linux-cve-announce - CVE-2025-22114: btrfs: don't clobber ret in btrfs_validate

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Message-ID: <2025041625-CVE-2025-22114-721d@gregkh>
Date: Wed, 16 Apr 2025 16:13:25 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22114: btrfs: don't clobber ret in btrfs_validate_super()

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

btrfs: don't clobber ret in btrfs_validate_super()

Commit 2a9bb78cfd36 ("btrfs: validate system chunk array at
btrfs_validate_super()") introduces a call to validate_sys_chunk_array()
in btrfs_validate_super(), which clobbers the value of ret set earlier.
This has the effect of negating the validity checks done earlier, making
it so btrfs could potentially try to mount invalid filesystems.

The Linux kernel CVE team has assigned CVE-2025-22114 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.14 with commit 2a9bb78cfd367fdeff74f15b1e98969912292d9e and fixed in 6.14.2 with commit ef6800a2015e706e9852a5ec15263fec9990d012
	Issue introduced in 6.14 with commit 2a9bb78cfd367fdeff74f15b1e98969912292d9e and fixed in 6.15-rc1 with commit 9db9c7dd5b4e1d3205137a094805980082c37716

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-22114
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	fs/btrfs/disk-io.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/ef6800a2015e706e9852a5ec15263fec9990d012
	https://git.kernel.org/stable/c/9db9c7dd5b4e1d3205137a094805980082c37716