linux-cve-announce - CVE-2025-38353: drm/xe: Fix taking invalid lock on wedge

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Message-ID: <2025072553-CVE-2025-38353-a9eb@gregkh>
Date: Fri, 25 Jul 2025 14:47:54 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38353: drm/xe: Fix taking invalid lock on wedge

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

drm/xe: Fix taking invalid lock on wedge

If device wedges on e.g. GuC upload, the submission is not yet enabled
and the state is not even initialized. Protect the wedge call so it does
nothing in this case. It fixes the following splat:

	[] xe 0000:bf:00.0: [drm] device wedged, needs recovery
	[] ------------[ cut here ]------------
	[] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
	[] WARNING: CPU: 48 PID: 312 at kernel/locking/mutex.c:564 __mutex_lock+0x8a1/0xe60
	...
	[] RIP: 0010:__mutex_lock+0x8a1/0xe60
	[]  mutex_lock_nested+0x1b/0x30
	[]  xe_guc_submit_wedge+0x80/0x2b0 [xe]

The Linux kernel CVE team has assigned CVE-2025-38353 to this issue.


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

	Fixed in 6.12.36 with commit a6d81b2d7037ef36163ad16459ed3fd17cb1b596
	Fixed in 6.15.5 with commit 20eec7018e132a023f84ccbdf56b6c5b73d3094f
	Fixed in 6.16-rc1 with commit 1e1981b16bb1bbe2fafa57ed439b45cb5b34e32d

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-2025-38353
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/xe/xe_guc_submit.c
	drivers/gpu/drm/xe/xe_guc_types.h


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/a6d81b2d7037ef36163ad16459ed3fd17cb1b596
	https://git.kernel.org/stable/c/20eec7018e132a023f84ccbdf56b6c5b73d3094f
	https://git.kernel.org/stable/c/1e1981b16bb1bbe2fafa57ed439b45cb5b34e32d