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From 69bfe64cdf659cc47c544e6b376f0a653ff06f6f Mon Sep 17 00:00:00 2001
From: James Carter <jwcart2@gmail.com>
Date: Tue, 30 Mar 2021 13:39:12 -0400
Subject: [PATCH] libsepol/cil: Reorder checks for invalid rules when building
AST
Reorder checks for invalid rules in the blocks of tunableifs,
in-statements, macros, and booleanifs when building the AST for
consistency.
Order the checks in the same order the blocks will be resolved in,
so tuanbleif, in-statement, macro, booleanif, and then non-block
rules.
Signed-off-by: James Carter <jwcart2@gmail.com>
---
libsepol/cil/src/cil_build_ast.c | 100 +++++++++++++++----------------
1 file changed, 50 insertions(+), 50 deletions(-)
diff --git a/libsepol/cil/src/cil_build_ast.c b/libsepol/cil/src/cil_build_ast.c
index a4a2baa0f53b..eee21086bba8 100644
--- a/libsepol/cil/src/cil_build_ast.c
+++ b/libsepol/cil/src/cil_build_ast.c
@@ -49,10 +49,10 @@
struct cil_args_build {
struct cil_tree_node *ast;
struct cil_db *db;
- struct cil_tree_node *macro;
- struct cil_tree_node *boolif;
struct cil_tree_node *tunif;
struct cil_tree_node *in;
+ struct cil_tree_node *macro;
+ struct cil_tree_node *boolif;
};
int cil_fill_list(struct cil_tree_node *current, enum cil_flavor flavor, struct cil_list **list)
@@ -6069,10 +6069,10 @@ int __cil_build_ast_node_helper(struct cil_tree_node *parse_current, uint32_t *f
struct cil_tree_node *ast_current = NULL;
struct cil_db *db = NULL;
struct cil_tree_node *ast_node = NULL;
- struct cil_tree_node *macro = NULL;
- struct cil_tree_node *boolif = NULL;
struct cil_tree_node *tunif = NULL;
struct cil_tree_node *in = NULL;
+ struct cil_tree_node *macro = NULL;
+ struct cil_tree_node *boolif = NULL;
int rc = SEPOL_ERR;
if (parse_current == NULL || finished == NULL || extra_args == NULL) {
@@ -6082,10 +6082,10 @@ int __cil_build_ast_node_helper(struct cil_tree_node *parse_current, uint32_t *f
args = extra_args;
ast_current = args->ast;
db = args->db;
- macro = args->macro;
- boolif = args->boolif;
tunif = args->tunif;
in = args->in;
+ macro = args->macro;
+ boolif = args->boolif;
if (parse_current->parent->cl_head != parse_current) {
/* ignore anything that isn't following a parenthesis */
@@ -6102,13 +6102,31 @@ int __cil_build_ast_node_helper(struct cil_tree_node *parse_current, uint32_t *f
goto exit;
}
+ if (tunif != NULL) {
+ if (parse_current->data == CIL_KEY_TUNABLE) {
+ rc = SEPOL_ERR;
+ cil_tree_log(parse_current, CIL_ERR, "Found tunable");
+ cil_log(CIL_ERR, "Tunables cannot be defined within tunableif statement\n");
+ goto exit;
+ }
+ }
+
+ if (in != NULL) {
+ if (parse_current->data == CIL_KEY_IN) {
+ rc = SEPOL_ERR;
+ cil_tree_log(parse_current, CIL_ERR, "Found in-statement");
+ cil_log(CIL_ERR, "in-statements cannot be defined within in-statements\n");
+ goto exit;
+ }
+ }
+
if (macro != NULL) {
- if (parse_current->data == CIL_KEY_MACRO ||
- parse_current->data == CIL_KEY_TUNABLE ||
+ if (parse_current->data == CIL_KEY_TUNABLE ||
parse_current->data == CIL_KEY_IN ||
parse_current->data == CIL_KEY_BLOCK ||
parse_current->data == CIL_KEY_BLOCKINHERIT ||
- parse_current->data == CIL_KEY_BLOCKABSTRACT) {
+ parse_current->data == CIL_KEY_BLOCKABSTRACT ||
+ parse_current->data == CIL_KEY_MACRO) {
rc = SEPOL_ERR;
cil_tree_log(parse_current, CIL_ERR, "%s is not allowed in macros", (char *)parse_current->data);
goto exit;
@@ -6116,15 +6134,15 @@ int __cil_build_ast_node_helper(struct cil_tree_node *parse_current, uint32_t *f
}
if (boolif != NULL) {
