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Diffstat (limited to 'security/selinux/ss/services.c')
-rw-r--r--security/selinux/ss/services.c63
1 files changed, 39 insertions, 24 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 5e08ce2c5994..4a907e008a98 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -66,6 +66,17 @@
#include "audit.h"
#include "policycap_names.h"
+struct convert_context_args {
+ struct selinux_state *state;
+ struct policydb *oldp;
+ struct policydb *newp;
+};
+
+struct selinux_policy_convert_data {
+ struct convert_context_args args;
+ struct sidtab_convert_params sidtab_params;
+};
+
/* Forward declaration. */
static int context_struct_to_string(struct policydb *policydb,
struct context *context,
@@ -1973,12 +1984,6 @@ static inline int convert_context_handle_invalid_context(
return 0;
}
-struct convert_context_args {
- struct selinux_state *state;
- struct policydb *oldp;
- struct policydb *newp;
-};
-
/*
* Convert the values in the security context
* structure `oldc' from the values specified
@@ -2158,7 +2163,7 @@ static void selinux_policy_cond_free(struct selinux_policy *policy)
}
void selinux_policy_cancel(struct selinux_state *state,
- struct selinux_policy *policy)
+ struct selinux_load_state *load_state)
{
struct selinux_policy *oldpolicy;
@@ -2166,7 +2171,8 @@ void selinux_policy_cancel(struct selinux_state *state,
lockdep_is_held(&state->policy_mutex));
sidtab_cancel_convert(oldpolicy->sidtab);
- selinux_policy_free(policy);
+ selinux_policy_free(load_state->policy);
+ kfree(load_state->convert_data);
}
static void selinux_notify_policy_change(struct selinux_state *state,
@@ -2181,9 +2187,9 @@ static void selinux_notify_policy_change(struct selinux_state *state,
}
void selinux_policy_commit(struct selinux_state *state,
- struct selinux_policy *newpolicy)
+ struct selinux_load_state *load_state)
{
- struct selinux_policy *oldpolicy;
+ struct selinux_policy *oldpolicy, *newpolicy = load_state->policy;
u32 seqno;
oldpolicy = rcu_dereference_protected(state->policy,
@@ -2223,6 +2229,7 @@ void selinux_policy_commit(struct selinux_state *state,
/* Free the old policy */
synchronize_rcu();
selinux_policy_free(oldpolicy);
+ kfree(load_state->convert_data);
/* Notify others of the policy change */
selinux_notify_policy_change(state, seqno);
@@ -2239,11 +2246,10 @@ void selinux_policy_commit(struct selinux_state *state,
* loading the new policy.
*/
int security_load_policy(struct selinux_state *state, void *data, size_t len,
- struct selinux_policy **newpolicyp)
+ struct selinux_load_state *load_state)
{
struct selinux_policy *newpolicy, *oldpolicy;
- struct sidtab_convert_params convert_params;
- struct convert_context_args args;
+ struct selinux_policy_convert_data *convert_data;
int rc = 0;
struct policy_file file = { data, len }, *fp = &file;
@@ -2273,10 +2279,10 @@ int security_load_policy(struct selinux_state *state, void *data, size_t len,
goto err_mapping;
}
-
if (!selinux_initialized(state)) {
/* First policy load, so no need to preserve state from old policy */
- *newpolicyp = newpolicy;
+ load_state->policy = newpolicy;
+ load_state->convert_data = NULL;
return 0;
}
@@ -2290,29 +2296,38 @@ int security_load_policy(struct selinux_state *state, void *data, size_t len,
goto err_free_isids;
}
+ convert_data = kmalloc(sizeof(*convert_data), GFP_KERNEL);
+ if (!convert_data) {
+ rc = -ENOMEM;
+ goto err_free_isids;
+ }
+
/*
* Convert the internal representations of contexts
* in the new SID table.
*/
- args.state = state;
- args.oldp = &oldpolicy->policydb;
- args.newp = &newpolicy->policydb;
+ convert_data->args.state = state;
+ convert_data->args.oldp = &oldpolicy->policydb;
+ convert_data->args.newp = &newpolicy->policydb;
- convert_params.func = convert_context;
- convert_params.args = &args;
- convert_params.target = newpolicy->sidtab;
+ convert_data->sidtab_params.func = convert_context;
+ convert_data->sidtab_params.args = &convert_data->args;
+ convert_data->sidtab_params.target = newpolicy->sidtab;
- rc = sidtab_convert(oldpolicy->sidtab, &convert_params);
+ rc = sidtab_convert(oldpolicy->sidtab, &convert_data->sidtab_params);
if (rc) {
pr_err("SELinux: unable to convert the internal"
" representation of contexts in the new SID"
" table\n");
- goto err_free_isids;
+ goto err_free_convert_data;
}
- *newpolicyp = newpolicy;
+ load_state->policy = newpolicy;
+ load_state->convert_data = convert_data;
return 0;
+err_free_convert_data:
+ kfree(convert_data);
err_free_isids:
sidtab_destroy(newpolicy->sidtab);
err_mapping: