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Diffstat (limited to 'security/selinux/ss/mls.c')
-rw-r--r--security/selinux/ss/mls.c101
1 files changed, 43 insertions, 58 deletions
diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c
index 99571b19d4a9..a6e49269f535 100644
--- a/security/selinux/ss/mls.c
+++ b/security/selinux/ss/mls.c
@@ -2,21 +2,17 @@
/*
* Implementation of the multi-level security (MLS) policy.
*
- * Author : Stephen Smalley, <sds@tycho.nsa.gov>
+ * Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
*/
+
/*
* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
+ * Support for enhanced MLS infrastructure.
+ * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
*
- * Support for enhanced MLS infrastructure.
- *
- * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
- */
-/*
* Updated: Hewlett-Packard <paul@paul-moore.com>
- *
- * Added support to import/export the MLS label from NetLabel
- *
- * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ * Added support to import/export the MLS label from NetLabel
+ * Copyright (C) Hewlett-Packard Development Company, L.P., 2006
*/
#include <linux/kernel.h>
@@ -45,14 +41,15 @@ int mls_compute_context_len(struct policydb *p, struct context *context)
len = 1; /* for the beginning ":" */
for (l = 0; l < 2; l++) {
- int index_sens = context->range.level[l].sens;
+ u32 index_sens = context->range.level[l].sens;
len += strlen(sym_name(p, SYM_LEVELS, index_sens - 1));
/* categories */
head = -2;
prev = -2;
e = &context->range.level[l].cat;
- ebitmap_for_each_positive_bit(e, node, i) {
+ ebitmap_for_each_positive_bit(e, node, i)
+ {
if (i - prev > 1) {
/* one or more negative bits are skipped */
if (head != prev) {
@@ -86,8 +83,7 @@ int mls_compute_context_len(struct policydb *p, struct context *context)
* the MLS fields of `context' into the string `*scontext'.
* Update `*scontext' to point to the end of the MLS fields.
*/
-void mls_sid_to_context(struct policydb *p,
- struct context *context,
+void mls_sid_to_context(struct policydb *p, struct context *context,
char **scontext)
{
char *scontextp, *nm;
@@ -112,7 +108,8 @@ void mls_sid_to_context(struct policydb *p,
head = -2;
prev = -2;
e = &context->range.level[l].cat;
- ebitmap_for_each_positive_bit(e, node, i) {
+ ebitmap_for_each_positive_bit(e, node, i)
+ {
if (i - prev > 1) {
/* one or more negative bits are skipped */
if (prev != head) {
@@ -174,7 +171,7 @@ int mls_level_isvalid(struct policydb *p, struct mls_level *l)
* levdatum->level->cat and no bit in l->cat is larger than
* p->p_cats.nprim.
*/
- return ebitmap_contains(&levdatum->level->cat, &l->cat,
+ return ebitmap_contains(&levdatum->level.cat, &l->cat,
p->p_cats.nprim);
}
@@ -230,17 +227,14 @@ int mls_context_isvalid(struct policydb *p, struct context *c)
* Policy read-lock must be held for sidtab lookup.
*
*/
-int mls_context_to_sid(struct policydb *pol,
- char oldc,
- char *scontext,
- struct context *context,
- struct sidtab *s,
- u32 def_sid)
+int mls_context_to_sid(struct policydb *pol, char oldc, char *scontext,
+ struct context *context, struct sidtab *s, u32 def_sid)
{
char *sensitivity, *cur_cat, *next_cat, *rngptr;
struct level_datum *levdatum;
struct cat_datum *catdatum, *rngdatum;
- int l, rc, i;
+ u32 i;
+ int l, rc;
char *rangep[2];
if (!pol->mls_enabled) {
@@ -295,7 +289,7 @@ int mls_context_to_sid(struct policydb *pol,
levdatum = symtab_search(&pol->p_levels, sensitivity);
if (!levdatum)
return -EINVAL;
- context->range.level[l].sens = levdatum->level->sens;
+ context->range.level[l].sens = levdatum->level.sens;
/* Extract category set. */
while (next_cat != NULL) {
@@ -332,7 +326,8 @@ int mls_context_to_sid(struct policydb *pol,
return -EINVAL;
for (i = catdatum->value; i < rngdatum->value; i++) {
- rc = ebitmap_set_bit(&context->range.level[l].cat, i, 1);
+ rc = ebitmap_set_bit(
+ &context->range.level[l].cat, i, 1);
if (rc)
return rc;
}
@@ -370,8 +365,8 @@ int mls_from_string(struct policydb *p, char *str, struct context *context,
if (!tmpstr) {
rc = -ENOMEM;
} else {
- rc = mls_context_to_sid(p, ':', tmpstr, context,
- NULL, SECSID_NULL);
+ rc = mls_context_to_sid(p, ':', tmpstr, context, NULL,
+ SECSID_NULL);
kfree(tmpstr);
}
@@ -381,8 +376,7 @@ int mls_from_string(struct policydb *p, char *str, struct context *context,
/*
* Copies the MLS range `range' into `context'.