- if (parse_current->data != CIL_KEY_CONDTRUE &&
+ if (parse_current->data != CIL_KEY_TUNABLEIF &&
+ parse_current->data != CIL_KEY_CALL &&
+ parse_current->data != CIL_KEY_CONDTRUE &&
parse_current->data != CIL_KEY_CONDFALSE &&
- parse_current->data != CIL_KEY_AUDITALLOW &&
- parse_current->data != CIL_KEY_TUNABLEIF &&
parse_current->data != CIL_KEY_ALLOW &&
parse_current->data != CIL_KEY_DONTAUDIT &&
+ parse_current->data != CIL_KEY_AUDITALLOW &&
parse_current->data != CIL_KEY_TYPETRANSITION &&
- parse_current->data != CIL_KEY_TYPECHANGE &&
- parse_current->data != CIL_KEY_CALL) {
+ parse_current->data != CIL_KEY_TYPECHANGE) {
rc = SEPOL_ERR;
cil_tree_log(parse_current, CIL_ERR, "Found %s", (char*)parse_current->data);
if (((struct cil_booleanif*)boolif->data)->preserved_tunable) {
@@ -6138,24 +6156,6 @@ int __cil_build_ast_node_helper(struct cil_tree_node *parse_current, uint32_t *f
}
}
- if (tunif != NULL) {
- if (parse_current->data == CIL_KEY_TUNABLE) {
- rc = SEPOL_ERR;
- cil_tree_log(parse_current, CIL_ERR, "Found tunable");
- cil_log(CIL_ERR, "Tunables cannot be defined within tunableif statement\n");
- goto exit;
- }
- }
-
- if (in != NULL) {
- if (parse_current->data == CIL_KEY_IN) {
- rc = SEPOL_ERR;
- cil_tree_log(parse_current, CIL_ERR, "Found in-statement");
- cil_log(CIL_ERR, "in-statements cannot be defined within in-statements\n");
- goto exit;
- }
- }
-
cil_tree_node_init(&ast_node);
ast_node->parent = ast_current;
@@ -6441,14 +6441,6 @@ int __cil_build_ast_node_helper(struct cil_tree_node *parse_current, uint32_t *f
if (rc == SEPOL_OK) {
if (ast_current->cl_head == NULL) {
- if (ast_current->flavor == CIL_MACRO) {
- args->macro = ast_current;
- }
-
- if (ast_current->flavor == CIL_BOOLEANIF) {
- args->boolif = ast_current;
- }
-
if (ast_current->flavor == CIL_TUNABLEIF) {
args->tunif = ast_current;
}
@@ -6457,6 +6449,14 @@ int __cil_build_ast_node_helper(struct cil_tree_node *parse_current, uint32_t *f
args->in = ast_current;
}
+ if (ast_current->flavor == CIL_MACRO) {
+ args->macro = ast_current;
+ }
+
+ if (ast_current->flavor == CIL_BOOLEANIF) {
+ args->boolif = ast_current;
+ }
+
ast_current->cl_head = ast_node;
} else {
ast_current->cl_tail->next = ast_node;
@@ -6492,14 +6492,6 @@ int __cil_build_ast_last_child_helper(struct cil_tree_node *parse_current, void
args->ast = ast->parent;
- if (ast->flavor == CIL_MACRO) {
- args->macro = NULL;
- }
-
- if (ast->flavor == CIL_BOOLEANIF) {
- args->boolif = NULL;
- }
-
if (ast->flavor == CIL_TUNABLEIF) {
args->tunif = NULL;
}
@@ -6508,6 +6500,14 @@ int __cil_build_ast_last_child_helper(struct cil_tree_node *parse_current, void
args->in = NULL;
}
+ if (ast->flavor == CIL_MACRO) {
+ args->macro = NULL;
+ }
+
+ if (ast->flavor == CIL_BOOLEANIF) {
+ args->boolif = NULL;
+ }
+
// At this point we no longer have any need for parse_current or any of its
// siblings; they have all been converted to the appropriate AST node. The
// full parse tree will get deleted elsewhere, but in an attempt to
@@ -6532,10 +6532,10 @@ int cil_build_ast(struct cil_db *db, struct cil_tree_node *parse_tree, struct ci
extra_args.ast = ast;
extra_args.db = db;
- extra_args.macro = NULL;
- extra_args.boolif = NULL;
extra_args.tunif = NULL;
extra_args.in = NULL;
+ extra_args.macro = NULL;
+ extra_args.boolif = NULL;
rc = cil_tree_walk(parse_tree, __cil_build_ast_node_helper, NULL, __cil_build_ast_last_child_helper, &extra_args);
if (rc != SEPOL_OK) {
--
2.32.0
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