userns: Convert hostfs to use kuid and kgid where appropriate

Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

2 files changed, 4 insertions, 6 deletions

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 124146543aa7..6c9f3a9d5e21 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -542,8 +542,8 @@ static int read_name(struct inode *ino, char *name)
         ino->i_ino = st.ino;
         ino->i_mode = st.mode;
         set_nlink(ino, st.nlink);
-        ino->i_uid = st.uid;
-        ino->i_gid = st.gid;
+        i_uid_write(ino, st.uid);
+        i_gid_write(ino, st.gid);
         ino->i_atime = st.atime;
         ino->i_mtime = st.mtime;
         ino->i_ctime = st.ctime;
@@ -808,11 +808,11 @@ int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
         }
         if (attr->ia_valid & ATTR_UID) {
                 attrs.ia_valid |= HOSTFS_ATTR_UID;
-                attrs.ia_uid = attr->ia_uid;
+                attrs.ia_uid = from_kuid(&init_user_ns, attr->ia_uid);
         }
         if (attr->ia_valid & ATTR_GID) {
                 attrs.ia_valid |= HOSTFS_ATTR_GID;
-                attrs.ia_gid = attr->ia_gid;
+                attrs.ia_gid = from_kgid(&init_user_ns, attr->ia_gid);
         }
         if (attr->ia_valid & ATTR_SIZE) {
                 attrs.ia_valid |= HOSTFS_ATTR_SIZE;
diff --git a/init/Kconfig b/init/Kconfig
index 381f765df923..8450442da6cd 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -957,8 +957,6 @@ config UIDGID_CONVERTED
         depends on UFS_FS = n
         depends on XFS_FS = n
 
-        depends on !UML || HOSTFS = n
-
         # The rare drivers that won't build
         depends on ANDROID_BINDER_IPC = n