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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] xsm/flask/ss: CFI hardening
commit c9e0a06259aff799b57b3180ba815081c914f4e8
Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Oct 29 15:32:08 2021 +0100
Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Feb 23 15:33:43 2022 +0000
xsm/flask/ss: CFI hardening
Control Flow Integrity schemes use toolchain and optionally hardware support
to help protect against call/jump/return oriented programming attacks.
Use cf_check to annotate function pointer targets for the toolchain.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
xen/xsm/flask/ss/avtab.c | 4 ++--
xen/xsm/flask/ss/conditional.c | 10 ++++----
xen/xsm/flask/ss/conditional.h | 6 ++---
xen/xsm/flask/ss/policydb.c | 53 ++++++++++++++++++++++--------------------
xen/xsm/flask/ss/services.c | 6 ++---
xen/xsm/flask/ss/symtab.c | 5 ++--
6 files changed, 44 insertions(+), 40 deletions(-)
diff --git a/xen/xsm/flask/ss/avtab.c b/xen/xsm/flask/ss/avtab.c
index bfc91c8b0c..55c2b4d8a4 100644
--- a/xen/xsm/flask/ss/avtab.c
+++ b/xen/xsm/flask/ss/avtab.c
@@ -482,8 +482,8 @@ int avtab_read_item(struct avtab *a, void *fp, struct
policydb *pol,
return insertf(a, &key, &datum, p);
}
-static int avtab_insertf(struct avtab *a, struct avtab_key *k,
- struct avtab_datum *d, void *p)
+static int cf_check avtab_insertf(
+ struct avtab *a, struct avtab_key *k, struct avtab_datum *d, void *p)
{
return avtab_insert(a, k, d);
}
diff --git a/xen/xsm/flask/ss/conditional.c b/xen/xsm/flask/ss/conditional.c
index 3e58aea551..b4b116666c 100644
--- a/xen/xsm/flask/ss/conditional.c
+++ b/xen/xsm/flask/ss/conditional.c
@@ -189,14 +189,14 @@ int cond_init_bool_indexes(struct policydb *p)
return 0;
}
-int cond_destroy_bool(void *key, void *datum, void *p)
+int cf_check cond_destroy_bool(void *key, void *datum, void *p)
{
xfree(key);
xfree(datum);
return 0;
}
-int cond_index_bool(void *key, void *datum, void *datap)
+int cf_check cond_index_bool(void *key, void *datum, void *datap)
{
struct policydb *p;
struct cond_bool_datum *booldatum;
@@ -220,7 +220,7 @@ static int bool_isvalid(struct cond_bool_datum *b)
return 1;
}
-int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp)
+int cf_check cond_read_bool(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct cond_bool_datum *booldatum;
@@ -268,8 +268,8 @@ struct cond_insertf_data
struct cond_av_list *tail;
};
-static int cond_insertf(struct avtab *a, struct avtab_key *k,
- struct avtab_datum *d, void *ptr)
+static int cf_check cond_insertf(
+ struct avtab *a, struct avtab_key *k, struct avtab_datum *d, void *ptr)
{
struct cond_insertf_data *data = ptr;
struct policydb *p = data->p;
diff --git a/xen/xsm/flask/ss/conditional.h b/xen/xsm/flask/ss/conditional.h
index 59ac6b4b57..500fe4305a 100644
--- a/xen/xsm/flask/ss/conditional.h
+++ b/xen/xsm/flask/ss/conditional.h
@@ -63,11 +63,11 @@ int cond_policydb_init(struct policydb* p);
void cond_policydb_destroy(struct policydb* p);
int cond_init_bool_indexes(struct policydb* p);
-int cond_destroy_bool(void *key, void *datum, void *p);
+int cf_check cond_destroy_bool(void *key, void *datum, void *p);
-int cond_index_bool(void *key, void *datum, void *datap);
+int cf_check cond_index_bool(void *key, void *datum, void *datap);
-int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp);
+int cf_check cond_read_bool(struct policydb *p, struct hashtab *h, void *fp);
int cond_read_list(struct policydb *p, void *fp);
void cond_compute_av(struct avtab *ctab, struct avtab_key *key, struct
av_decision *avd);
diff --git a/xen/xsm/flask/ss/policydb.c b/xen/xsm/flask/ss/policydb.c
index 9426164353..ff2103c63e 100644
--- a/xen/xsm/flask/ss/policydb.c
+++ b/xen/xsm/flask/ss/policydb.c
@@ -257,12 +257,12 @@ out_free_symtab:
* of a class, role, or user are needed.
