libsepol: Replace calls to mallocarray() with calls to calloc()

Since calloc() will return an error if nmemb * size would overflow,
just use it instead of mallocarray(). This also allows code that
initializes the array to zero to be removed.

Signed-off-by: James Carter <jwcart2@gmail.com>

libsepol/src/expand.c

@@ -3153,17 +3153,15 @@ int expand_module(sepol_handle_t * handle,
 		goto cleanup;
 
 	/* Build the type<->attribute maps and remove attributes. */
-	state.out->attr_type_map = mallocarray(state.out->p_types.nprim,
+	state.out->attr_type_map = calloc(state.out->p_types.nprim,
 					  sizeof(ebitmap_t));
-	state.out->type_attr_map = mallocarray(state.out->p_types.nprim,
+	state.out->type_attr_map = calloc(state.out->p_types.nprim,
 					  sizeof(ebitmap_t));
 	if (!state.out->attr_type_map || !state.out->type_attr_map) {
 		ERR(handle, "Out of memory!");
 		goto cleanup;
 	}
 	for (i = 0; i < state.out->p_types.nprim; i++) {
-		ebitmap_init(&state.out->type_attr_map[i]);
-		ebitmap_init(&state.out->attr_type_map[i]);
 		/* add the type itself as the degenerate case */
 		if (ebitmap_set_bit(&state.out->type_attr_map[i], i, 1)) {
 			ERR(handle, "Out of memory!");

libsepol/src/hashtab.c

@@ -43,7 +43,6 @@ hashtab_t hashtab_create(unsigned int (*hash_value) (hashtab_t h,
 {
 
 	hashtab_t p;
-	unsigned int i;
 
 	p = (hashtab_t) malloc(sizeof(hashtab_val_t));
 	if (p == NULL)
@@ -54,13 +53,11 @@ hashtab_t hashtab_create(unsigned int (*hash_value) (hashtab_t h,
 	p->nel = 0;
 	p->hash_value = hash_value;
 	p->keycmp = keycmp;
-	p->htable = (hashtab_ptr_t *) mallocarray(size, sizeof(hashtab_ptr_t));
+	p->htable = (hashtab_ptr_t *) calloc(size, sizeof(hashtab_ptr_t));
 	if (p->htable == NULL) {
 		free(p);
 		return NULL;
 	}
-	for (i = 0; i < size; i++)
-		p->htable[i] = (hashtab_ptr_t) NULL;
 
 	return p;
 }

libsepol/src/link.c

@@ -1681,14 +1681,10 @@ static int copy_scope_index(scope_index_t * src, scope_index_t * dest,
 	}
 
 	/* next copy the enabled permissions data  */
-	if ((dest->class_perms_map = mallocarray(largest_mapped_class_value,
-					    sizeof(*dest->class_perms_map))) ==
-	    NULL) {
+	if ((dest->class_perms_map = calloc(largest_mapped_class_value,
+					    sizeof(*dest->class_perms_map))) == NULL) {
 		goto cleanup;
 	}
-	for (i = 0; i < largest_mapped_class_value; i++) {
-		ebitmap_init(dest->class_perms_map + i);
-	}
 	dest->class_perms_len = largest_mapped_class_value;
 	for (i = 0; i < src->class_perms_len; i++) {
 		ebitmap_t *srcmap = src->class_perms_map + i;

libsepol/src/module.c

@@ -409,14 +409,14 @@ static int module_package_read_offsets(sepol_module_package_t * mod,
 		goto err;
 	}
 
-	off = (size_t *) mallocarray(nsec + 1, sizeof(size_t));
+	off = (size_t *) calloc(nsec + 1, sizeof(size_t));
 	if (!off) {
 		ERR(file->handle, "out of memory");
 		goto err;
 	}
 
 	free(buf);
-	buf = mallocarray(nsec, sizeof(uint32_t));
+	buf = calloc(nsec, sizeof(uint32_t));
 	if (!buf) {
 		ERR(file->handle, "out of memory");
 		goto err;

libsepol/src/module_to_cil.c

@@ -432,7 +432,7 @@ static int stack_init(struct stack **stack)
 		goto exit;
 	}
 
-	s->stack = mallocarray(STACK_SIZE, sizeof(*s->stack));
+	s->stack = calloc(STACK_SIZE, sizeof(*s->stack));
 	if (s->stack == NULL) {
 		goto exit;
 	}
@@ -1010,7 +1010,7 @@ static int ebitmap_to_names(struct ebitmap *map, char **vals_to_names, char ***n
 		goto exit;
 	}
 
-	name_arr = mallocarray(num, sizeof(*name_arr));
+	name_arr = calloc(num, sizeof(*name_arr));
 	if (name_arr == NULL) {
 		log_err("Out of memory");
 		rc = -1;

libsepol/src/optimize.c

@@ -45,7 +45,7 @@ static int type_vec_init(struct type_vec *v)
 {
 	v->capacity = TYPE_VEC_INIT_SIZE;
 	v->count = 0;
-	v->types = mallocarray(v->capacity, sizeof(*v->types));
+	v->types = calloc(v->capacity, sizeof(*v->types));
 	if (!v->types)
 		return -1;
 	return 0;
@@ -97,7 +97,7 @@ static struct type_vec *build_type_map(const policydb_t *p)
 {
 	unsigned int i, k;
 	ebitmap_node_t *n;
-	struct type_vec *map = mallocarray(p->p_types.nprim, sizeof(*map));
+	struct type_vec *map = calloc(p->p_types.nprim, sizeof(*map));
 	if (!map)
 		return NULL;
 

