diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 4e5297593963..059345c7d119 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -254,8 +254,10 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
 	/* Name */
 	error = -EINVAL;
 	len = qword_get(&buf, buf1, PAGE_SIZE);
-	if (len < 0 || len >= IDMAP_NAMESZ)
+	if (len < 0 || len >= IDMAP_NAMESZ) {
+		cache_put(&res->h, cd);
 		goto out;
+	}
 	if (len == 0)
 		set_bit(CACHE_NEGATIVE, &ent.h.flags);
 	else