integer-overflow SKILL.md skillA
integer-overflow 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/integer-overflow@git:20261016.df7fb32Pins git:20261016.df7fb32 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/integer-overflow/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261016.df7fb32, committed Oct 16, 2026
- First version recorded
- Sep 20, 2026
- Size
- 6,915 bytes
- Repository stars
- 25
- License
- Apache-2.0
Classify integer overflow and unsigned underflow evidence from arithmetic used in sizes or call arguments. Maps to CWE-190.
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
## Integer Overflow Analysis (CWE-190) ### Evidence Pattern An integer-overflow candidate has: - **ARITH_OVERFLOW event**: An arithmetic operation (a + b, a * b) on size-typed values - **Sink context**: The result flows into `malloc`, `calloc`, `realloc`, `memcpy`, `memset` - **No overflow check**: No guard checking `a > SIZE_MAX - b` before the operation - **Unsigned subtraction**: `a - b` uses unsigned operands, is passed to a function, and no `b <= a` invariant/guard proves the subtraction cannot underflow The `category` field encodes the confidence tier the pipeline already computed: | Category | Pattern | Static verdict | |----------|---------|----------------| | `size_calc_overflow` | `malloc(n * m)` / `malloc(n * sizeof(T))` / `calloc(n, m)` | suspected | | `size_mul_const_overflow` | `malloc(n * K)`, n is a function parameter and `K >= 256` | suspected | | `unsigned_sub_underflow` | unsigned `total - consumed` passed to an ordinary call | suspected | | `integer_overflow` | wraparound inside a bounds check | possible | Evidence file fragments: - **integer_overflow**: the site, with a category-shaped description (size calculation / unsigned subtraction underflow) …
Read the whole file at its exact version.
How to install
mdr add dannyan/secguard-clang/integer-overflow@sha256:983e1e141a12c883The line at the top of this page pins the label git:20261016.df7fb32, 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_j7dlzvgfubtvfjmj)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 20, 2026 and Oct 16, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.df7fb32 latest | 2026-10-16 | df7fb32 | 6,915 B | A | view · diff |
| git:20261016.97127fc | 2026-10-16 | 97127fc | 6,618 B | A | view · diff |
| git:20261012.0c727d3 | 2026-10-12 | 0c727d3 | 6,561 B | A | view · diff |
| git:20260924.45f72bd | 2026-09-24 | 45f72bd | 5,040 B | A | view · diff |
| git:20260920.c098895 | 2026-09-20 | c098895 | 4,099 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 (6915 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_j7dlzvgfubtvfjmj GET https://markdownregistry.com/api/v1/resolve?ref=dannyan/secguard-clang/integer-overflow GET https://markdownregistry.com/api/v1/blob/983e1e141a12c883b55431a7e01989504ffed8d9d184a5b3add5f429adbcb205
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.