libsepol/src/policydb.c

@@ -4127,7 +4127,7 @@ static int scope_read(policydb_t * p, int symnum, struct policy_file *fp)
 		goto cleanup;
 	}
 	if ((scope->decl_ids =
-	     mallocarray(scope->decl_ids_len, sizeof(uint32_t))) == NULL) {
+	     calloc(scope->decl_ids_len, sizeof(uint32_t))) == NULL) {
 		goto cleanup;
 	}
 	rc = next_entry(scope->decl_ids, fp, sizeof(uint32_t) * scope->decl_ids_len);
@@ -4518,14 +4518,10 @@ int policydb_read(policydb_t * p, struct policy_file *fp, unsigned verbose)
 	}
 
 	if (policy_type == POLICY_KERN) {
-		p->type_attr_map = mallocarray(p->p_types.nprim, sizeof(ebitmap_t));
-		p->attr_type_map = mallocarray(p->p_types.nprim, sizeof(ebitmap_t));
+		p->type_attr_map = calloc(p->p_types.nprim, sizeof(ebitmap_t));
+		p->attr_type_map = calloc(p->p_types.nprim, sizeof(ebitmap_t));
 		if (!p->type_attr_map || !p->attr_type_map)
 			goto bad;
-		for (i = 0; i < p->p_types.nprim; i++) {
-			ebitmap_init(&p->type_attr_map[i]);
-			ebitmap_init(&p->attr_type_map[i]);
-		}
 		for (i = 0; i < p->p_types.nprim; i++) {
 			if (r_policyvers >= POLICYDB_VERSION_AVTAB) {
 				if (ebitmap_read(&p->type_attr_map[i], fp))

libsepol/src/private.h

@@ -84,15 +84,6 @@ extern size_t put_entry(const void *ptr, size_t size, size_t n,
 		        struct policy_file *fp);
 extern int str_read(char **strp, struct policy_file *fp, size_t len);
 
-static inline void* mallocarray(size_t nmemb, size_t size) {
-	if (size && nmemb > (size_t)-1 / size) {
-		errno = ENOMEM;
-		return NULL;
-	}
-
-	return malloc(nmemb * size);
-}
-
 #ifndef HAVE_REALLOCARRAY
 static inline void* reallocarray(void *ptr, size_t nmemb, size_t size) {
 	if (size && nmemb > (size_t)-1 / size) {

libsepol/src/services.c

@@ -712,7 +712,7 @@ mls_ops:
 	 * Generate the same number of answer buffer entries as expression
 	 * buffers (as there will never be more).
 	 */
-	answer_list = mallocarray(expr_count, sizeof(*answer_list));
+	answer_list = calloc(expr_count, sizeof(*answer_list));
 	if (!answer_list) {
 		ERR(NULL, "failed to allocate answer stack");
 		rc = -ENOMEM;
@@ -2169,12 +2169,11 @@ int sepol_get_user_sids(sepol_security_id_t fromsid,
 	}
 	usercon.user = user->s.value;
 
-	mysids = mallocarray(maxnel, sizeof(sepol_security_id_t));
+	mysids = calloc(maxnel, sizeof(sepol_security_id_t));
 	if (!mysids) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(mysids, 0, maxnel * sizeof(sepol_security_id_t));
 
 	ebitmap_for_each_positive_bit(&user->roles.roles, rnode, i) {
 		role = policydb->role_val_to_struct[i];
@@ -2204,17 +2203,12 @@ int sepol_get_user_sids(sepol_security_id_t fromsid,
 				mysids[mynel++] = sid;
 			} else {
 				maxnel += SIDS_NEL;
-				mysids2 =
-				    mallocarray(maxnel,
-					   sizeof(sepol_security_id_t));
-
+				mysids2 = calloc(maxnel, sizeof(sepol_security_id_t));
 				if (!mysids2) {
 					rc = -ENOMEM;
 					free(mysids);
 					goto out;
 				}
-				memset(mysids2, 0,
-				       maxnel * sizeof(sepol_security_id_t));
 				memcpy(mysids2, mysids,
 				       mynel * sizeof(sepol_security_id_t));
 				free(mysids);

libsepol/src/sidtab.c

@@ -26,13 +26,9 @@
 
 int sepol_sidtab_init(sidtab_t * s)
 {
-	int i;
-
-	s->htable = mallocarray(SIDTAB_SIZE, sizeof(sidtab_ptr_t));
+	s->htable = calloc(SIDTAB_SIZE, sizeof(sidtab_ptr_t));
 	if (!s->htable)
 		return -ENOMEM;
-	for (i = 0; i < SIDTAB_SIZE; i++)
-		s->htable[i] = (sidtab_ptr_t) NULL;
 	s->nel = 0;
 	s->next_sid = 1;
 	s->shutdown = 0;

libsepol/src/user_record.c

@@ -267,7 +267,7 @@ int sepol_user_get_roles(sepol_handle_t * handle,
 
 	unsigned int i;
 	const char **tmp_roles =
-	    (const char **)mallocarray(user->num_roles, sizeof(char *));
+	    (const char **)calloc(user->num_roles, sizeof(char *));
 	if (!tmp_roles)
 		goto omem;
 

libsepol/src/write.c

@@ -2117,7 +2117,7 @@ static int scope_write(hashtab_key_t key, hashtab_datum_t datum, void *ptr)
 		 * buffer.  this would have been easier with C99's
 		 * dynamic arrays... */
 		rc = POLICYDB_ERROR;
-		dyn_buf = mallocarray(items, sizeof(*dyn_buf));
+		dyn_buf = calloc(items, sizeof(*dyn_buf));
 		if (!dyn_buf)
 			goto err;
 		buf = dyn_buf;