userns: Convert stat to return values mapped from kuids and kgids

- Store uids and gids with kuid_t and kgid_t in struct kstat
- Convert uid and gids to userspace usable values with
  from_kuid and from_kgid

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index aec2202a596c..d5c820a54590 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -71,8 +71,8 @@ static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
 {
         typeof(ubuf->st_uid) uid = 0;
         typeof(ubuf->st_gid) gid = 0;
-        SET_UID(uid, stat->uid);
-        SET_GID(gid, stat->gid);
+        SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
+        SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
         if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
             __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
             __put_user(stat->ino, &ubuf->__st_ino) ||