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Commit fd2a8043 authored by John Johansen's avatar John Johansen
Browse files

apparmor: add ns being viewed as a param to policy_admin_capable() 



Prepare for a tighter pairing of user namespaces and apparmor policy
namespaces, by making the ns to be viewed available.

Signed-off-by: default avatarJohn Johansen <john.johansen@canonical.com>
parent 2bd8dbbf

security/apparmor/include/policy.h

+1 −1
Original line number Diff line number Diff line
@@ -300,7 +300,7 @@ static inline int AUDIT_MODE(struct aa_profile *profile) 
}



bool policy_view_capable(struct aa_ns *ns);

bool policy_admin_capable(void);

bool policy_admin_capable(struct aa_ns *ns);

bool aa_may_manage_policy(int op);



#endif /* __AA_POLICY_H */

security/apparmor/lsm.c

+6 −6
Original line number Diff line number Diff line
@@ -738,7 +738,7 @@ __setup("apparmor=", apparmor_enabled_setup); 
/* set global flag turning off the ability to load policy */

static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp)

{

	if (!policy_admin_capable())

	if (!policy_admin_capable(NULL))

		return -EPERM;

	return param_set_bool(val, kp);

}
@@ -752,7 +752,7 @@ static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp) 


static int param_set_aabool(const char *val, const struct kernel_param *kp)

{

	if (!policy_admin_capable())

	if (!policy_admin_capable(NULL))

		return -EPERM;

	return param_set_bool(val, kp);

}
@@ -766,7 +766,7 @@ static int param_get_aabool(char *buffer, const struct kernel_param *kp) 


static int param_set_aauint(const char *val, const struct kernel_param *kp)

{

	if (!policy_admin_capable())

	if (!policy_admin_capable(NULL))

		return -EPERM;

	return param_set_uint(val, kp);

}
@@ -792,7 +792,7 @@ static int param_get_audit(char *buffer, struct kernel_param *kp) 
static int param_set_audit(const char *val, struct kernel_param *kp)

{

	int i;

	if (!policy_admin_capable())

	if (!policy_admin_capable(NULL))

		return -EPERM;



	if (!apparmor_enabled)
@@ -813,7 +813,7 @@ static int param_set_audit(const char *val, struct kernel_param *kp) 


static int param_get_mode(char *buffer, struct kernel_param *kp)

{

	if (!policy_admin_capable())

	if (!policy_view_capable(NULL))

		return -EPERM;



	if (!apparmor_enabled)
@@ -825,7 +825,7 @@ static int param_get_mode(char *buffer, struct kernel_param *kp) 
static int param_set_mode(const char *val, struct kernel_param *kp)

{

	int i;

	if (!policy_admin_capable())

	if (!policy_admin_capable(NULL))

		return -EPERM;



	if (!apparmor_enabled)

security/apparmor/policy.c

+9 −3
Original line number Diff line number Diff line
@@ -637,9 +637,15 @@ bool policy_view_capable(struct aa_ns *ns) 
	return response;

}



bool policy_admin_capable(void)

bool policy_admin_capable(struct aa_ns *ns)

{

	return policy_view_capable(NULL) && !aa_g_lock_policy;

	struct user_namespace *user_ns = current_user_ns();

	bool capable = ns_capable(user_ns, CAP_MAC_ADMIN);



	AA_DEBUG("cap_mac_admin? %d\n", capable);

	AA_DEBUG("policy locked? %d\n", aa_g_lock_policy);



	return policy_view_capable(ns) && capable && !aa_g_lock_policy;

}



/**
@@ -657,7 +663,7 @@ bool aa_may_manage_policy(int op) 
		return 0;

	}



	if (!policy_admin_capable()) {

	if (!policy_admin_capable(NULL)) {

		audit_policy(__aa_current_profile(), op, GFP_KERNEL, NULL,

			     "not policy admin", -EACCES);

		return 0;