Abu Ahmad al-Hakim: Not considered reliable by them
Abu Bakr ibn Abi Dawud: Weak
Abu Hatim ibn Hibban al-Busti: May have erred
Ibn Hajar al-Asqalani: Truthful, but makes mistakes, and once said: Al-Bukhari narrated two hadiths from him, and did not consider him reliable
Al-Dhahabi: Truthful