Donors of excess food are protected from liability by both federal and state laws.

Federal Law
Bill Emerson Good Samaritan Food Donation Act of 1996 (42 USC § 1791)
(c) Liability for damages from donated food and grocery products.
(1) Liability of a person or gleaner.
A person or gleaner shall not be subject to civil or criminal liability arising from the nature, age, packaging, or condition of apparently wholesome food or an apparently fit grocery product that is donated in good faith to a nonprofit organization for ultimate distribution to individuals in need.

State Law
Hawaiʻi Good Samaritan Donation of Food Act (HRS 145D §-1, §-2, §-3, §-4, §-5)
[§145D-2] Exceptions to liability.
(a) Any donor of food products who donates in good faith for use or distribution by a charitable, religious, or nonprofit organization to those in need shall not be liable for any civil damages or criminal penalties for injuries or illnesses, including those resulting from the nature, age, condition, packaging, or handling of donated food products, except in cases of negligence or wanton acts or omissions by the donor.