  It is often argued that quantum gravitational correction to the Heisenberg's
uncertainty principle leads to, among other things, a black hole remnant with
finite temperature. However, such a generalized uncertainty principle also
seemingly removes the Chandrasekhar limit, i.e., it permits white dwarfs to be
arbitrarily large, which is at odds with astrophysical observations. We show
that this problem can be resolved if the parameter in the generalized
uncertainty principle is negative. We also discuss the Planck scale physics of
such a model.
