Re: [RFC PATCH v4 2/6] libsepol/cil: Add notself and minusself support to CIL

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James Carter <jwcart2@xxxxxxxxx> writes:

> On Fri, Nov 25, 2022 at 10:50 AM Christian Göttsche
> <cgzones@xxxxxxxxxxxxxx> wrote:
>>
>> From: James Carter <jwcart2@xxxxxxxxx>
>>
>> Like "self", both of these reserved words can be used as a target
>> in an access vector rule. "notself" means all types other than
>> the source type. "minuself" is meant to be used with an attribute
>> and its use results in the rule being expanded with each type of
>> the attribute being used as the source type with each of the other
>> types being used as the target type. Using "minusself" with just
>> a type will result in no rule.
>>
>> Example 1
>>   (allow TYPE1 notself (CLASS (PERM)))
>>
>> This rule is expanded to a number of rules with TYPE1 as the source
>> and every type except for TYPE1 as the target.
>>
>> Example 2
>>   (allow ATTR1 notself (CLASS (PERM)))
>>
>> Like Example 1, this rule will be expanded to each type in ATTR1
>> being the source with every type except for the type used as the
>> source being the target.
>>
>> Example 3
>>   (allow TYPE1 minusself (CLASS (PERM)))
>>
>> This expands to no rule.
>>
>> Example 4
>>   (allow ATTR1 minusself (CLASS (PERM)))
>>
>> Like Example 2, but the target types will be limited to the types
>> in the attribute ATTR1 instead of all types. So if ATTR1 has the
>> type t1, t2, and t3, then this rule expands to the following rules.
>>   (allow t1 t2 (CLASS (PERM)))
>>   (allow t1 t3 (CLASS (PERM)))
>>   (allow t2 t1 (CLASS (PERM)))
>>   (allow t2 t3 (CLASS (PERM)))
>>   (allow t3 t1 (CLASS (PERM)))
>>   (allow t3 t2 (CLASS (PERM)))
>>
>> Original patch from James Carter <jwcart2@xxxxxxxxx>
>>
>> Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
>
> I am going to send an update of this patch.
> I have come to prefer using "other" rather than "minusself"
> And updated the patch to use ebitmap_is_empty()
>

Other patches were acked. Is it possible to merge them without this? 

Thanks,

Petr


>
>> ---
>>  libsepol/cil/src/cil.c             |  12 ++
>>  libsepol/cil/src/cil_binary.c      |  91 ++++++++++++-
>>  libsepol/cil/src/cil_build_ast.c   |  10 +-
>>  libsepol/cil/src/cil_find.c        | 206 +++++++++++++++++++++++++----
>>  libsepol/cil/src/cil_internal.h    |   4 +
>>  libsepol/cil/src/cil_resolve_ast.c |   4 +
>>  libsepol/cil/src/cil_verify.c      |   3 +-
>>  7 files changed, 300 insertions(+), 30 deletions(-)
>>
>> diff --git a/libsepol/cil/src/cil.c b/libsepol/cil/src/cil.c
>> index 38edcf8e..d807a2c4 100644
>> --- a/libsepol/cil/src/cil.c
>> +++ b/libsepol/cil/src/cil.c
>> @@ -84,6 +84,8 @@ char *CIL_KEY_CONS_INCOMP;
>>  char *CIL_KEY_CONDTRUE;
>>  char *CIL_KEY_CONDFALSE;
>>  char *CIL_KEY_SELF;
>> +char *CIL_KEY_NOTSELF;
>> +char *CIL_KEY_MINUSSELF;
>>  char *CIL_KEY_OBJECT_R;
>>  char *CIL_KEY_STAR;
>>  char *CIL_KEY_TCP;
>> @@ -253,6 +255,8 @@ static void cil_init_keys(void)
>>         CIL_KEY_CONDTRUE = cil_strpool_add("true");
>>         CIL_KEY_CONDFALSE = cil_strpool_add("false");
>>         CIL_KEY_SELF = cil_strpool_add("self");
>> +       CIL_KEY_NOTSELF = cil_strpool_add("notself");
>> +       CIL_KEY_MINUSSELF = cil_strpool_add("minusself");
>>         CIL_KEY_OBJECT_R = cil_strpool_add("object_r");
>>         CIL_KEY_STAR = cil_strpool_add("*");
>>         CIL_KEY_UDP = cil_strpool_add("udp");
>> @@ -430,6 +434,12 @@ void cil_db_init(struct cil_db **db)
>>         cil_type_init(&(*db)->selftype);
>>         (*db)->selftype->datum.name = CIL_KEY_SELF;
