| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37907: accel/ivpu: Fix locking order in ivpu_job_submit |
| |
| 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 |
| =========================== |
| |
| Issue introduced in 6.3 with commit 35b137630f08d913fc2e33df33ccc2570dff3f7d and fixed in 6.12.28 with commit 079d2622f8c9e0c380149645fff21d35c59ce6ff |
| Issue introduced in 6.3 with commit 35b137630f08d913fc2e33df33ccc2570dff3f7d and fixed in 6.14.6 with commit b9b70924a272c2d72023306bc56f521c056212ee |
| Issue introduced in 6.3 with commit 35b137630f08d913fc2e33df33ccc2570dff3f7d and fixed in 6.15 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 |
