DMX PUNISHED FOR SNEAKING DRUGS INTO PRISON

DMX  just scored an extended stay  in his Arizona prison after the rapper was allegedly caught with drugs behind bars ... but that's just the tip of the iceberg.

Law enforcement sources tell TMZ, DMX broke SEVERAL rules in Yuma state prison since January -- including drug possession, failing or refusing a drug test, smoking when he wasn't supposed to, being disrespectful, disruptive, and disorderly ... the list goes on.