userns: Convert the audit loginuid to be a kuid

Always store audit loginuids in type kuid_t.

Print loginuids by converting them into uids in the appropriate user
namespace, and then printing the resulting uid.

Modify audit_get_loginuid to return a kuid_t.

Modify audit_set_loginuid to take a kuid_t.

Modify /proc/<pid>/loginuid on read to convert the loginuid into the
user namespace of the opener of the file.

Modify /proc/<pid>/loginud on write to convert the loginuid
rom the user namespace of the opener of the file.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Paul Moore <paul@paul-moore.com> ?
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

3 files changed, 13 insertions, 13 deletions

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index c5a5165a592..2f475151cea 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2630,12 +2630,12 @@ static void xfrm_policy_fini(struct net *net)
 
         flush_work(&net->xfrm.policy_hash_work);
 #ifdef CONFIG_XFRM_SUB_POLICY
-        audit_info.loginuid = -1;
+        audit_info.loginuid = INVALID_UID;
         audit_info.sessionid = -1;
         audit_info.secid = 0;
         xfrm_policy_flush(net, XFRM_POLICY_TYPE_SUB, &audit_info);
 #endif
-        audit_info.loginuid = -1;
+        audit_info.loginuid = INVALID_UID;
         audit_info.sessionid = -1;
         audit_info.secid = 0;
         xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
@@ -2742,7 +2742,7 @@ static void xfrm_audit_common_policyinfo(struct xfrm_policy *xp,
 }
 
 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
-                           uid_t auid, u32 sessionid, u32 secid)
+                           kuid_t auid, u32 sessionid, u32 secid)
 {
         struct audit_buffer *audit_buf;
 
@@ -2757,7 +2757,7 @@ void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
 EXPORT_SYMBOL_GPL(xfrm_audit_policy_add);
 
 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
-                              uid_t auid, u32 sessionid, u32 secid)
+                              kuid_t auid, u32 sessionid, u32 secid)
 {
         struct audit_buffer *audit_buf;
 
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 5b228f97d4b..fce6a49bc7c 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -2045,7 +2045,7 @@ void xfrm_state_fini(struct net *net)
         unsigned int sz;
 
         flush_work(&net->xfrm.state_hash_work);
-        audit_info.loginuid = -1;
+        audit_info.loginuid = INVALID_UID;
         audit_info.sessionid = -1;
         audit_info.secid = 0;
         xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
@@ -2112,7 +2112,7 @@ static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
 }
 
 void xfrm_audit_state_add(struct xfrm_state *x, int result,
-                          uid_t auid, u32 sessionid, u32 secid)
+                          kuid_t auid, u32 sessionid, u32 secid)
 {
         struct audit_buffer *audit_buf;
 
@@ -2127,7 +2127,7 @@ void xfrm_audit_state_add(struct xfrm_state *x, int result,
 EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
 
 void xfrm_audit_state_delete(struct xfrm_state *x, int result,
-                             uid_t auid, u32 sessionid, u32 secid)
+                             kuid_t auid, u32 sessionid, u32 secid)
 {
         struct audit_buffer *audit_buf;
 
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index e75d8e47f35..9ea55db737b 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -575,7 +575,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
         struct xfrm_state *x;
         int err;
         struct km_event c;
-        uid_t loginuid = audit_get_loginuid(current);
+        kuid_t loginuid = audit_get_loginuid(current);
         u32 sessionid = audit_get_sessionid(current);
         u32 sid;
 
@@ -654,7 +654,7 @@ static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
         int err = -ESRCH;
         struct km_event c;
         struct xfrm_usersa_id *p = nlmsg_data(nlh);
-        uid_t loginuid = audit_get_loginuid(current);
+        kuid_t loginuid = audit_get_loginuid(current);
         u32 sessionid = audit_get_sessionid(current);
         u32 sid;
 
@@ -1369,7 +1369,7 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
         struct km_event c;
         int err;
         int excl;
-        uid_t loginuid = audit_get_loginuid(current);
+        kuid_t loginuid = audit_get_loginuid(current);
         u32 sessionid = audit_get_sessionid(current);
         u32 sid;
 
@@ -1624,7 +1624,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
                                             NETLINK_CB(skb).pid);
                 }
         } else {
-                uid_t loginuid = audit_get_loginuid(current);
+                kuid_t loginuid = audit_get_loginuid(current);
                 u32 sessionid = audit_get_sessionid(current);
                 u32 sid;
 
@@ -1918,7 +1918,7 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
 
         err = 0;
         if (up->hard) {
-                uid_t loginuid = audit_get_loginuid(current);
+                kuid_t loginuid = audit_get_loginuid(current);
                 u32 sessionid = audit_get_sessionid(current);
                 u32 sid;
 
@@ -1961,7 +1961,7 @@ static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
         km_state_expired(x, ue->hard, current->pid);
 
         if (ue->hard) {
-                uid_t loginuid = audit_get_loginuid(current);
+                kuid_t loginuid = audit_get_loginuid(current);
                 u32 sessionid = audit_get_sessionid(current);
                 u32 sid;