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[71.166.99.106]) by smtp.gmail.com with ESMTPSA id 62sm2448813qkh.113.2020.05.20.08.42.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2020 08:42:24 -0700 (PDT) From: James Carter To: selinux@vger.kernel.org Cc: James Carter Subject: [PATCH 1/2] libsepol: Fix type alias handling in kernel_to_cil Date: Wed, 20 May 2020 11:42:12 -0400 Message-Id: <20200520154213.117606-1-jwcart2@gmail.com> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 Sender: selinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: selinux@vger.kernel.org Type alias rules are not written out when converting a binary kernel policy to CIL. The problem is that type aliases are not in the type_val_to_struct array and that is what is being used to find the aliases. Since type aliases are only in the types hashtable, walk that to find the type aliases. Fixes: 70a480bfcd46214a ("libsepol: Add ability to convert binary policy to CIL") Signed-off-by: James Carter --- libsepol/src/kernel_to_cil.c | 44 +++++++++++++++++++++++++++--------- 1 file changed, 33 insertions(+), 11 deletions(-) diff --git a/libsepol/src/kernel_to_cil.c b/libsepol/src/kernel_to_cil.c index ede78a20..bc5f9b52 100644 --- a/libsepol/src/kernel_to_cil.c +++ b/libsepol/src/kernel_to_cil.c @@ -1367,33 +1367,55 @@ exit: return rc; } +static int map_count_type_aliases(char *key, void *data, void *args) +{ + type_datum_t *datum = data; + unsigned *count = args; + + if (datum->primary == 0 && datum->flavor == TYPE_TYPE) + (*count)++; + + return SEPOL_OK; +} + +static int map_type_aliases_to_strs(char *key, void *data, void *args) +{ + type_datum_t *datum = data; + struct strs *strs = args; + int rc = 0; + + if (datum->primary == 0 && datum->flavor == TYPE_TYPE) + rc = strs_add(strs, key); + + return rc; +} + static int write_type_alias_rules_to_cil(FILE *out, struct policydb *pdb) { type_datum_t *alias; struct strs *strs; char *name; char *type; - unsigned i, num; + unsigned i, num = 0; int rc = 0; - rc = strs_init(&strs, pdb->p_types.nprim); + rc = hashtab_map(pdb->p_types.table, map_count_type_aliases, &num); if (rc != 0) { goto exit; } - for (i=0; i < pdb->p_types.nprim; i++) { - alias = pdb->type_val_to_struct[i]; - if (!alias->primary) { - rc = strs_add(strs, pdb->p_type_val_to_name[i]); - if (rc != 0) { - goto exit; - } - } + rc = strs_init(&strs, num); + if (rc != 0) { + goto exit; + } + + rc = hashtab_map(pdb->p_types.table, map_type_aliases_to_strs, strs); + if (rc != 0) { + goto exit; } strs_sort(strs); - num = strs_num_items(strs); for (i=0; i