# GSD-2022-1006221: powerpc/pci: Fix get_phb_number() locking

> A locking issue in the Linux kernel's powerpc PCI subsystem could lead to a race condition, potentially causing a denial of service.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Not stated
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Sep 2022

## What is GSD-2022-1006221?

GSD-2022-1006221 is a vulnerability in Kernel, published on 17 Sep 2022. 

### Official description

powerpc/pci: Fix get_phb_number() locking

This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
This ID is fixed in Linux Kernel version v4.14.291 by commit 6f75057c21eab12c6ccb7f06f859641a6edfab99, it was introduced in version v4.14.291 by commit a79e4395619c926ea7e828b2023c0fbe2776385b. For more details please see the references link.

## Which versions are affected by GSD-2022-1006221?

1 open source package ship an affected version, including Kernel.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Kernel` | Linux | All versions | None |

## How do I fix GSD-2022-1006221?

No fix has been published for GSD-2022-1006221 yet. Limit exposure of the affected software until one is available.

## Is GSD-2022-1006221 being exploited?

There is no known exploitation of GSD-2022-1006221 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2022-1006221 and fix it if it is affected.

What it is: GSD-2022-1006221 is a vulnerability in Kernel, published on 17 Sep 2022. 
Exploitation: There is no known exploitation of GSD-2022-1006221 in the wild and no public exploit code.

Affected packages and fixed versions:
- Kernel (Linux): affected all versions; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/GSD-2022-1006221/ (Markdown: https://insights.sbomify.com/GSD-2022-1006221/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2022-1006221

---
From sbomify Insights: https://insights.sbomify.com/GSD-2022-1006221/
Summaries are generated and may contain mistakes; the official description above is the record.