Datasets:

Akirayasha
/

cisb-O2

language:
  - en
license: mit
task_categories:
  - text-generation
tags:
  - assembly
  - security
  - compiler-bugs
  - CISB
  - program-repair
size_categories:
  - n<1K

CISB-O2: Compiler-Introduced Security Bugs at -O2

Overview

This dataset collects the unsafe half of the Compiler-Introduced Security Bugs (CISB) benchmark: each record is a CISB case compiled with LLVM/Clang-17 at -O2, where the optimizer eliminated or bypassed a security check that is still present in the -O0 build.

Because the -O0 build is the safe variant and the -O2 build is the unsafe one, every record here is unsafe by construction -- there is no flag column. The intended task is repair: given the unsafe -O2 assembly and the verifier's failure output, produce a corrected assembly that restores the security property without changing other behavior.

Dataset Structure

Column	Description
`task_name`	Task identifier, e.g. `b-4-var-0`
`source_code`	Original C source (`code.c`)
`x86_64`	x86-64 assembly at -O2 (Intel syntax, built with `-masm=intel`)
`aarch64_linux`	AArch64 assembly at -O2
`riscv`	RISC-V RV64 (`rv64gc`/`lp64d`) assembly at -O2
`run_output`	Combined stdout+stderr of the verifier harness (`test.c`) run against the x86-64 build
`test_c`	C source of the verifier harness (`test.c`) -- links against the assembly under test and reports its verdict via exit code

Statistics

Total records: 36
Bug families: 6 (b-4, b-9, b-12, b-14, b-21, l-30), 6 variants each

Security Oracle

The test.c harness reports its verdict through the process exit code:

0 -> SAFE (security check preserved)
1 -> UNSAFE (security check eliminated) -- the expected state for every record here
2 -> HARNESS_ERROR
killed by signal -> CRASH; no exit in time -> TIMEOUT

The run_output column captures what that harness printed while returning UNSAFE, so it can be fed to a model as the failure description for a repair task.

Usage

from datasets import load_dataset

ds = load_dataset("Akirayasha/cisb-O2", split="test")

record = ds[0]
unsafe_asm = record["x86_64"]      # assembly to repair
failure     = record["run_output"] # why the verifier says it is unsafe
harness     = record["test_c"]     # verifier source, to rebuild/rerun it against a candidate

Citation

Part of the CISC-to-RISC transpilation research project at MBZUAI.