>>         (*db)->selftype->datum.fqn = CIL_KEY_SELF;
>> +       cil_type_init(&(*db)->notselftype);
>> +       (*db)->notselftype->datum.name = CIL_KEY_NOTSELF;
>> +       (*db)->notselftype->datum.fqn = CIL_KEY_NOTSELF;
>> +       cil_type_init(&(*db)->minusselftype);
>> +       (*db)->minusselftype->datum.name = CIL_KEY_MINUSSELF;
>> +       (*db)->minusselftype->datum.fqn = CIL_KEY_MINUSSELF;
>>         (*db)->num_types_and_attrs = 0;
>>         (*db)->num_classes = 0;
>>         (*db)->num_types = 0;
>> @@ -483,6 +493,8 @@ void cil_db_destroy(struct cil_db **db)
>>         cil_list_destroy(&(*db)->names, CIL_TRUE);
>>
>>         cil_destroy_type((*db)->selftype);
>> +       cil_destroy_type((*db)->notselftype);
>> +       cil_destroy_type((*db)->minusselftype);
>>
>>         cil_strpool_destroy();
>>         free((*db)->val_to_type);
>> diff --git a/libsepol/cil/src/cil_binary.c b/libsepol/cil/src/cil_binary.c
>> index 40615db2..29b00336 100644
>> --- a/libsepol/cil/src/cil_binary.c
>> +++ b/libsepol/cil/src/cil_binary.c
>> @@ -1519,6 +1519,46 @@ static int __cil_avrule_to_avtab(policydb_t *pdb, const struct cil_db *db, struc
>>                         }
>>                 }
>>                 ebitmap_destroy(&src_bitmap);
>> +       } else if (tgt->fqn == CIL_KEY_NOTSELF) {
>> +               rc = __cil_expand_type(src, &src_bitmap);
>> +               if (rc != SEPOL_OK) {
>> +                       goto exit;
>> +               }
>> +
>> +               ebitmap_for_each_positive_bit(&src_bitmap, snode, s) {
>> +                       src = DATUM(db->val_to_type[s]);
>> +                       for (t = 0; t < (unsigned int)db->num_types; t++) {
>> +                               if (s != t) {
>> +                                       tgt = DATUM(db->val_to_type[t]);
>> +                                       rc = __cil_avrule_expand(pdb, kind, src, tgt, classperms, cond_node, cond_flavor);
>> +                                       if (rc != SEPOL_OK) {
>> +                                               ebitmap_destroy(&src_bitmap);
>> +                                               goto exit;
>> +                                       }
>> +                               }
>> +                       }
>> +               }
>> +               ebitmap_destroy(&src_bitmap);
>> +       } else if (tgt->fqn == CIL_KEY_MINUSSELF) {
>> +               rc = __cil_expand_type(src, &src_bitmap);
>> +               if (rc != SEPOL_OK) {
>> +                       goto exit;
>> +               }
>> +
>> +               ebitmap_for_each_positive_bit(&src_bitmap, snode, s) {
>> +                       src = DATUM(db->val_to_type[s]);
>> +                       ebitmap_for_each_positive_bit(&src_bitmap, tnode, t) {
>> +                               if (s != t) {
>> +                                       tgt = DATUM(db->val_to_type[t]);
>> +                                       rc = __cil_avrule_expand(pdb, kind, src, tgt, classperms, cond_node, cond_flavor);
>> +                                       if (rc != SEPOL_OK) {
>> +                                               ebitmap_destroy(&src_bitmap);
>> +                                               goto exit;
>> +                                       }
>> +                               }
>> +                       }
>> +               }
>> +               ebitmap_destroy(&src_bitmap);
>>         } else {
>>                 int expand_src = __cil_should_expand_attribute(db, src);
>>                 int expand_tgt = __cil_should_expand_attribute(db, tgt);
