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Commit 53c9269b (vfs_ceph_new: use low-level APIs for symlink/readlink) introduced readlinkat using libcephfs low-level APIs. However, it does not handle properly the case where readlinkat operates on empty name string (see man readlinkat(2)), such as: fd = openat(dirfd, symname, O_PATH | O_NOFOLLOW, 0); readlinkat(fd, "", buf, bufsiz); Handle this special case of readlinkat with empty name string by using a reference to the symlink inode itself. BUG: https://bugzilla.samba.org/show_bug.cgi?id=15686 Signed-off-by: Shachar Sharon <ssharon@redhat.com> Reviewed-by: Anoop C S <anoopcs@samba.org> Reviewed-by: Guenther Deschner <gd@samba.org> Autobuild-User(master): Anoop C S <anoopcs@samba.org> Autobuild-Date(master): Fri Aug 30 10:42:27 UTC 2024 on atb-devel-224 (cherry picked from commit 22182f90e8e7876a9895f77e736d2b96b18b174f) Autobuild-User(v4-21-test): Jule Anger <janger@samba.org> Autobuild-Date(v4-21-test): Mon Sep 2 10:01:41 UTC 2024 on atb-devel-224