riscv_dis_print_insn_buf

Fix: stack-based buffer overflow caused by riscv_insn_length change

• Status: Merged for Binutils 2.40 / GDB 13
• Branch: riscv-dis-print-insn-buf
• Tracking PR: None
• Mailing List:
  • PATCH v1 (2022-10-05)
  • PATCH v2 (2022-10-05)
  • PATCH v3 (2022-10-05)

Issue Fixed

Because commit bb996692bd9 "RISC-V/gas: allow generating up to 176-bit instructions with .insn" changed riscv_insn_length, it broke a part of both opcodes and GDB.

This patchset provides short-term solution to prevent stack-based buffer overflow.