>> @@ -1875,10 +1915,51 @@ static int cil_avrulex_to_hashtable(policydb_t *pdb, const struct cil_db *db, st
>>                         src = DATUM(db->val_to_type[s]);
>>                         rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, src, cil_avrulex->perms.x.permx, args);
>>                         if (rc != SEPOL_OK) {
>> +                               ebitmap_destroy(&src_bitmap);
>>                                 goto exit;
>>                         }
>>                 }
>>                 ebitmap_destroy(&src_bitmap);
>> +       } else if (tgt->fqn == CIL_KEY_NOTSELF) {
>> +               rc = __cil_expand_type(src, &src_bitmap);
>> +               if (rc != SEPOL_OK) {
>> +                       goto exit;
>> +               }
>> +
>> +               ebitmap_for_each_positive_bit(&src_bitmap, snode, s) {
>> +                       src = DATUM(db->val_to_type[s]);
>> +                       for (t = 0; t < (unsigned int)db->num_types; t++) {
>> +                               if (s != t) {
>> +                                       tgt = DATUM(db->val_to_type[t]);
>> +                                       rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, tgt, cil_avrulex->perms.x.permx, args);
>> +                                       if (rc != SEPOL_OK) {
>> +                                               ebitmap_destroy(&src_bitmap);
>> +                                               goto exit;
>> +                                       }
>> +                               }
>> +                       }
>> +               }
>> +               ebitmap_destroy(&src_bitmap);
>> +       } else if (tgt->fqn == CIL_KEY_MINUSSELF) {
>> +               rc = __cil_expand_type(src, &src_bitmap);
>> +               if (rc != SEPOL_OK) {
>> +                       goto exit;
>> +               }
>> +
>> +               ebitmap_for_each_positive_bit(&src_bitmap, snode, s) {
>> +                       src = DATUM(db->val_to_type[s]);
>> +                       ebitmap_for_each_positive_bit(&src_bitmap, tnode, t) {
>> +                               if (s != t) {
>> +                                       tgt = DATUM(db->val_to_type[t]);
>> +                                       rc = __cil_avrulex_to_hashtable_helper(pdb, kind, src, tgt, cil_avrulex->perms.x.permx, args);
>> +                                       if (rc != SEPOL_OK) {
>> +                                               ebitmap_destroy(&src_bitmap);
>> +                                               goto exit;
>> +                                       }
>> +                               }
>> +                       }
>> +               }
>> +               ebitmap_destroy(&src_bitmap);
>>         } else {
>>                 int expand_src = __cil_should_expand_attribute(db, src);
>>                 int expand_tgt = __cil_should_expand_attribute(db, tgt);
>> @@ -4813,8 +4894,16 @@ static int cil_check_neverallow(const struct cil_db *db, policydb_t *pdb, struct
>>
>>         if (tgt->fqn == CIL_KEY_SELF) {
>>                 rule->flags = RULE_SELF;
>> +       } else if (tgt->fqn == CIL_KEY_NOTSELF) {
>> +               rule->flags = RULE_NOTSELF;
>> +       } else if (tgt->fqn == CIL_KEY_MINUSSELF) {
>> +               rule->flags = RULE_NOTSELF;
>> +               rc = __cil_add_sepol_type(pdb, db, cil_rule->src, &rule->ttypes.types);
>> +               if (rc != SEPOL_OK) {
>> +                       goto exit;
>> +               }
>>         } else {
>> -               rc = __cil_add_sepol_type(pdb, db, cil_rule->tgt, &rule->ttypes.types);
