static struct aa_sfs_entry aa_sfs_entry_ns[] = {
AA_SFS_FILE_BOOLEAN("profile", 1),
AA_SFS_FILE_BOOLEAN("pivot_root", 0),
+ AA_SFS_FILE_STRING("mask", "userns_create"),
{ }
};
"io_uring",
"module",
"lsm",
- "unknown",
+ "namespace",
"unknown",
"unknown",
"unknown",
#define AA_CLASS_IO_URING 18
#define AA_CLASS_MODULE 19
#define AA_CLASS_DISPLAY_LSM 20
+#define AA_CLASS_NS 21
#define AA_CLASS_X 31
#define AA_CLASS_DBUS 32
#define OP_PROF_LOAD "profile_load"
#define OP_PROF_RM "profile_remove"
+#define OP_USERNS_CREATE "userns_create"
struct apparmor_audit_data {
int error;
u32 request);
+
+#define AA_USERNS_CREATE 8
+
+int aa_profile_ns_perm(struct aa_profile *profile,
+ struct apparmor_audit_data *ad, u32 request);
+
#endif /* __AA_TASK_H */
return error;
}
+static int apparmor_userns_create(const struct cred *cred)
+{
+ struct aa_label *label;
+ struct aa_profile *profile;
+ int error = 0;
+ DEFINE_AUDIT_DATA(ad, LSM_AUDIT_DATA_TASK, AA_CLASS_NS,
+ OP_USERNS_CREATE);
+
+ ad.subj_cred = current_cred();
+
+ label = begin_current_label_crit_section();
+ if (!unconfined(label)) {
+ error = fn_for_each(label, profile,
+ aa_profile_ns_perm(profile, &ad,
+ AA_USERNS_CREATE));
+ }
+ end_current_label_crit_section(label);
+
+ return error;
+}
+
/**
* apparmor_sk_alloc_security - allocate and attach the sk_security field
*/
LSM_HOOK_INIT(task_getsecid_obj, apparmor_task_getsecid_obj),
LSM_HOOK_INIT(task_setrlimit, apparmor_task_setrlimit),
LSM_HOOK_INIT(task_kill, apparmor_task_kill),
+ LSM_HOOK_INIT(userns_create, apparmor_userns_create),
#ifdef CONFIG_AUDIT
LSM_HOOK_INIT(audit_rule_init, aa_audit_rule_init),
}
static struct ctl_table apparmor_sysctl_table[] = {
+#ifdef CONFIG_USER_NS
{
.procname = "unprivileged_userns_apparmor_policy",
.data = &unprivileged_userns_apparmor_policy,
.mode = 0600,
.proc_handler = apparmor_dointvec,
},
+#endif /* CONFIG_USER_NS */
{
.procname = "apparmor_display_secid_mode",
.data = &apparmor_display_secid_mode,
.mode = 0600,
.proc_handler = apparmor_dointvec,
},
-
{ }
};
profile_tracee_perm(tracee_cred, profile, tracer,
xrequest, &sa));
}
+
+/* call back to audit ptrace fields */
+static void audit_ns_cb(struct audit_buffer *ab, void *va)
+{
+ struct apparmor_audit_data *ad = aad_of_va(va);
+
+ if (ad->request & AA_USERNS_CREATE)
+ audit_log_format(ab, " requested=\"userns_create\"");
+
+ if (ad->denied & AA_USERNS_CREATE)
+ audit_log_format(ab, " denied=\"userns_create\"");
+}
+
+int aa_profile_ns_perm(struct aa_profile *profile,
+ struct apparmor_audit_data *ad,
+ u32 request)
+{
+ struct aa_perms perms = { };
+ int error = 0;
+
+ ad->subj_label = &profile->label;
+ ad->request = request;
+
+ if (!profile_unconfined(profile)) {
+ struct aa_ruleset *rules = list_first_entry(&profile->rules,
+ typeof(*rules),
+ list);
+ aa_state_t state;
+
+ state = RULE_MEDIATES(rules, ad->class);
+ if (!state)
+ /* TODO: add flag to complain about unmediated */
+ return 0;
+ perms = *aa_lookup_perms(rules->policy, state);
+ aa_apply_modes_to_perms(profile, &perms);
+ error = aa_check_perms(profile, &perms, request, ad,
+ audit_ns_cb);
+ }
+
+ return error;
+}