*/
-static int common_index(void *key, void *datum, void *datap)
+static int cf_check common_index(void *key, void *datum, void *datap)
{
return 0;
}
-static int class_index(void *key, void *datum, void *datap)
+static int cf_check class_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct class_datum *cladatum;
@@ -276,7 +276,7 @@ static int class_index(void *key, void *datum, void *datap)
return 0;
}
-static int role_index(void *key, void *datum, void *datap)
+static int cf_check role_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct role_datum *role;
@@ -292,7 +292,7 @@ static int role_index(void *key, void *datum, void *datap)
return 0;
}
-static int type_index(void *key, void *datum, void *datap)
+static int cf_check type_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct type_datum *typdatum;
@@ -313,7 +313,7 @@ static int type_index(void *key, void *datum, void *datap)
return 0;
}
-static int user_index(void *key, void *datum, void *datap)
+static int cf_check user_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct user_datum *usrdatum;
@@ -329,7 +329,7 @@ static int user_index(void *key, void *datum, void *datap)
return 0;
}
-static int sens_index(void *key, void *datum, void *datap)
+static int cf_check sens_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct level_datum *levdatum;
@@ -348,7 +348,7 @@ static int sens_index(void *key, void *datum, void *datap)
return 0;
}
-static int cat_index(void *key, void *datum, void *datap)
+static int cf_check cat_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct cat_datum *catdatum;
@@ -506,14 +506,14 @@ out:
* symbol data in the policy database.
*/
-static int perm_destroy(void *key, void *datum, void *p)
+static int cf_check perm_destroy(void *key, void *datum, void *p)
{
xfree(key);
xfree(datum);
return 0;
}
-static int common_destroy(void *key, void *datum, void *p)
+static int cf_check common_destroy(void *key, void *datum, void *p)
{
struct common_datum *comdatum;
@@ -525,7 +525,7 @@ static int common_destroy(void *key, void *datum, void *p)
return 0;
}
-static int class_destroy(void *key, void *datum, void *p)
+static int cf_check class_destroy(void *key, void *datum, void *p)
{
struct class_datum *cladatum;
struct constraint_node *constraint, *ctemp;
@@ -572,7 +572,7 @@ static int class_destroy(void *key, void *datum, void *p)
return 0;
}
-static int role_destroy(void *key, void *datum, void *p)
+static int cf_check role_destroy(void *key, void *datum, void *p)
{
struct role_datum *role;
@@ -584,14 +584,14 @@ static int role_destroy(void *key, void *datum, void *p)
return 0;
}
-static int type_destroy(void *key, void *datum, void *p)
+static int cf_check type_destroy(void *key, void *datum, void *p)
{
xfree(key);
xfree(datum);
return 0;
}
-static int user_destroy(void *key, void *datum, void *p)
+static int cf_check user_destroy(void *key, void *datum, void *p)
{
struct user_datum *usrdatum;
@@ -605,7 +605,7 @@ static int user_destroy(void *key, void *datum, void *p)
return 0;
}
-static int sens_destroy(void *key, void *datum, void *p)
+static int cf_check sens_destroy(void *key, void *datum, void *p)
{
struct level_datum *levdatum;
@@ -617,7 +617,7 @@ static int sens_destroy(void *key, void *datum, void *p)
return 0;
}
-static int cat_destroy(void *key, void *datum, void *p)
+static int cf_check cat_destroy(void *key, void *datum, void *p)
{
xfree(key);
xfree(datum);
@@ -989,7 +989,7 @@ bad:
goto out;
}
-static int common_read(struct policydb *p, struct hashtab *h, void *fp)
+static int cf_check common_read(struct policydb *p, struct hashtab *h, void
*fp)
{
char *key = NULL;
struct common_datum *comdatum;
@@ -1151,7 +1151,7 @@ static int read_cons_helper(struct policydb *p, struct
constraint_node **nodep,
return 0;
}
-static int class_read(struct policydb *p, struct hashtab *h, void *fp)
+static int cf_check class_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct class_datum *cladatum;
@@ -1250,7 +1250,7 @@ bad:
goto out;
}
