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>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index c147e7024f11..f64d092f2bed 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1426,7 +1426,7 @@ struct task_struct {
 
         struct audit_context *audit_context;
 #ifdef CONFIG_AUDITSYSCALL
-        uid_t loginuid;
+        kuid_t loginuid;
         unsigned int sessionid;
 #endif
         struct seccomp seccomp;