linux-cve-announce - CVE-2022-49742: f2fs: initialize locks earlier in f2fs_fill

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Message-ID: <2025032757-CVE-2022-49742-e3d5@gregkh>
Date: Thu, 27 Mar 2025 17:43:00 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49742: f2fs: initialize locks earlier in f2fs_fill_super()

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

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

f2fs: initialize locks earlier in f2fs_fill_super()

syzbot is reporting lockdep warning at f2fs_handle_error() [1], for
spin_lock(&sbi->error_lock) is called before spin_lock_init() is called.
For safe locking in error handling, move initialization of locks (and
obvious structures) in f2fs_fill_super() to immediately after memory
allocation.

The Linux kernel CVE team has assigned CVE-2022-49742 to this issue.


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

	Fixed in 6.1.11 with commit ddeff03bb33810fcf2f0c18e03d099cf0aacda62
	Fixed in 6.2 with commit 92b4cf5b48955a4bdd15fe4e2067db8ebd87f04c

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-2022-49742
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/f2fs/super.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/ddeff03bb33810fcf2f0c18e03d099cf0aacda62
	https://git.kernel.org/stable/c/92b4cf5b48955a4bdd15fe4e2067db8ebd87f04c