sizeof-misuse SKILL.md skillA
sizeof-misuse from dannyan/secguard-clang is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dannyan/secguard-clang/sizeof-misuse@git:20261017.a78401fPins git:20261017.a78401f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dannyan/secguard-clang
- Path
extension/shared/skills/sizeof-misuse/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261017.a78401f, committed Oct 17, 2026
- First version recorded
- Aug 23, 2026
- Size
- 3,462 bytes
- Repository stars
- 25
- License
- Apache-2.0
Classify sizeof-misuse evidence — sizeof applied to a pointer variable inside a size context. Maps to CWE-467/CWE-468.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## sizeof Misuse Analysis (CWE-467 / CWE-468) ### Evidence Pattern A sizeof-misuse candidate has: - **sizeof_misuse**: A `sizeof(ptr)` where `ptr` is a pointer VARIABLE (not `sizeof(*ptr)`, not `sizeof(T)`) consumed as a size argument to `malloc`/`calloc`/`realloc`/`memset`/`memcpy`/`memmove` - **call_path**: The function is reachable from an entry point ### Hint Tokens (Verdict Basis) | Token | Meaning | Your action | |-------|---------|-------------| | `subject@<name>` | the operand `sizeof` is applied to | the category states whether the result is a pointer width instead of the pointee size | `subject@` plus the detector category is the verdict basis: `sizeof_pointer` on a single-level pointer is machine-confirmed; the ambiguous pointer-to-pointer case stays your judgment. ### Detection Logic 1. Collect pointer variables (declared with `*`), counting pointer levels and the base type 2. Find `sizeof_expression` whose operand is a bare identifier that is a pointer variable 3. Require the sizeof to be consumed by a malloc-family / memset / memcpy-family call …
Read the whole file at its exact version.
How to install
mdr add dannyan/secguard-clang/sizeof-misuse@sha256:eece04e2c4f8e2a7The line at the top of this page pins the label git:20261017.a78401f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_jfluaq5j4qrlw542)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 23, 2026 and Oct 17, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261017.a78401f latest | 2026-10-17 | a78401f | 3,462 B | A | view · diff |
| git:20260914.1ef9fbc | 2026-09-14 | 1ef9fbc | 3,029 B | A | view · diff |
| git:20260913.46c999d | 2026-09-13 | 46c999d | 3,016 B | A | view · diff |
| git:20260913.4c35c60 | 2026-09-13 | 4c35c60 | 2,363 B | A | view · diff |
| git:20260823.b70fc3f | 2026-08-23 | b70fc3f | 2,330 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3462 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
dannyan/secguard-clang · 25 stars · license Apache-2.0 · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jfluaq5j4qrlw542 GET https://markdownregistry.com/api/v1/resolve?ref=dannyan/secguard-clang/sizeof-misuse GET https://markdownregistry.com/api/v1/blob/eece04e2c4f8e2a7181f68f96787cb4f907a8ecec52fe0afe683d8f80f3508e0
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.