linux-cve-announce - CVE-2021-47660: fs/ntfs3: Fix some memory leaks in an error handling path of 'log

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Message-ID: <2025022652-CVE-2021-47660-af30@gregkh>
Date: Wed, 26 Feb 2025 03:04:54 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2021-47660: fs/ntfs3: Fix some memory leaks in an error handling path of 'log_replay()'

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

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

fs/ntfs3: Fix some memory leaks in an error handling path of 'log_replay()'

All error handling paths lead to 'out' where many resources are freed.

Do it as well here instead of a direct return, otherwise 'log', 'ra' and
'log->one_page_buf' (at least) will leak.

The Linux kernel CVE team has assigned CVE-2021-47660 to this issue.


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

	Issue introduced in 5.15 with commit b46acd6a6a627d876898e1c84d3f84902264b445 and fixed in 5.15.46 with commit d8be98ab88250dc12a98efdb703792a537b0eac3
	Issue introduced in 5.15 with commit b46acd6a6a627d876898e1c84d3f84902264b445 and fixed in 5.17.14 with commit bc4a1d384a04c6dba9312e1421a9f9f7c03339a4
	Issue introduced in 5.15 with commit b46acd6a6a627d876898e1c84d3f84902264b445 and fixed in 5.18.3 with commit 2c97519ed6b4239594c58ddacf3d0d576cf070cc
	Issue introduced in 5.15 with commit b46acd6a6a627d876898e1c84d3f84902264b445 and fixed in 5.19 with commit e589f9b7078e1c0191613cd736f598e81d2390de

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-2021-47660
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/ntfs3/fslog.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/d8be98ab88250dc12a98efdb703792a537b0eac3
	https://git.kernel.org/stable/c/bc4a1d384a04c6dba9312e1421a9f9f7c03339a4
	https://git.kernel.org/stable/c/2c97519ed6b4239594c58ddacf3d0d576cf070cc
	https://git.kernel.org/stable/c/e589f9b7078e1c0191613cd736f598e81d2390de