# GSD-2022-1006497: btrfs: fix hang during unmount when stopping a space reclaim worker

> A flaw in the Linux kernel btrfs filesystem can cause a system hang during unmount, leading to denial of service.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Oct 2022

## What is GSD-2022-1006497?

GSD-2022-1006497 is a denial of service vulnerability in Kernel, published on 9 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

btrfs: fix hang during unmount when stopping a space reclaim worker

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 v6.0 by commit a362bb864b8db4861977d00bd2c3222503ccc34b, it was introduced in version v4.20 by commit d6fd0ae25c6495674dc5a41a8d16bc8e0073276d. For more details please see the references link.

## Which versions are affected by GSD-2022-1006497?

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-2022-1006497?

No fix has been published for GSD-2022-1006497 yet. Limit exposure of the affected software until one is available.

## Is GSD-2022-1006497 being exploited?

There is no known exploitation of GSD-2022-1006497 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2022-1006497 and fix it if it is affected.

What it is: GSD-2022-1006497 is a denial of service vulnerability in Kernel, published on 9 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of GSD-2022-1006497 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-2022-1006497/ (Markdown: https://insights.sbomify.com/GSD-2022-1006497/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2022-1006497

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From sbomify Insights: https://insights.sbomify.com/GSD-2022-1006497/
Summaries are generated and may contain mistakes; the official description above is the record.