[PATCH] audit: support for object context filters

This patch introduces object audit filters based on the elements
of the SELinux context.

Signed-off-by: Darrel Goeddel <dgoeddel@trustedcs.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>

 kernel/auditfilter.c           |   25 +++++++++++++++++++++++++
 kernel/auditsc.c               |   40 ++++++++++++++++++++++++++++++++++++++++
 security/selinux/ss/services.c |   18 +++++++++++++++++-
 3 files changed, 82 insertions(+), 1 deletion(-)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 25 insertions, 0 deletions

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 40a9931a13e2..7f2ea8b84a27 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -475,6 +475,11 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
                 case AUDIT_SUBJ_TYPE:
                 case AUDIT_SUBJ_SEN:
                 case AUDIT_SUBJ_CLR:
+                case AUDIT_OBJ_USER:
+                case AUDIT_OBJ_ROLE:
+                case AUDIT_OBJ_TYPE:
+                case AUDIT_OBJ_LEV_LOW:
+                case AUDIT_OBJ_LEV_HIGH:
                         str = audit_unpack_string(&bufp, &remain, f->val);
                         if (IS_ERR(str))
                                 goto exit_free;
@@ -616,6 +621,11 @@ static struct audit_rule_data *audit_krule_to_data(struct audit_krule *krule)
                 case AUDIT_SUBJ_TYPE:
                 case AUDIT_SUBJ_SEN:
                 case AUDIT_SUBJ_CLR:
+                case AUDIT_OBJ_USER:
+                case AUDIT_OBJ_ROLE:
+                case AUDIT_OBJ_TYPE:
+                case AUDIT_OBJ_LEV_LOW:
+                case AUDIT_OBJ_LEV_HIGH:
                         data->buflen += data->values[i] =
                                 audit_pack_string(&bufp, f->se_str);
                         break;
@@ -659,6 +669,11 @@ static int audit_compare_rule(struct audit_krule *a, struct audit_krule *b)
                 case AUDIT_SUBJ_TYPE:
                 case AUDIT_SUBJ_SEN:
                 case AUDIT_SUBJ_CLR:
+                case AUDIT_OBJ_USER:
+                case AUDIT_OBJ_ROLE:
+                case AUDIT_OBJ_TYPE:
+                case AUDIT_OBJ_LEV_LOW:
+                case AUDIT_OBJ_LEV_HIGH:
                         if (strcmp(a->fields[i].se_str, b->fields[i].se_str))
                                 return 1;
                         break;
@@ -779,6 +794,11 @@ static struct audit_entry *audit_dupe_rule(struct audit_krule *old,
                 case AUDIT_SUBJ_TYPE:
                 case AUDIT_SUBJ_SEN:
                 case AUDIT_SUBJ_CLR:
+                case AUDIT_OBJ_USER:
+                case AUDIT_OBJ_ROLE:
+                case AUDIT_OBJ_TYPE:
+                case AUDIT_OBJ_LEV_LOW:
+                case AUDIT_OBJ_LEV_HIGH:
                         err = audit_dupe_selinux_field(&new->fields[i],
                                                        &old->fields[i]);
                         break;
@@ -1542,6 +1562,11 @@ static inline int audit_rule_has_selinux(struct audit_krule *rule)
                 case AUDIT_SUBJ_TYPE:
                 case AUDIT_SUBJ_SEN:
                 case AUDIT_SUBJ_CLR:
+                case AUDIT_OBJ_USER:
+                case AUDIT_OBJ_ROLE:
+                case AUDIT_OBJ_TYPE:
+                case AUDIT_OBJ_LEV_LOW:
+                case AUDIT_OBJ_LEV_HIGH:
                         return 1;
                 }
         }