-static int role_read(struct policydb *p, struct hashtab *h, void *fp)
+static int cf_check role_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct role_datum *role;
@@ -1321,7 +1321,7 @@ bad:
goto out;
}
-static int type_read(struct policydb *p, struct hashtab *h, void *fp)
+static int cf_check type_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct type_datum *typdatum;
@@ -1415,7 +1415,7 @@ bad:
return -EINVAL;
}
-static int user_read(struct policydb *p, struct hashtab *h, void *fp)
+static int cf_check user_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct user_datum *usrdatum;
@@ -1479,7 +1479,7 @@ bad:
goto out;
}
-static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
+static int cf_check sens_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct level_datum *levdatum;
@@ -1534,7 +1534,7 @@ bad:
goto out;
}
-static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
+static int cf_check cat_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct cat_datum *catdatum;
@@ -1591,7 +1591,8 @@ static int (*read_f[SYM_NUM]) (struct policydb *p, struct
hashtab *h, void *fp)
cat_read,
};
-static int user_bounds_sanity_check(void *key, void *datum, void *datap)
+static int cf_check user_bounds_sanity_check(
+ void *key, void *datum, void *datap)
{
struct user_datum *upper, *user;
struct policydb *p = datap;
@@ -1631,7 +1632,8 @@ static int user_bounds_sanity_check(void *key, void
*datum, void *datap)
return 0;
}
-static int role_bounds_sanity_check(void *key, void *datum, void *datap)
+static int cf_check role_bounds_sanity_check(
+ void *key, void *datum, void *datap)
{
struct role_datum *upper, *role;
struct policydb *p = datap;
@@ -1671,7 +1673,8 @@ static int role_bounds_sanity_check(void *key, void
*datum, void *datap)
return 0;
}
-static int type_bounds_sanity_check(void *key, void *datum, void *datap)
+static int cf_check type_bounds_sanity_check(
+ void *key, void *datum, void *datap)
{
struct type_datum *upper, *type;
struct policydb *p = datap;
diff --git a/xen/xsm/flask/ss/services.c b/xen/xsm/flask/ss/services.c
index 42686535f2..2f6d3d350d 100644
--- a/xen/xsm/flask/ss/services.c
+++ b/xen/xsm/flask/ss/services.c
@@ -283,7 +283,7 @@ mls_ops:
* security_dump_masked_av - dumps masked permissions during
* security_compute_av due to RBAC, MLS/Constraint and Type bounds.
*/
-static int dump_masked_av_helper(void *k, void *d, void *args)
+static int cf_check dump_masked_av_helper(void *k, void *d, void *args)
{
struct perm_datum *pdatum = d;
char **permission_names = args;
@@ -1240,7 +1240,7 @@ static int validate_classes(struct policydb *p)
}
/* Clone the SID into the new SID table. */
-static int clone_sid(u32 sid, struct context *context, void *arg)
+static int cf_check clone_sid(u32 sid, struct context *context, void *arg)
{
struct sidtab *s = arg;
@@ -1277,7 +1277,7 @@ struct convert_context_args {
* in the policy `p->newp'. Verify that the
* context is valid under the new policy.
*/
-static int convert_context(u32 key, struct context *c, void *p)
+static int cf_check convert_context(u32 key, struct context *c, void *p)
{
struct convert_context_args *args;
struct context oldc;
diff --git a/xen/xsm/flask/ss/symtab.c b/xen/xsm/flask/ss/symtab.c
index d98c116d5b..0ce7e08c24 100644
--- a/xen/xsm/flask/ss/symtab.c
+++ b/xen/xsm/flask/ss/symtab.c
@@ -12,7 +12,7 @@
#include <xen/errno.h>
#include "symtab.h"
-static unsigned int symhash(struct hashtab *h, const void *key)
+static unsigned int cf_check symhash(struct hashtab *h, const void *key)
{
const char *p, *keyp;
unsigned int size;
@@ -26,7 +26,8 @@ static unsigned int symhash(struct hashtab *h, const void
*key)
return val & (h->size - 1);
}
-static int symcmp(struct hashtab *h, const void *key1, const void *key2)
+static int cf_check symcmp(
+ struct hashtab *h, const void *key1, const void *key2)
{
const char *keyp1, *keyp2;
--
generated by git-patchbot for /home/xen/git/xen.git#master
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