nfsd/idmap: return nfserr_inval for 0-length names
Tigran Mkrtchyan's new pynfs testcases for zero length principals fail:
SATT16 st_setattr.testEmptyPrincipal : FAILURE
Setting empty owner should return NFS4ERR_INVAL,
instead got NFS4ERR_BADOWNER
SATT17 st_setattr.testEmptyGroupPrincipal : FAILURE
Setting empty owner_group should return NFS4ERR_INVAL,
instead got NFS4ERR_BADOWNER
This patch checks the principal and returns nfserr_inval directly. It
could check after decoding in nfs4xdr.c, but it's simpler to do it in
nfsd_map_xxxx.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 5b20577..6b9b6cc 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -628,6 +628,10 @@ nfsd_map_name_to_uid(struct svc_rqst *rqstp, const char *name, size_t namelen,
{
__be32 status;
u32 id = -1;
+
+ if (name == NULL || namelen == 0)
+ return nfserr_inval;
+
status = do_name_to_id(rqstp, IDMAP_TYPE_USER, name, namelen, &id);
*uid = make_kuid(&init_user_ns, id);
if (!uid_valid(*uid))
@@ -641,6 +645,10 @@ nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen,
{
__be32 status;
u32 id = -1;
+
+ if (name == NULL || namelen == 0)
+ return nfserr_inval;
+
status = do_name_to_id(rqstp, IDMAP_TYPE_GROUP, name, namelen, &id);
*gid = make_kgid(&init_user_ns, id);
if (!gid_valid(*gid))