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selinux: constify source policy in cond_policydb_dup()

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cond_policydb_dup() duplicates conditional parts of an existing policy.
Declare the source policy const, since it should not be modified.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
[PM: various line length fixups]
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Christian Göttsche 2024-04-05 18:10:12 +02:00 committed by Paul Moore
parent 851541709a
commit 581646c3fb
4 changed files with 17 additions and 14 deletions
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15
security/selinux/ss/conditional.c
View file

@ -603,7 +603,8 @@ void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
}
}
static int cond_dup_av_list(struct cond_av_list *new, struct cond_av_list *orig,
static int cond_dup_av_list(struct cond_av_list *new,
const struct cond_av_list *orig,
struct avtab *avtab)
{
u32 i;
@ -626,7 +627,7 @@ static int cond_dup_av_list(struct cond_av_list *new, struct cond_av_list *orig,
}
static int duplicate_policydb_cond_list(struct policydb *newp,
struct policydb *origp)
const struct policydb *origp)
{
int rc;
u32 i;
@ -643,7 +644,7 @@ static int duplicate_policydb_cond_list(struct policydb *newp,
for (i = 0; i < origp->cond_list_len; i++) {
struct cond_node *newn = &newp->cond_list[i];
struct cond_node *orign = &origp->cond_list[i];
const struct cond_node *orign = &origp->cond_list[i];
newp->cond_list_len++;
@ -683,8 +684,8 @@ static int cond_bools_destroy(void *key, void *datum, void *args)
return 0;
}
static int cond_bools_copy(struct hashtab_node *new, struct hashtab_node *orig,
void *args)
static int cond_bools_copy(struct hashtab_node *new,
const struct hashtab_node *orig, void *args)
{
struct cond_bool_datum *datum;
@ -710,7 +711,7 @@ static int cond_bools_index(void *key, void *datum, void *args)
}
static int duplicate_policydb_bools(struct policydb *newdb,
struct policydb *orig)
const struct policydb *orig)
{
struct cond_bool_datum **cond_bool_array;
int rc;
@ -743,7 +744,7 @@ void cond_policydb_destroy_dup(struct policydb *p)
cond_policydb_destroy(p);
}
int cond_policydb_dup(struct policydb *new, struct policydb *orig)
int cond_policydb_dup(struct policydb *new, const struct policydb *orig)
{
cond_policydb_init(new);

2
security/selinux/ss/conditional.h
View file

@ -79,6 +79,6 @@ void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
struct extended_perms_decision *xpermd);
void evaluate_cond_nodes(struct policydb *p);
void cond_policydb_destroy_dup(struct policydb *p);
int cond_policydb_dup(struct policydb *new, struct policydb *orig);
int cond_policydb_dup(struct policydb *new, const struct policydb *orig);
#endif /* _CONDITIONAL_H_ */

10
security/selinux/ss/hashtab.c
View file

@ -136,11 +136,12 @@ void hashtab_stat(struct hashtab *h, struct hashtab_info *info)
}
#endif /* CONFIG_SECURITY_SELINUX_DEBUG */
int hashtab_duplicate(struct hashtab *new, struct hashtab *orig,
int hashtab_duplicate(struct hashtab *new, const struct hashtab *orig,
int (*copy)(struct hashtab_node *new,
struct hashtab_node *orig, void *args),
const struct hashtab_node *orig, void *args),
int (*destroy)(void *k, void *d, void *args), void *args)
{
const struct hashtab_node *orig_cur;
struct hashtab_node *cur, *tmp, *tail;
u32 i;
int rc;
@ -155,12 +156,13 @@ int hashtab_duplicate(struct hashtab *new, struct hashtab *orig,
for (i = 0; i < orig->size; i++) {
tail = NULL;
for (cur = orig->htable[i]; cur; cur = cur->next) {
for (orig_cur = orig->htable[i]; orig_cur;
orig_cur = orig_cur->next) {
tmp = kmem_cache_zalloc(hashtab_node_cachep,
GFP_KERNEL);
if (!tmp)
goto error;
rc = copy(tmp, cur, args);
rc = copy(tmp, orig_cur, args);
if (rc) {
kmem_cache_free(hashtab_node_cachep, tmp);
goto error;

4
security/selinux/ss/hashtab.h
View file

@ -136,9 +136,9 @@ void hashtab_destroy(struct hashtab *h);
int hashtab_map(struct hashtab *h, int (*apply)(void *k, void *d, void *args),
void *args);
int hashtab_duplicate(struct hashtab *new, struct hashtab *orig,
int hashtab_duplicate(struct hashtab *new, const struct hashtab *orig,
int (*copy)(struct hashtab_node *new,
struct hashtab_node *orig, void *args),
const struct hashtab_node *orig, void *args),
int (*destroy)(void *k, void *d, void *args), void *args);
#ifdef CONFIG_SECURITY_SELINUX_DEBUG