linux-cve-announce - CVE-2025-38309: drm/xe/vm: move xe_svm

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Message-ID: <2025071014-CVE-2025-38309-9638@gregkh>
Date: Thu, 10 Jul 2025 09:42:50 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38309: drm/xe/vm: move xe_svm_init() earlier

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

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

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

drm/xe/vm: move xe_svm_init() earlier

In xe_vm_close_and_put() we need to be able to call xe_svm_fini(),
however during vm creation we can call this on the error path, before
having actually initialised the svm state, leading to various splats
followed by a fatal NPD.

(cherry picked from commit 4f296d77cf49fcb5f90b4674123ad7f3a0676165)

The Linux kernel CVE team has assigned CVE-2025-38309 to this issue.


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

	Issue introduced in 6.15 with commit 6fd979c2f33150e8261d87d2946f94f66f22ddaa and fixed in 6.15.3 with commit f5e6a6a8aa46d44ec7a240766cf3b7dd077718b9
	Issue introduced in 6.15 with commit 6fd979c2f33150e8261d87d2946f94f66f22ddaa and fixed in 6.16-rc1 with commit 8cf8cde41ad01150afbd1327ad1942387787f7fd

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-2025-38309
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_vm.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/f5e6a6a8aa46d44ec7a240766cf3b7dd077718b9
	https://git.kernel.org/stable/c/8cf8cde41ad01150afbd1327ad1942387787f7fd