Since it is fixed-size after allocation and we know the size beforehand,
using a plain old array is simpler and more efficient.
While there, also fix signedness of some related variables/parameters.
Signed-off-by: Ondrej Mosnacek <omosnace@xxxxxxxxxx>
---
security/selinux/include/conditional.h | 6 +--
security/selinux/selinuxfs.c | 4 +-
security/selinux/ss/conditional.c | 54 ++++++++++----------------
security/selinux/ss/conditional.h | 3 +-
security/selinux/ss/policydb.c | 2 +-
security/selinux/ss/policydb.h | 3 +-
security/selinux/ss/services.c | 28 ++++++-------
7 files changed, 43 insertions(+), 57 deletions(-)
diff --git a/security/selinux/include/conditional.h b/security/selinux/include/conditional.h
index 0ab316f61da0..ffb9a33341f8 100644
--- a/security/selinux/include/conditional.h
+++ b/security/selinux/include/conditional.h
@@ -14,12 +14,12 @@
#include "security.h"
int security_get_bools(struct selinux_state *state,
- int *len, char ***names, int **values);
+ u32 *len, char ***names, int **values);
int security_set_bools(struct selinux_state *state,
- int len, int *values);
+ u32 len, int *values);
int security_get_bool_value(struct selinux_state *state,
- int index);
+ u32 index);
#endif
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 79c710911a3c..296ce86e8b1f 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1327,14 +1327,14 @@ static void sel_remove_entries(struct dentry *de)
static int sel_make_bools(struct selinux_fs_info *fsi)
{
- int i, ret;
+ int ret;
ssize_t len;
struct dentry *dentry = NULL;
struct dentry *dir = fsi->bool_dir;
struct inode *inode = NULL;
struct inode_security_struct *isec;
char **names = NULL, *page;
- int num;
+ u32 i, num;
int *values = NULL;
u32 sid;
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 04593062008d..c8a02c9b23ee 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -119,6 +119,7 @@ int cond_policydb_init(struct policydb *p)
p->bool_val_to_struct = NULL;
p->cond_list = NULL;
+ p->cond_list_len = 0;
rc = avtab_init(&p->te_cond_avtab);
if (rc)
@@ -147,27 +148,22 @@ static void cond_node_destroy(struct cond_node *node)
}
cond_av_list_destroy(node->true_list);
cond_av_list_destroy(node->false_list);
- kfree(node);
}
-static void cond_list_destroy(struct cond_node *list)
+static void cond_list_destroy(struct policydb *p)
{
- struct cond_node *next, *cur;
+ u32 i;
- if (list == NULL)
- return;
-
- for (cur = list; cur; cur = next) {
- next = cur->next;
- cond_node_destroy(cur);
- }
+ for (i = 0; i < p->cond_list_len; i++)
+ cond_node_destroy(&p->cond_list[i]);
+ kfree(p->cond_list);
}
void cond_policydb_destroy(struct policydb *p)
{
kfree(p->bool_val_to_struct);
avtab_destroy(&p->te_cond_avtab);
- cond_list_destroy(p->cond_list);
+ cond_list_destroy(p);
}
int cond_init_bool_indexes(struct policydb *p)
@@ -447,7 +443,6 @@ err:
int cond_read_list(struct policydb *p, void *fp)
{
- struct cond_node *node, *last = NULL;
__le32 buf[1];
u32 i, len;
int rc;
@@ -458,29 +453,24 @@ int cond_read_list(struct policydb *p, void *fp)
len = le32_to_cpu(buf[0]);
+ p->cond_list = kcalloc(len, sizeof(*p->cond_list), GFP_KERNEL);
+ if (!p->cond_list)
+ return rc;
+
rc = avtab_alloc(&(p->te_cond_avtab), p->te_avtab.nel);
if (rc)
goto err;
for (i = 0; i < len; i++) {
- rc = -ENOMEM;
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- if (!node)
- goto err;
-
- rc = cond_read_node(p, node, fp);
+ rc = cond_read_node(p, &p->cond_list[i], fp);
if (rc)
goto err;
-
- if (i == 0)
- p->cond_list = node;
- else
- last->next = node;
- last = node;
}
+
+ p->cond_list_len = len;
return 0;
err:
- cond_list_destroy(p->cond_list);
+ cond_list_destroy(p);
p->cond_list = NULL;
return rc;
}
@@ -585,23 +575,19 @@ static int cond_write_node(struct policydb *p, struct cond_node *node,
return 0;
}
-int cond_write_list(struct policydb *p, struct cond_node *list, void *fp)
+int cond_write_list(struct policydb *p, void *fp)
{
- struct cond_node *cur;
- u32 len;
+ u32 i;
__le32 buf[1];
int rc;
- len = 0;
- for (cur = list; cur != NULL; cur = cur->next)
- len++;
- buf[0] = cpu_to_le32(len);
+ buf[0] = cpu_to_le32(p->cond_list_len);
