linux-cve-announce - CVE-2022-49485: drm/v3d: Fix null pointer dereference of pointer perfmon

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025022605-CVE-2022-49485-a8ec@gregkh>
Date: Wed, 26 Feb 2025 03:12:39 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49485: drm/v3d: Fix null pointer dereference of pointer perfmon

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

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

drm/v3d: Fix null pointer dereference of pointer perfmon

In the unlikely event that pointer perfmon is null the WARN_ON return path
occurs after the pointer has already been deferenced. Fix this by only
dereferencing perfmon after it has been null checked.

The Linux kernel CVE team has assigned CVE-2022-49485 to this issue.


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

	Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.15.46 with commit 4be045434923e549a50846a066a04b7b6c1d6d33
	Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.17.14 with commit 1df8f8901babcc8c8eea2c067179e455b5c828fd
	Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.18.3 with commit 3b72deb784a7d4ae8519a5c584cd87c4b57aa6c8
	Issue introduced in 5.15 with commit 26a4dc29b74a137f45665089f6d3d633fcc9b662 and fixed in 5.19 with commit ce7a1ecf3f9f1fccaf67295307614511d8e11b13

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-2022-49485
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:
	drivers/gpu/drm/v3d/v3d_perfmon.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/4be045434923e549a50846a066a04b7b6c1d6d33
	https://git.kernel.org/stable/c/1df8f8901babcc8c8eea2c067179e455b5c828fd
	https://git.kernel.org/stable/c/3b72deb784a7d4ae8519a5c584cd87c4b57aa6c8
	https://git.kernel.org/stable/c/ce7a1ecf3f9f1fccaf67295307614511d8e11b13