>> +               rc = __cil_add_sepol_type(pdb, db, tgt, &rule->ttypes.types);
>>                 if (rc != SEPOL_OK) {
>>                         goto exit;
>>                 }
>> diff --git a/libsepol/cil/src/cil_build_ast.c b/libsepol/cil/src/cil_build_ast.c
>> index 4177c9f6..ca9f80c7 100644
>> --- a/libsepol/cil/src/cil_build_ast.c
>> +++ b/libsepol/cil/src/cil_build_ast.c
>> @@ -3126,9 +3126,13 @@ int cil_gen_aliasactual(struct cil_db *db, struct cil_tree_node *parse_current,
>>                 goto exit;
>>         }
>>
>> -       if ((flavor == CIL_TYPEALIAS && parse_current->next->data == CIL_KEY_SELF) || parse_current->next->next->data == CIL_KEY_SELF) {
>> -               cil_log(CIL_ERR, "The keyword '%s' is reserved\n", CIL_KEY_SELF);
>> -               rc = SEPOL_ERR;
>> +       rc = cil_verify_name(db, parse_current->next->data, flavor);
>> +       if (rc != SEPOL_OK) {
>> +               goto exit;
>> +       }
>> +
>> +       rc = cil_verify_name(db, parse_current->next->next->data, flavor);
>> +       if (rc != SEPOL_OK) {
>>                 goto exit;
>>         }
>>
>> diff --git a/libsepol/cil/src/cil_find.c b/libsepol/cil/src/cil_find.c
>> index 8b755277..1518d33d 100644
>> --- a/libsepol/cil/src/cil_find.c
>> +++ b/libsepol/cil/src/cil_find.c
>> @@ -115,12 +115,13 @@ static int cil_type_matches(ebitmap_t *matches, struct cil_symtab_datum *d1, str
>>
>>  /* s1 is the src type that is matched with a self
>>   * s2, and t2 are the source and type of the other rule
>> + * Assumes there is a match between s1 and s2
>>   */
>>  static int cil_self_match_any(struct cil_symtab_datum *s1, struct cil_symtab_datum *s2, struct cil_symtab_datum *t2)
>>  {
>>         int rc;
>> -       struct cil_tree_node *n1 = NODE(s1);
>> -       if (n1->flavor != CIL_TYPEATTRIBUTE) {
>> +
>> +       if (FLAVOR(s1) != CIL_TYPEATTRIBUTE) {
>>                 rc = cil_type_match_any(s1, t2);
>>         } else {
>>                 struct cil_typeattribute *a = (struct cil_typeattribute *)s1;
>> @@ -129,20 +130,149 @@ static int cil_self_match_any(struct cil_symtab_datum *s1, struct cil_symtab_dat
>>                 rc = cil_type_matches(&map, s2, t2);
>>                 if (rc < 0) {
>>                         ebitmap_destroy(&map);
>> -                       goto exit;
>> +                       return rc;
>>                 }
>> -               if (map.node == NULL) {
>> -                       rc = CIL_FALSE;
>> -                       goto exit;
>> +               if (!ebitmap_startnode(&map)) {
>> +                       ebitmap_destroy(&map);
>> +                       return CIL_FALSE;
>>                 }
>>                 rc = ebitmap_match_any(&map, a->types);
>>                 ebitmap_destroy(&map);
>>         }
>>
>> -exit:
>>         return rc;
>>  }
>>
>> +/* s1 is the src type that is matched with a notself
>> + * s2 and t2 are the source and type of the other rule
>> + * Assumes there is a match between s1 and s2
>> + */
>> +static int cil_notself_match_any(struct cil_symtab_datum *s1, struct cil_symtab_datum *s2, struct cil_symtab_datum *t2)
>> +{
>> +       int rc;
>> +       ebitmap_node_t *snode, *tnode;
>> +       unsigned int s,t;
>> +
>> +       if (FLAVOR(s1) != CIL_TYPEATTRIBUTE) {
>> +               struct cil_type *ts1 = (struct cil_type *)s1;
>> +               if (FLAVOR(t2) != CIL_TYPEATTRIBUTE) {
>> +                       struct cil_type *tt2 = (struct cil_type *)t2;
>> +                       if (ts1->value != tt2->value) {
>> +                               return CIL_TRUE;
>> +                       }
>> +               } else {
