linux-cve-announce - CVE-2022-49524: media: pci: cx23885: Fix the error handling in cx23885

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Message-ID: <2025022611-CVE-2022-49524-74f0@gregkh>
Date: Wed, 26 Feb 2025 03:13:18 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49524: media: pci: cx23885: Fix the error handling in cx23885_initdev()

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

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

media: pci: cx23885: Fix the error handling in cx23885_initdev()

When the driver fails to call the dma_set_mask(), the driver will get
the following splat:

[   55.853884] BUG: KASAN: use-after-free in __process_removed_driver+0x3c/0x240
[   55.854486] Read of size 8 at addr ffff88810de60408 by task modprobe/590
[   55.856822] Call Trace:
[   55.860327]  __process_removed_driver+0x3c/0x240
[   55.861347]  bus_for_each_dev+0x102/0x160
[   55.861681]  i2c_del_driver+0x2f/0x50

This is because the driver has initialized the i2c related resources
in cx23885_dev_setup() but not released them in error handling, fix this
bug by modifying the error path that jumps after failing to call the
dma_set_mask().

The Linux kernel CVE team has assigned CVE-2022-49524 to this issue.


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

	Fixed in 4.14.283 with commit 6041d1a0365baa729b6adfb6ed5386d9388018db
	Fixed in 4.19.247 with commit 7b9978e1c94e569d65a0e7e719abb9340f5db4a0
	Fixed in 5.4.198 with commit fa636e9ee4442215cd9a2e079cd5a8e1fe0cb8ba
	Fixed in 5.10.121 with commit ca17e7a532d1a55466cc007b3f4d319541a27493
	Fixed in 5.15.46 with commit 98106f100f50c487469903b9cf6d966785fc9cc3
	Fixed in 5.17.14 with commit 86bd6a579c6c60547706cabf299cd2c9feab3332
	Fixed in 5.18.3 with commit 453514a874c78df1e7804e6e3aaa60c8d8deb6a8
	Fixed in 5.19 with commit e8123311cf06d7dae71e8c5fe78e0510d20cd30b

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-2022-49524
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/media/pci/cx23885/cx23885-core.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/6041d1a0365baa729b6adfb6ed5386d9388018db
	https://git.kernel.org/stable/c/7b9978e1c94e569d65a0e7e719abb9340f5db4a0
	https://git.kernel.org/stable/c/fa636e9ee4442215cd9a2e079cd5a8e1fe0cb8ba
	https://git.kernel.org/stable/c/ca17e7a532d1a55466cc007b3f4d319541a27493
	https://git.kernel.org/stable/c/98106f100f50c487469903b9cf6d966785fc9cc3
	https://git.kernel.org/stable/c/86bd6a579c6c60547706cabf299cd2c9feab3332
	https://git.kernel.org/stable/c/453514a874c78df1e7804e6e3aaa60c8d8deb6a8
	https://git.kernel.org/stable/c/e8123311cf06d7dae71e8c5fe78e0510d20cd30b