Ripple current in synchronous buck converter
Ideally the current through the inductor would not be able to change instantaneously as it does in your trace so something is not quite right.

One thought is that the common mode rejection of the differential probe is not very good so what you are seeing is some of the switching node signal mixed with the current sense voltage. 

One test is to connect both ends of the probe together but leave them connected to the resistor - this way there will be the same common mode but no differential signal, you should get no signal, if you do it is a limitation of the probe.

Which end of the inductor do you have sense resistor? At the DC output end there shouldn't be much AC voltage.

What does the 100ms at the bottom indicate?  Is that the sweep rate? I would have expected one cycle to be in the microsecond region, not 100ms! What frequency are you running at?

One ohm is a bit large for a current sense resistor - you are losing a couple of volts p-p across that resistor. Ideally it would be lower but your signal would then be lower as well.

Here are some instructions for simple AC current probe that would be much better than a resistor.