Ceph » CephFS

Due to this problematic code in src/tools/cephfs_mirror/PeerReplayer.cc:

char *target = (char *)alloca(stx.stx_size+1);
r = ceph_readlink(m_local_mount, local_path.c_str(), target, stx.stx_size);
if (r < 0) {
  derr << ": failed to readlink local path=" << local_path << ": " << cpp_strerror(r)
       << dendl;
  return r;
}

r = ceph_symlink(m_remote_mount, target, remote_path.c_str());
if (r < 0 && r != EEXIST) {
  derr << ": failed to symlink remote path=" << remote_path << " to target=" << target
       << ": " << cpp_strerror(r) << dendl;
  return r;
}

`target` is not null-terminated resulting in possible garbage-suffixed target getting created on the remote filesystem.