rc = put_entry(buf, sizeof(u32), 1, fp);
if (rc)
return rc;
- for (cur = list; cur != NULL; cur = cur->next) {
- rc = cond_write_node(p, cur, fp);
+ for (i = 0; i < p->cond_list_len; i++) {
+ rc = cond_write_node(p, &p->cond_list[i], fp);
if (rc)
return rc;
}
diff --git a/security/selinux/ss/conditional.h b/security/selinux/ss/conditional.h
index d86ef286ca84..e474bdd3a0ed 100644
--- a/security/selinux/ss/conditional.h
+++ b/security/selinux/ss/conditional.h
@@ -55,7 +55,6 @@ struct cond_node {
struct cond_expr *expr;
struct cond_av_list *true_list;
struct cond_av_list *false_list;
- struct cond_node *next;
};
int cond_policydb_init(struct policydb *p);
@@ -69,7 +68,7 @@ int cond_index_bool(void *key, void *datum, void *datap);
int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp);
int cond_read_list(struct policydb *p, void *fp);
int cond_write_bool(void *key, void *datum, void *ptr);
-int cond_write_list(struct policydb *p, struct cond_node *list, void *fp);
+int cond_write_list(struct policydb *p, void *fp);
void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
struct av_decision *avd, struct extended_perms *xperms);
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 2aa7f2e1a8e7..8ac9b9ffc83c 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -3483,7 +3483,7 @@ int policydb_write(struct policydb *p, void *fp)
if (rc)
return rc;
- rc = cond_write_list(p, p->cond_list, fp);
+ rc = cond_write_list(p, fp);
if (rc)
return rc;
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h
index 69b24191fa38..6459616f8487 100644
--- a/security/selinux/ss/policydb.h
+++ b/security/selinux/ss/policydb.h
@@ -272,8 +272,9 @@ struct policydb {
struct cond_bool_datum **bool_val_to_struct;
/* type enforcement conditional access vectors and transitions */
struct avtab te_cond_avtab;
- /* linked list indexing te_cond_avtab by conditional */
+ /* array indexing te_cond_avtab by conditional */
struct cond_node *cond_list;
+ u32 cond_list_len;
/* role allows */
struct role_allow *role_allow;
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index ff43a35bb874..8fc8ec317bb6 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -2868,10 +2868,11 @@ out:
}
int security_get_bools(struct selinux_state *state,
- int *len, char ***names, int **values)
+ u32 *len, char ***names, int **values)
{
struct policydb *policydb;
- int i, rc;
+ u32 i;
+ int rc;
if (!selinux_initialized(state)) {
*len = 0;
@@ -2925,12 +2926,11 @@ err:
}
-int security_set_bools(struct selinux_state *state, int len, int *values)
+int security_set_bools(struct selinux_state *state, u32 len, int *values)
{
struct policydb *policydb;
- int i, rc;
- int lenp, seqno = 0;
- struct cond_node *cur;
+ int rc;
+ u32 i, lenp, seqno = 0;
write_lock_irq(&state->ss->policy_rwlock);
@@ -2958,8 +2958,8 @@ int security_set_bools(struct selinux_state *state, int len, int *values)
policydb->bool_val_to_struct[i]->state = 0;
}
- for (cur = policydb->cond_list; cur; cur = cur->next)
- evaluate_cond_node(policydb, cur);
+ for (i = 0; i < policydb->cond_list_len; i++)
+ evaluate_cond_node(policydb, &policydb->cond_list[i]);
seqno = ++state->ss->latest_granting;
rc = 0;
@@ -2975,11 +2975,11 @@ out:
}
int security_get_bool_value(struct selinux_state *state,
- int index)
+ u32 index)
{
struct policydb *policydb;
int rc;
- int len;
+ u32 len;
read_lock(&state->ss->policy_rwlock);
@@ -2999,10 +2999,10 @@ out:
static int security_preserve_bools(struct selinux_state *state,
struct policydb *policydb)
{
- int rc, nbools = 0, *bvalues = NULL, i;
+ int rc, *bvalues = NULL;
char **bnames = NULL;
struct cond_bool_datum *booldatum;
- struct cond_node *cur;
+ u32 i, nbools = 0;
rc = security_get_bools(state, &nbools, &bnames, &bvalues);
if (rc)
@@ -3012,8 +3012,8 @@ static int security_preserve_bools(struct selinux_state *state,
if (booldatum)
booldatum->state = bvalues[i];
}
- for (cur = policydb->cond_list; cur; cur = cur->next)
- evaluate_cond_node(policydb, cur);
+ for (i = 0; i < policydb->cond_list_len; i++)
+ evaluate_cond_node(policydb, &policydb->cond_list[i]);
out:
if (bnames) {
--
2.24.1
