On Tue, Jun 7, 2022 at 11:54 AM Christian Göttsche
<cgzones@xxxxxxxxxxxxxx> wrote:
>
> Users are allowed to be declared in modules. Modules do not get expanded
> leaving the `struct user_datum` members `exp_range` and `exp_dfltlevel`
> empty.
> Do no validate the expanded range and level for modular polices.
>
> Reported-by: bauen1 <j2468h@xxxxxxxxx>
> Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
Acked-by: James Carter <jwcart2@xxxxxxxxx>
> ---
> libsepol/src/policydb_validate.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/libsepol/src/policydb_validate.c b/libsepol/src/policydb_validate.c
> index da18282b..99d4eb7f 100644
> --- a/libsepol/src/policydb_validate.c
> +++ b/libsepol/src/policydb_validate.c
> @@ -18,7 +18,7 @@ typedef struct validate {
> typedef struct map_arg {
> validate_t *flavors;
> sepol_handle_t *handle;
> - int mls;
> + policydb_t *policy;
> } map_arg_t;
>
> static int create_gap_ebitmap(char **val_to_name, uint32_t nprim, ebitmap_t *gaps)
> @@ -571,7 +571,7 @@ static int validate_mls_range(mls_range_t *range, validate_t *sens, validate_t *
> return -1;
> }
>
> -static int validate_user_datum(sepol_handle_t *handle, user_datum_t *user, validate_t flavors[], int mls)
> +static int validate_user_datum(sepol_handle_t *handle, user_datum_t *user, validate_t flavors[], policydb_t *p)
> {
> if (validate_value(user->s.value, &flavors[SYM_USERS]))
> goto bad;
> @@ -581,9 +581,9 @@ static int validate_user_datum(sepol_handle_t *handle, user_datum_t *user, valid
> goto bad;
> if (validate_mls_semantic_level(&user->dfltlevel, &flavors[SYM_LEVELS], &flavors[SYM_CATS]))
> goto bad;
> - if (mls && validate_mls_range(&user->exp_range, &flavors[SYM_LEVELS], &flavors[SYM_CATS]))
> + if (p->mls && p->policy_type != POLICY_MOD && validate_mls_range(&user->exp_range, &flavors[SYM_LEVELS], &flavors[SYM_CATS]))
> goto bad;
> - if (mls && validate_mls_level(&user->exp_dfltlevel, &flavors[SYM_LEVELS], &flavors[SYM_CATS]))
> + if (p->mls && p->policy_type != POLICY_MOD && validate_mls_level(&user->exp_dfltlevel, &flavors[SYM_LEVELS], &flavors[SYM_CATS]))
> goto bad;
> if (user->bounds && validate_value(user->bounds, &flavors[SYM_USERS]))
> goto bad;
> @@ -599,7 +599,7 @@ static int validate_user_datum_wrapper(__attribute__((unused)) hashtab_key_t k,
> {
> map_arg_t *margs = args;
>
> - return validate_user_datum(margs->handle, d, margs->flavors, margs->mls);
> + return validate_user_datum(margs->handle, d, margs->flavors, margs->policy);
> }
>
> static int validate_bool_datum(sepol_handle_t *handle, cond_bool_datum_t *boolean, validate_t flavors[])
> @@ -689,7 +689,7 @@ static int validate_datum(__attribute__ ((unused))hashtab_key_t k, hashtab_datum
>
> static int validate_datum_array_entries(sepol_handle_t *handle, policydb_t *p, validate_t flavors[])
> {
> - map_arg_t margs = { flavors, handle, p->mls };
> + map_arg_t margs = { flavors, handle, p };
>
> if (hashtab_map(p->p_commons.table, validate_common_datum_wrapper, &margs))
> goto bad;
> --
> 2.36.1
>
