linux-cve-announce - CVE-2025-68749: accel/ivpu: Fix race condition when unbinding BOs

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Message-ID: <2025122417-CVE-2025-68749-1160@gregkh>
Date: Wed, 24 Dec 2025 13:10:25 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68749: accel/ivpu: Fix race condition when unbinding BOs

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

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

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

accel/ivpu: Fix race condition when unbinding BOs

Fix 'Memory manager not clean during takedown' warning that occurs
when ivpu_gem_bo_free() removes the BO from the BOs list before it
gets unmapped. Then file_priv_unbind() triggers a warning in
drm_mm_takedown() during context teardown.

Protect the unmapping sequence with bo_list_lock to ensure the BO is
always fully unmapped when removed from the list. This ensures the BO
is either fully unmapped at context teardown time or present on the
list and unmapped by file_priv_unbind().

The Linux kernel CVE team has assigned CVE-2025-68749 to this issue.


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

	Issue introduced in 6.8 with commit 48aea7f2a2efae6a1bd201061c71a81b3f3b7e55 and fixed in 6.17.13 with commit fb16493ebd8f171bcf0772262619618a131f30f7
	Issue introduced in 6.8 with commit 48aea7f2a2efae6a1bd201061c71a81b3f3b7e55 and fixed in 6.18.2 with commit d71333ffdd3707d84cfb95acfaf8ba892adc066b
	Issue introduced in 6.8 with commit 48aea7f2a2efae6a1bd201061c71a81b3f3b7e55 and fixed in 6.19-rc1 with commit 00812636df370bedf4e44a0c81b86ea96bca8628

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-2025-68749
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/accel/ivpu/ivpu_gem.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/fb16493ebd8f171bcf0772262619618a131f30f7
	https://git.kernel.org/stable/c/d71333ffdd3707d84cfb95acfaf8ba892adc066b
	https://git.kernel.org/stable/c/00812636df370bedf4e44a0c81b86ea96bca8628