Deed shall thereupon be executed by such sheriff, which shall vest in the purchaser the same estate that would have vested in the mortgagee if the equity of redemption had been foreclosed, and no other or greater; and such deeds shall be as valid as if executed by the mortgagor and mortgagee, and shall be an entire bar against each of them and all parties to the suit in which the decree for such sale was made, and against their heirs respectively, and all persons claiming under such heirs.