linux-cve-announce - CVE-2022-49525: media: cx25821: Fix the warning when removing the module

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Message-ID: <2025022611-CVE-2022-49525-efd9@gregkh>
Date: Wed, 26 Feb 2025 03:13:19 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49525: media: cx25821: Fix the warning when removing the module

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

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

media: cx25821: Fix the warning when removing the module

When removing the module, we will get the following warning:

[   14.746697] remove_proc_entry: removing non-empty directory 'irq/21', leaking at least 'cx25821[1]'
[   14.747449] WARNING: CPU: 4 PID: 368 at fs/proc/generic.c:717 remove_proc_entry+0x389/0x3f0
[   14.751611] RIP: 0010:remove_proc_entry+0x389/0x3f0
[   14.759589] Call Trace:
[   14.759792]  <TASK>
[   14.759975]  unregister_irq_proc+0x14c/0x170
[   14.760340]  irq_free_descs+0x94/0xe0
[   14.760640]  mp_unmap_irq+0xb6/0x100
[   14.760937]  acpi_unregister_gsi_ioapic+0x27/0x40
[   14.761334]  acpi_pci_irq_disable+0x1d3/0x320
[   14.761688]  pci_disable_device+0x1ad/0x380
[   14.762027]  ? _raw_spin_unlock_irqrestore+0x2d/0x60
[   14.762442]  ? cx25821_shutdown+0x20/0x9f0 [cx25821]
[   14.762848]  cx25821_finidev+0x48/0xc0 [cx25821]
[   14.763242]  pci_device_remove+0x92/0x240

Fix this by freeing the irq before call pci_disable_device().

The Linux kernel CVE team has assigned CVE-2022-49525 to this issue.


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

	Fixed in 4.9.318 with commit 4d6295b6d986476232332fffd08575b185f90d81
	Fixed in 4.14.283 with commit 5beb85ff7d005ddb7bf604a4f2dc76f01b84b318
	Fixed in 4.19.247 with commit 258639bc55a586ee6df92d89786ccf1c71546d70
	Fixed in 5.4.198 with commit 222292930c8ecc3516e03ec1f9fa8448be7ff496
	Fixed in 5.10.121 with commit 3f94169affa33c9db4a439d88f09cb2ed3a33332
	Fixed in 5.15.46 with commit 1f0fc1dfb5fdd456657519a97fab83691b96c6a0
	Fixed in 5.17.14 with commit 9d92291698e5cc35a2b8a1106a01ddd7d60ade2d
	Fixed in 5.18.3 with commit 005fd553f5f10fe8618d92f94ad10f9051eac331
	Fixed in 5.19 with commit 2203436a4d24302871617373a7eb21bc17e38762

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-2022-49525
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/cx25821/cx25821-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/4d6295b6d986476232332fffd08575b185f90d81
	https://git.kernel.org/stable/c/5beb85ff7d005ddb7bf604a4f2dc76f01b84b318
	https://git.kernel.org/stable/c/258639bc55a586ee6df92d89786ccf1c71546d70
	https://git.kernel.org/stable/c/222292930c8ecc3516e03ec1f9fa8448be7ff496
	https://git.kernel.org/stable/c/3f94169affa33c9db4a439d88f09cb2ed3a33332
	https://git.kernel.org/stable/c/1f0fc1dfb5fdd456657519a97fab83691b96c6a0
	https://git.kernel.org/stable/c/9d92291698e5cc35a2b8a1106a01ddd7d60ade2d
	https://git.kernel.org/stable/c/005fd553f5f10fe8618d92f94ad10f9051eac331
	https://git.kernel.org/stable/c/2203436a4d24302871617373a7eb21bc17e38762