Health & Saf. Code, § 32508

No suit, action, or proceeding shall be commenced or maintained by any person to set aside, annul, or affect the conveyance or the title to the property conveyed, or the right to the possession, rents, issues, and profits thereof, unless it is commenced within two years after the date of filing the grant for record. Nor in any suit, action, or proceeding commenced by the trustee named in the grant, his successor, privy, or any person holding under him shall any defense be made involving the legality of the grant, or affecting the title to the property thereby conveyed, the right to its possession, or the rents, issues, and profits thereof, unless the suit, action, or proceeding is commenced within two years after the grant is filed for record. After such filing the property shall be exempt from execution and forced sale.