>> +                       struct cil_typeattribute *at2 = (struct cil_typeattribute *)t2;
>> +                       ebitmap_for_each_positive_bit(at2->types, tnode, t) {
>> +                               if (t != (unsigned int)ts1->value) {
>> +                                       return CIL_TRUE;
>> +                               }
>> +                       }
>> +               }
>> +       } else {
>> +               ebitmap_t smap;
>> +               ebitmap_init(&smap);
>> +               rc = cil_type_matches(&smap, s1, s2);
>> +               if (rc < 0) {
>> +                       ebitmap_destroy(&smap);
>> +                       return rc;
>> +               }
>> +               if (!ebitmap_startnode(&smap)) {
>> +                       ebitmap_destroy(&smap);
>> +                       return CIL_FALSE;
>> +               }
>> +               if (FLAVOR(t2) != CIL_TYPEATTRIBUTE) {
>> +                       struct cil_type *tt2 = (struct cil_type *)t2;
>> +                       ebitmap_for_each_positive_bit(&smap, snode, s) {
>> +                               if (s != (unsigned int)tt2->value) {
>> +                                       ebitmap_destroy(&smap);
>> +                                       return CIL_TRUE;
>> +                               }
>> +                       }
>> +               } else {
>> +                       struct cil_typeattribute *at2 = (struct cil_typeattribute *)t2;
>> +                       ebitmap_for_each_positive_bit(&smap, snode, s) {
>> +                               ebitmap_for_each_positive_bit(at2->types, tnode, t) {
>> +                                       if (s != t) {
>> +                                               ebitmap_destroy(&smap);
>> +                                               return CIL_TRUE;
>> +                                       }
>> +                               }
>> +                       }
>> +               }
>> +               ebitmap_destroy(&smap);
>> +       }
>> +
>> +       return CIL_FALSE;
>> +}
>> +
>> +/* s1 is the src type that is matched with a minusself
>> + * s2, and t2 are the source and type of the other rule
>> + * Assumes there is a match between s1 and s2
>> + */
>> +static int cil_minusself_match_any(struct cil_symtab_datum *s1, struct cil_symtab_datum *s2, struct cil_symtab_datum *t2)
>> +{
>> +       int rc;
>> +
>> +       if (FLAVOR(s1) != CIL_TYPEATTRIBUTE) {
>> +               return CIL_FALSE;
>> +       } else {
>> +               ebitmap_t smap, tmap;
>> +               ebitmap_node_t *snode, *tnode;
>> +               unsigned int s,t;
>> +
>> +               ebitmap_init(&smap);
>> +               rc = cil_type_matches(&smap, s1, s2);
>> +               if (rc < 0) {
>> +                       ebitmap_destroy(&smap);
>> +                       return rc;
>> +               }
>> +
>> +               ebitmap_init(&tmap);
>> +               rc = cil_type_matches(&tmap, s1, t2);
>> +               if (rc < 0) {
>> +                       ebitmap_destroy(&smap);
>> +                       ebitmap_destroy(&tmap);
>> +                       return rc;
>> +               }
>> +
>> +               if (!ebitmap_startnode(&smap) || !ebitmap_startnode(&tmap)) {
>> +                       ebitmap_destroy(&smap);
>> +                       ebitmap_destroy(&tmap);
>> +                       return CIL_FALSE;
>> +               }
>> +
>> +               ebitmap_for_each_positive_bit(&smap, snode, s) {
>> +                       ebitmap_for_each_positive_bit(&tmap, tnode, t) {
>> +                               if (s != t) {
