/*
* apparmor_process_label_set: Set AppArmor process profile
*
* @label : the profile to set
* @default : use the default profile if label is NULL
* @on_exec : this is ignored. Apparmor profile will be changed immediately
*
* Returns 0 on success, < 0 on failure
*
* Notes: This relies on /proc being available.
*/
static int apparmor_process_label_set(const char *label, int use_default,
int on_exec)
{
if (!aa_enabled)
return 0;
/* user may request that we just ignore apparmor */
if (label && strcmp(label, AA_UNCHANGED) == 0) {
INFO("apparmor profile unchanged per user request");
return 0;
}
/*
* If we are already confined and no profile was requested,
* then default to unchanged
*/
if (in_aa_confined_container() && !aa_stacking_supported()) {
if (label) {
ERROR("already apparmor confined, but new label requested.");
return -1;
}
return 0;
}
if (!label) {
if (use_default)
label = AA_DEF_PROFILE;
else
return 0;
}
if (strcmp(label, "unconfined") == 0 && apparmor_am_unconfined()) {
INFO("apparmor profile unchanged");
return 0;
}
if (aa_change_profile(label) < 0) {
SYSERROR("failed to change apparmor profile to %s", label);
return -1;
}
INFO("changed apparmor profile to %s", label);
return 0;
}
/*
* apparmor_process_label_set: Set AppArmor process profile
*
* @label : the profile to set
* @conf : the container configuration to use @label is NULL
* @default : use the default profile if label is NULL
* @on_exec : this is ignored. Apparmor profile will be changed immediately
*
* Returns 0 on success, < 0 on failure
*
* Notes: This relies on /proc being available.
*/
static int apparmor_process_label_set(const char *inlabel, struct lxc_conf *conf,
int use_default, int on_exec)
{
const char *label = inlabel ? inlabel : conf->lsm_aa_profile;
char *curlabel;
if (!aa_enabled)
return 0;
/* user may request that we just ignore apparmor */
if (label && strcmp(label, AA_UNCHANGED) == 0) {
INFO("apparmor profile unchanged per user request");
return 0;
}
curlabel = apparmor_process_label_get(getpid());
if (!aa_stacking_supported() && aa_needs_transition(curlabel)) {
// we're already confined, and stacking isn't supported
if (!label || strcmp(curlabel, label) == 0) {
// no change requested
free(curlabel);
return 0;
}
ERROR("already apparmor confined, but new label requested.");
free(curlabel);
return -1;
}
free(curlabel);
if (!label) {
if (use_default) {
if (cgns_supported())
label = AA_DEF_PROFILE_CGNS;
else
label = AA_DEF_PROFILE;
}
else
label = "unconfined";
}
if (!check_mount_feature_enabled() && strcmp(label, "unconfined") != 0) {
WARN("Incomplete AppArmor support in your kernel");
if (!conf->lsm_aa_allow_incomplete) {
ERROR("If you really want to start this container, set");
ERROR("lxc.aa_allow_incomplete = 1");
ERROR("in your container configuration file");
return -1;
}
}
if (strcmp(label, "unconfined") == 0 && apparmor_am_unconfined()) {
INFO("apparmor profile unchanged");
return 0;
}
if (aa_change_profile(label) < 0) {
SYSERROR("failed to change apparmor profile to %s", label);
return -1;
}
INFO("changed apparmor profile to %s", label);
return 0;
}