*/
-int mls_range_set(struct context *context,
- struct mls_range *range)
+int mls_range_set(struct context *context, struct mls_range *range)
{
int l, rc = 0;
@@ -398,9 +392,8 @@ int mls_range_set(struct context *context,
return rc;
}
-int mls_setup_user_range(struct policydb *p,
- struct context *fromcon, struct user_datum *user,
- struct context *usercon)
+int mls_setup_user_range(struct policydb *p, struct context *fromcon,
+ struct user_datum *user, struct context *usercon)
{
if (p->mls_enabled) {
struct mls_level *fromcon_sen = &(fromcon->range.level[0]);
@@ -443,15 +436,14 @@ int mls_setup_user_range(struct policydb *p,
* policy `oldp' to the values specified in the policy `newp',
* storing the resulting context in `newc'.
*/
-int mls_convert_context(struct policydb *oldp,
- struct policydb *newp,
- struct context *oldc,
- struct context *newc)
+int mls_convert_context(struct policydb *oldp, struct policydb *newp,
+ struct context *oldc, struct context *newc)
{
struct level_datum *levdatum;
struct cat_datum *catdatum;
struct ebitmap_node *node;
- int l, i;
+ u32 i;
+ int l;
if (!oldp->mls_enabled || !newp->mls_enabled)
return 0;
@@ -464,10 +456,11 @@ int mls_convert_context(struct policydb *oldp,
if (!levdatum)
return -EINVAL;
- newc->range.level[l].sens = levdatum->level->sens;
+ newc->range.level[l].sens = levdatum->level.sens;
- ebitmap_for_each_positive_bit(&oldc->range.level[l].cat,
- node, i) {
+ ebitmap_for_each_positive_bit(&oldc->range.level[l].cat, node,
+ i)
+ {
int rc;
catdatum = symtab_search(&newp->p_cats,
@@ -484,18 +477,14 @@ int mls_convert_context(struct policydb *oldp,
return 0;
}
-int mls_compute_sid(struct policydb *p,
- struct context *scontext,
- struct context *tcontext,
- u16 tclass,
- u32 specified,
- struct context *newcontext,
- bool sock)
+int mls_compute_sid(struct policydb *p, struct context *scontext,
+ struct context *tcontext, u16 tclass, u32 specified,
+ struct context *newcontext, bool sock)
{
struct range_trans rtr;
struct mls_range *r;
struct class_datum *cladatum;
- int default_range = 0;
+ char default_range = 0;
if (!p->mls_enabled)
return 0;
@@ -530,8 +519,8 @@ int mls_compute_sid(struct policydb *p,
case DEFAULT_TARGET_LOW_HIGH:
return mls_context_cpy(newcontext, tcontext);
case DEFAULT_GLBLUB:
- return mls_context_glblub(newcontext,
- scontext, tcontext);
+ return mls_context_glblub(newcontext, scontext,
+ tcontext);
}
fallthrough;
@@ -561,8 +550,7 @@ int mls_compute_sid(struct policydb *p,
* NetLabel MLS sensitivity level field.
*
*/
-void mls_export_netlbl_lvl(struct policydb *p,
- struct context *context,
+void mls_export_netlbl_lvl(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr)
{
if (!p->mls_enabled)
@@ -583,8 +571,7 @@ void mls_export_netlbl_lvl(struct policydb *p,
* NetLabel MLS sensitivity level into the context.
*
*/
-void mls_import_netlbl_lvl(struct policydb *p,
- struct context *context,
+void mls_import_netlbl_lvl(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr)
{
if (!p->mls_enabled)
@@ -605,8 +592,7 @@ void mls_import_netlbl_lvl(struct policydb *p,
* MLS category field. Returns zero on success, negative values on failure.
*
*/
-int mls_export_netlbl_cat(struct policydb *p,
- struct context *context,
+int mls_export_netlbl_cat(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr)
{
int rc;
@@ -635,8 +621,7 @@ int mls_export_netlbl_cat(struct policydb *p,
* negative values on failure.
*
*/
-int mls_import_netlbl_cat(struct policydb *p,
- struct context *context,
+int mls_import_netlbl_cat(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr)
{
int rc;
generated by cgit (git 2.34.1) at 2025-12-21 22:01:01 +0000