1 files changed, 26 insertions, 12 deletions

diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index a1f10c0a6255..0ce12346df9c 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -65,7 +65,7 @@ MODULE_PARM_DESC(nfs4_disable_idmapping,
 struct ent {
         struct cache_head h;
         int               type;                /* User / Group */
-        uid_t             id;
+        u32               id;
         char              name[IDMAP_NAMESZ];
         char              authname[IDMAP_NAMESZ];
 };
@@ -540,7 +540,7 @@ rqst_authname(struct svc_rqst *rqstp)
 
 static __be32
 idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen,
-                uid_t *id)
+                u32 *id)
 {
         struct ent *item, key = {
                 .type = type,
@@ -564,7 +564,7 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
 }
 
 static int
-idmap_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
+idmap_id_to_name(struct svc_rqst *rqstp, int type, u32 id, char *name)
 {
         struct ent *item, key = {
                 .id = id,
@@ -587,7 +587,7 @@ idmap_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
 }
 
 static bool
-numeric_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, uid_t *id)
+numeric_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, u32 *id)
 {
         int ret;
         char buf[11];
@@ -603,7 +603,7 @@ numeric_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namel
 }
 
 static __be32
-do_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, uid_t *id)
+do_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, u32 *id)
 {
         if (nfs4_disable_idmapping && rqstp->rq_cred.cr_flavor < RPC_AUTH_GSS)
                 if (numeric_name_to_id(rqstp, type, name, namelen, id))
@@ -616,7 +616,7 @@ do_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, u
 }
 
 static int
-do_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
+do_id_to_name(struct svc_rqst *rqstp, int type, u32 id, char *name)
 {
         if (nfs4_disable_idmapping && rqstp->rq_cred.cr_flavor < RPC_AUTH_GSS)
                 return sprintf(name, "%u", id);
@@ -625,26 +625,40 @@ do_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
 
 __be32
 nfsd_map_name_to_uid(struct svc_rqst *rqstp, const char *name, size_t namelen,
-                __u32 *id)
+                kuid_t *uid)
 {
-        return do_name_to_id(rqstp, IDMAP_TYPE_USER, name, namelen, id);
+        __be32 status;
+        u32 id = -1;
+        status = do_name_to_id(rqstp, IDMAP_TYPE_USER, name, namelen, &id);
+        *uid = make_kuid(&init_user_ns, id);
+        if (!uid_valid(*uid))
+                status = nfserr_badowner;
+        return status;
 }
 
 __be32
 nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen,
-                __u32 *id)
+                kgid_t *gid)
 {
-        return do_name_to_id(rqstp, IDMAP_TYPE_GROUP, name, namelen, id);
+        __be32 status;
+        u32 id = -1;
+        status = do_name_to_id(rqstp, IDMAP_TYPE_GROUP, name, namelen, &id);
+        *gid = make_kgid(&init_user_ns, id);
+        if (!gid_valid(*gid))
+                status = nfserr_badowner;
+        return status;
 }
 
 int
-nfsd_map_uid_to_name(struct svc_rqst *rqstp, __u32 id, char *name)
+nfsd_map_uid_to_name(struct svc_rqst *rqstp, kuid_t uid, char *name)
 {
+        u32 id = from_kuid(&init_user_ns, uid);
         return do_id_to_name(rqstp, IDMAP_TYPE_USER, id, name);
 }
 
 int
-nfsd_map_gid_to_name(struct svc_rqst *rqstp, __u32 id, char *name)
+nfsd_map_gid_to_name(struct svc_rqst *rqstp, kgid_t gid, char *name)
 {
+        u32 id = from_kgid(&init_user_ns, gid);
         return do_id_to_name(rqstp, IDMAP_TYPE_GROUP, id, name);
 }