>> +                                       ebitmap_destroy(&smap);
>> +                                       ebitmap_destroy(&tmap);
>> +                                       return CIL_TRUE;
>> +                               }
>> +                       }
>> +               }
>> +
>> +               ebitmap_destroy(&smap);
>> +               ebitmap_destroy(&tmap);
>> +       }
>> +
>> +       return CIL_FALSE;
>> +}
>> +
>> +/* s2 is the src type that is matched with a minusself
>> + * Assumes there is a match between s1 and s2
>> + * s1 is not needed, since it is known that there is a match
>> + */
>> +static int cil_notself_minusself_match_any(struct cil_symtab_datum *s2)
>> +{
>> +       if (FLAVOR(s2) == CIL_TYPEATTRIBUTE) {
>> +               struct cil_typeattribute *as2 = (struct cil_typeattribute *)s2;
>> +               if (ebitmap_cardinality(as2->types) > 1) {
>> +                       return CIL_TRUE;
>> +               }
>> +       }
>> +       return CIL_FALSE;
>> +}
>> +
>>  static int cil_classperms_match_any(struct cil_classperms *cp1, struct cil_classperms *cp2)
>>  {
>>         struct cil_class *c1 = cp1->class;
>> @@ -308,30 +438,56 @@ static int cil_find_matching_avrule(struct cil_tree_node *node, struct cil_avrul
>>
>>         if (!cil_type_match_any(s1, s2)) goto exit;
>>
>> -       if (t1->fqn != CIL_KEY_SELF && t2->fqn != CIL_KEY_SELF) {
>> -               if (!cil_type_match_any(t1, t2)) goto exit;
>> -       } else {
>> -               if (t1->fqn == CIL_KEY_SELF && t2->fqn == CIL_KEY_SELF) {
>> +       if (t1->fqn == CIL_KEY_SELF) {
>> +               if (t2->fqn == CIL_KEY_SELF) {
>>                         /* The earlier check whether s1 and s2 matches is all that is needed */
>> -               } else if (t1->fqn == CIL_KEY_SELF) {
>> +                       rc = CIL_TRUE;
>> +               } else if (t2->fqn == CIL_KEY_NOTSELF || t2->fqn == CIL_KEY_MINUSSELF) {
>> +                       rc = CIL_FALSE;
>> +               } else {
>>                         rc = cil_self_match_any(s1, s2, t2);
>> -                       if (rc < 0) {
>> -                               goto exit;
>> -                       } else if (rc == CIL_FALSE) {
>> -                               rc = SEPOL_OK;
>> -                               goto exit;
>> -                       }
>> -               } else if (t2->fqn == CIL_KEY_SELF) {
>> +               }
>> +       } else if (t1->fqn == CIL_KEY_NOTSELF) {
>> +               if (t2->fqn == CIL_KEY_SELF) {
>> +                       rc = CIL_FALSE;
>> +               } else if (t2->fqn == CIL_KEY_NOTSELF) {
>> +                       /* The earlier check whether s1 and s2 matches is all that is needed */
>> +                       rc = CIL_TRUE;
>> +               } else if (t2->fqn == CIL_KEY_MINUSSELF) {
>> +                       rc = cil_notself_minusself_match_any(s2);
>> +               } else {
>> +                       rc = cil_notself_match_any(s1, s2, t2);
>> +               }
>> +       } else if (t1->fqn == CIL_KEY_MINUSSELF) {
>> +               if (t2->fqn == CIL_KEY_SELF) {
>> +                       rc = CIL_FALSE;
>> +               } else if (t2->fqn == CIL_KEY_NOTSELF) {
>> +                       rc = cil_notself_minusself_match_any(s1);
>> +               } else if (t2->fqn == CIL_KEY_MINUSSELF) {
>> +                       /* The earlier check whether s1 and s2 matches is all that is needed */
>> +                       rc = CIL_TRUE;
>> +               } else {
>> +                       rc = cil_minusself_match_any(s1, s2, t2);
>> +               }
