Check the class default targets are valid values, e.g. source or target
for user, role and type.
Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
---
v2:
do not reject in binary reading, but check at validation step
---
libsepol/src/policydb_validate.c | 41 ++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/libsepol/src/policydb_validate.c b/libsepol/src/policydb_validate.c
index 1c5ca0dd..b7868fbe 100644
--- a/libsepol/src/policydb_validate.c
+++ b/libsepol/src/policydb_validate.c
@@ -258,6 +258,47 @@ static int validate_class_datum(sepol_handle_t *handle, class_datum_t *class, va
if (class->permissions.nprim > PERM_SYMTAB_SIZE)
goto bad;
+ switch (class->default_user) {
+ case 0:
+ case DEFAULT_SOURCE:
+ case DEFAULT_TARGET:
+ break;
+ default:
+ goto bad;
+ }
+
+ switch (class->default_role) {
+ case 0:
+ case DEFAULT_SOURCE:
+ case DEFAULT_TARGET:
+ break;
+ default:
+ goto bad;
+ }
+
+ switch (class->default_type) {
+ case 0:
+ case DEFAULT_SOURCE:
+ case DEFAULT_TARGET:
+ break;
+ default:
+ goto bad;
+ }
+
+ switch (class->default_range) {
+ case 0:
+ case DEFAULT_SOURCE_LOW:
+ case DEFAULT_SOURCE_HIGH:
+ case DEFAULT_SOURCE_LOW_HIGH:
+ case DEFAULT_TARGET_LOW:
+ case DEFAULT_TARGET_HIGH:
+ case DEFAULT_TARGET_LOW_HIGH:
+ case DEFAULT_GLBLUB:
+ break;
+ default:
+ goto bad;
+ }
+
return 0;
bad:
--
2.33.1
