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evo-syzkaller-ppdev-syzlang

evo-syzkaller-ppdev-syzlang is a skill for Claude Code, Codex from OpenLAIR/OpenSkill. It costs 70 tokens per session (818 once invoked), scanned A, original, Apache-2.0.

A generator for syzlang descriptions of the Linux ppdev parallel-port driver. Syzlang is the description language used by syzkaller, a tool that tests operating-system interfaces with generated inputs.

In plain words
What is it for?
It is for creating syzkaller input descriptions for testing the Linux parallel-port driver on amd64 and 386 systems.
Why use it?
It removes the need to manually list the driver’s ioctl commands, data structures, flags, and architecture-specific values. This helps avoid mismatches between 32-bit and 64-bit systems.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 90repo +2 2d ago A scan 70 tokens original Apache-2.0

Good fit It is for creating syzkaller input descriptions for testing the Linux parallel-port driver on amd64 and 386 systems.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/openlair/openskill/evo-syzkaller-ppdev-syzlang
View source ↗ OpenLAIR/OpenSkill openlair.github.io
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add OpenLAIR/OpenSkill --skill evo-syzkaller-ppdev-syzlang
Clone the repo
git clone --depth 1 https://github.com/OpenLAIR/OpenSkill

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for evo-syzkaller-ppdev-syzlang

README.md
[![agentmods](https://agentmods.dev/badge/skills/openlair/openskill/evo-syzkaller-ppdev-syzlang/github.svg)](https://agentmods.dev/skills/openlair/openskill/evo-syzkaller-ppdev-syzlang)
Your own site
<a href="https://agentmods.dev/skills/openlair/openskill/evo-syzkaller-ppdev-syzlang"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-syzkaller-ppdev-syzlang/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for evo-syzkaller-ppdev-syzlang

Your own site · 80×15
<a href="https://agentmods.dev/skills/openlair/openskill/evo-syzkaller-ppdev-syzlang"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-syzkaller-ppdev-syzlang.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 818 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00070 $0.00818
Opus 5 $0.00035 $0.00409
Sonnet 5 $0.00014 $0.00164
Haiku 4.5 $0.00007 $0.00082

Measured yesterday against content hash 9d3dd47a2d59, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

evo-syzkaller-ppdev-syzlang scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/generate.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

tasks-evolved/syzkaller-ppdev-syzlang/environment/skills/evo-syzkaller-ppdev-syzlang/SKILL.md · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

evo-syzkaller-ppdev-syzlang

Generates complete syzkaller syzlang device driver descriptions for the Linux ppdev (parallel port) subsystem.

Overview

Produces two files:

  • dev_ppdev.txt — syzlang descriptions with includes, resource, opener, all 28 ioctl variants, struct, and flag groups
  • dev_ppdev.txt.const — architecture-specific constant values for amd64 and 386

Key Domain Knowledge

IOCTL Encoding (x86)

  • ppdev uses magic type char 'p' (0x70) for all ioctls
  • _IO: dir=0, size=0
  • _IOR: dir=2 (bit 31), size encoded in bits 16-29
  • _IOW: dir=1 (bit 30), size encoded in bits 16-29
  • Formula: (dir << 30) | (size << 16) | (type << 8) | nr

Architecture Differences

  • struct timeval is 16 bytes on amd64 (two 8-byte longs) but 8 bytes on 386 (two 4-byte longs)
  • This causes PPGETTIME and PPSETTIME to have different ioctl numbers per architecture
  • All other ioctls have identical values across amd64 and 386

Complete IOCTL Coverage (28 total)

  • 4 _IO (no-arg): PPCLAIM, PPRELEASE, PPYIELD, PPEXCL
  • 14 _IOW (input): PPSETMODE, PPWSTATUS(obsolete), PPWCONTROL, PPWDATA, PPWECONTROL(obsolete), PPWFIFO(obsolete), PPFCONTROL, PPDATADIR, PPNEGOT, PPWCTLONIRQ, PPSETPHASE, PPSETTIME, PPSETFLAGS
  • 10 _IOR (output): PPRSTATUS, PPRCONTROL, PPRDATA, PPRECONTROL(obsolete), PPRFIFO(obsolete), PPCLRIRQ, PPGETTIME, PPGETMODES, PPGETMODE, PPGETPHASE, PPGETFLAGS

Syzlang Direction Mapping

  • _IOR (kernel writes to user) → ptr[out, ...]
  • _IOW (user writes to kernel) → ptr[in, ...]
  • _IO (no data) → omit third argument entirely

Flag Groups

  • ieee1284_modes: 12 IEEE 1284 protocol mode constants from linux/parport.h
  • ppdev_flags: PP_FASTWRITE, PP_FASTREAD, PP_W91284PIC from linux/ppdev.h

Const File Format

  • Header: # Code generated by syz-sysgen. DO NOT EDIT.
  • Architecture line: arches = 386, amd64
  • Per-constant: NAME = 386:value, amd64:value (arch-qualified format)
  • Values are decimal integers
  • Constants must be sorted alphabetically (syzkaller convention)

Read the full file on GitHub · 63 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 63 lines · 70 tokens per session scan A 9d3dd47a2d59

Subscribe to this mod's changes

evo-syzkaller-ppdev-syzlang is a skill published in the GitHub repository OpenLAIR/OpenSkill (90 stars, last pushed 2d ago), licensed Apache-2.0. It adds 70 tokens to every session and 818 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-11.

Hardware and IoTTestingagent-skillsai-agentsllm-agentsopen worldself-evolving-agents
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