  We report measurements of the low-temperature specific heat of Al-flux-grown
samples of SmB$_6$ in magnetic fields up to 32 T. Quantum oscillations periodic
in $1/H$ are observed between 8 and 32 T at selected angles between [001] and
[111]. The observed frequencies and their angular dependence are consistent
with previous magnetic torque measurements of SmB$_6$ but the effective masses
inferred from Lifshitz-Kosevich theory are significantly larger and closer to
those inferred from zero-field specific heat. Our results are thus consistent
with a bulk density of states origin for the oscillations.
