Security: Add Hook to test if the particular xattr is part of a MAC model.
The interface to request security labels from user space is the xattr interface. When requesting the security label from an NFS server it is important to make sure the requested xattr actually is a MAC label. This allows us to make sure that we get the desired semantics from the attribute instead of something else such as capabilities or a time based LSM. Acked-by: Eric Paris <eparis@redhat.com> Acked-by: James Morris <james.l.morris@oracle.com> Signed-off-by: Matthew N. Dodd <Matthew.Dodd@sparta.com> Signed-off-by: Miguel Rodel Felipe <Rodel_FM@dsi.a-star.edu.sg> Signed-off-by: Phua Eu Gene <PHUA_Eu_Gene@dsi.a-star.edu.sg> Signed-off-by: Khin Mi Mi Aung <Mi_Mi_AUNG@dsi.a-star.edu.sg> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'security/capability.c')
-rw-r--r--security/capability.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/security/capability.c b/security/capability.c
index 58578b4bdad..71f9682bfb5 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -823,6 +823,11 @@ static int cap_setprocattr(struct task_struct *p, char *name, void *value,
return -EINVAL;
}
+static int cap_ismaclabel(const char *name)
+{
+ return 0;
+}
+
static int cap_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
{
return -EOPNOTSUPP;
@@ -1042,6 +1047,7 @@ void __init security_fixup_ops(struct security_operations *ops)
set_to_cap_if_null(ops, d_instantiate);
set_to_cap_if_null(ops, getprocattr);
set_to_cap_if_null(ops, setprocattr);
+ set_to_cap_if_null(ops, ismaclabel);
set_to_cap_if_null(ops, secid_to_secctx);
set_to_cap_if_null(ops, secctx_to_secid);
set_to_cap_if_null(ops, release_secctx);