linux-cve-announce - CVE-2025-22098: drm: zynqmp_dp: Fix a deadlock in zynqmp_dp_ignore_hpd

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Message-ID: <2025041620-CVE-2025-22098-ed45@gregkh>
Date: Wed, 16 Apr 2025 16:13:09 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22098: drm: zynqmp_dp: Fix a deadlock in zynqmp_dp_ignore_hpd_set()

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

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

drm: zynqmp_dp: Fix a deadlock in zynqmp_dp_ignore_hpd_set()

Instead of attempting the same mutex twice, lock and unlock it.

This bug has been detected by the Clang thread-safety analyzer.

The Linux kernel CVE team has assigned CVE-2025-22098 to this issue.


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

	Issue introduced in 6.13 with commit 28edaacb821c69241f6c0be6bbd29f7145f1b44f and fixed in 6.13.11 with commit 3f988cd2f65175e79349961a43a9deb115174784
	Issue introduced in 6.13 with commit 28edaacb821c69241f6c0be6bbd29f7145f1b44f and fixed in 6.14.2 with commit 7a8d53aa5b7d2a89cda598239d08423bd66920f1
	Issue introduced in 6.13 with commit 28edaacb821c69241f6c0be6bbd29f7145f1b44f and fixed in 6.15-rc1 with commit f887685ee0eb4ef716391355568181230338f6eb

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-2025-22098
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/xlnx/zynqmp_dp.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/3f988cd2f65175e79349961a43a9deb115174784
	https://git.kernel.org/stable/c/7a8d53aa5b7d2a89cda598239d08423bd66920f1
	https://git.kernel.org/stable/c/f887685ee0eb4ef716391355568181230338f6eb