Tenn. Code Ann. § 66-8-112: Rent during redemption period

The debtor, permitted by the purchaser to remain in possession, shall not be liable for rent from the date of the sale to the time of the redemption; and if the purchaser or the purchaser's assignee takes possession under the purchase, upon redemption by the debtor, the debtor shall have a credit for the fair rent of the premises during the time they were in the purchaser's possession.