linux-cve-announce - CVE-2025-37950: ocfs2: fix panic in failed foilio allocation

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Message-ID: <2025052000-CVE-2025-37950-2a1f@gregkh>
Date: Tue, 20 May 2025 18:02:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37950: ocfs2: fix panic in failed foilio allocation

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

ocfs2: fix panic in failed foilio allocation

commit 7e119cff9d0a ("ocfs2: convert w_pages to w_folios") and commit
9a5e08652dc4b ("ocfs2: use an array of folios instead of an array of
pages") save -ENOMEM in the folio array upon allocation failure and call
the folio array free code.

The folio array free code expects either valid folio pointers or NULL. 
Finding the -ENOMEM will result in a panic.  Fix by NULLing the error
folio entry.

The Linux kernel CVE team has assigned CVE-2025-37950 to this issue.


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

	Issue introduced in 6.14 with commit 7e119cff9d0a21e39e53c7d27addc31f4b8c0000 and fixed in 6.14.7 with commit 80d18f060d5bdf2c5eb3d1d00dcb744d6a879222
	Issue introduced in 6.14 with commit 7e119cff9d0a21e39e53c7d27addc31f4b8c0000 and fixed in 6.15-rc6 with commit 31d4cd4eb2f8d9b87ebfa6a5e443a59e3b3d7b8c

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-2025-37950
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/ocfs2/alloc.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/80d18f060d5bdf2c5eb3d1d00dcb744d6a879222
	https://git.kernel.org/stable/c/31d4cd4eb2f8d9b87ebfa6a5e443a59e3b3d7b8c