>> +       } else {
>> +               if (t2->fqn == CIL_KEY_SELF) {
>>                         rc = cil_self_match_any(s2, s1, t1);
>> -                       if (rc < 0) {
>> -                               goto exit;
>> -                       } else if (rc == CIL_FALSE) {
>> -                               rc = SEPOL_OK;
>> -                               goto exit;
>> -                       }
>> +               } else if (t2->fqn == CIL_KEY_NOTSELF) {
>> +                       rc = cil_notself_match_any(s2, s1, t1);
>> +               } else if (t2->fqn == CIL_KEY_MINUSSELF) {
>> +                       rc = cil_minusself_match_any(s2, s1, t1);
>> +               } else {
>> +                       rc = cil_type_match_any(t1, t2);
>>                 }
>>         }
>>
>> +       if (rc < 0) {
>> +               goto exit;
>> +       } else if (rc == CIL_FALSE) {
>> +               rc = SEPOL_OK;
>> +               goto exit;
>> +       }
>> +
>>         if (!target->is_extended) {
>>                 if (cil_classperms_list_match_any(avrule->perms.classperms, target->perms.classperms)) {
>>                         cil_list_append(matching, CIL_NODE, node);
>> diff --git a/libsepol/cil/src/cil_internal.h b/libsepol/cil/src/cil_internal.h
>> index a7604762..d293b9ba 100644
>> --- a/libsepol/cil/src/cil_internal.h
>> +++ b/libsepol/cil/src/cil_internal.h
>> @@ -101,6 +101,8 @@ extern char *CIL_KEY_CONS_INCOMP;
>>  extern char *CIL_KEY_CONDTRUE;
>>  extern char *CIL_KEY_CONDFALSE;
>>  extern char *CIL_KEY_SELF;
>> +extern char *CIL_KEY_NOTSELF;
>> +extern char *CIL_KEY_MINUSSELF;
>>  extern char *CIL_KEY_OBJECT_R;
>>  extern char *CIL_KEY_STAR;
>>  extern char *CIL_KEY_TCP;
>> @@ -289,6 +291,8 @@ struct cil_db {
>>         struct cil_tree *parse;
>>         struct cil_tree *ast;
>>         struct cil_type *selftype;
>> +       struct cil_type *notselftype;
>> +       struct cil_type *minusselftype;
>>         struct cil_list *sidorder;
>>         struct cil_list *classorder;
>>         struct cil_list *catorder;
>> diff --git a/libsepol/cil/src/cil_resolve_ast.c b/libsepol/cil/src/cil_resolve_ast.c
>> index f5e22c97..9065fe09 100644
>> --- a/libsepol/cil/src/cil_resolve_ast.c
>> +++ b/libsepol/cil/src/cil_resolve_ast.c
>> @@ -333,6 +333,10 @@ int cil_resolve_avrule(struct cil_tree_node *current, void *extra_args)
>>
>>         if (rule->tgt_str == CIL_KEY_SELF) {
>>                 rule->tgt = db->selftype;
>> +       } else if (rule->tgt_str == CIL_KEY_NOTSELF) {
>> +               rule->tgt = db->notselftype;
>> +       } else if (rule->tgt_str == CIL_KEY_MINUSSELF) {
>> +               rule->tgt = db->minusselftype;
>>         } else {
>>                 rc = cil_resolve_name(current, rule->tgt_str, CIL_SYM_TYPES, args, &tgt_datum);
>>                 if (rc != SEPOL_OK) {
>> diff --git a/libsepol/cil/src/cil_verify.c b/libsepol/cil/src/cil_verify.c
>> index 4640dc59..1706fbf2 100644
>> --- a/libsepol/cil/src/cil_verify.c
>> +++ b/libsepol/cil/src/cil_verify.c
>> @@ -68,7 +68,8 @@ static int __cil_is_reserved_name(const char *name, enum cil_flavor flavor)
>>         case CIL_TYPE:
>>         case CIL_TYPEATTRIBUTE:
>>         case CIL_TYPEALIAS:
>> -               if ((name == CIL_KEY_ALL) || (name == CIL_KEY_SELF))
>> +               if ((name == CIL_KEY_ALL) || (name == CIL_KEY_SELF) || (name == CIL_KEY_NOTSELF)
>> +                       || (name == CIL_KEY_MINUSSELF))
>>                         return CIL_TRUE;
>>                 break;
>>         case CIL_CAT:
>> --
>> 2.38.1
>>





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