binutils -- excessive debug section size can cause excessive memory consumption in bfd's dwarf2.c read_section()

Hao Wang reports:

    There's a flaw in the BFD library of binutils in versions before 2.36.
    An attacker who supplies a crafted file to an application linked with BFD,
    and using the DWARF functionality, could cause an impact to system
    availability by way of excessive memory consumption.