linux-cve-announce - CVE-2025-37907: accel/ivpu: Fix locking order in ivpu_job

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Message-ID: <2025052057-CVE-2025-37907-7b62@gregkh>
Date: Tue, 20 May 2025 17:22:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37907: accel/ivpu: Fix locking order in ivpu_job_submit

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

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

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

accel/ivpu: Fix locking order in ivpu_job_submit

Fix deadlock in job submission and abort handling.
When a thread aborts currently executing jobs due to a fault,
it first locks the global lock protecting submitted_jobs (#1).

After the last job is destroyed, it proceeds to release the related context
and locks file_priv (#2). Meanwhile, in the job submission thread,
the file_priv lock (#2) is taken first, and then the submitted_jobs
lock (#1) is obtained when a job is added to the submitted jobs list.

       CPU0                            CPU1
       ----                    	       ----
  (for example due to a fault)         (jobs submissions keep coming)

  lock(&vdev->submitted_jobs_lock) #1
  ivpu_jobs_abort_all()
  job_destroy()
                                      lock(&file_priv->lock)           #2
                                      lock(&vdev->submitted_jobs_lock) #1
  file_priv_release()
  lock(&vdev->context_list_lock)
  lock(&file_priv->lock)           #2

This order of locking causes a deadlock. To resolve this issue,
change the order of locking in ivpu_job_submit().

The Linux kernel CVE team has assigned CVE-2025-37907 to this issue.


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

	Fixed in 6.12.28 with commit 079d2622f8c9e0c380149645fff21d35c59ce6ff
	Fixed in 6.14.6 with commit b9b70924a272c2d72023306bc56f521c056212ee
	Fixed in 6.15-rc1 with commit ab680dc6c78aa035e944ecc8c48a1caab9f39924

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-2025-37907
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_job.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/079d2622f8c9e0c380149645fff21d35c59ce6ff
	https://git.kernel.org/stable/c/b9b70924a272c2d72023306bc56f521c056212ee
	https://git.kernel.org/stable/c/ab680dc6c78aa035e944ecc8c48a1caab9f39924