| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-46699: drm/v3d: Disable preemption while updating GPU stats |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/v3d: Disable preemption while updating GPU stats |
| |
| We forgot to disable preemption around the write_seqcount_begin/end() pair |
| while updating GPU stats: |
| |
| [ ] WARNING: CPU: 2 PID: 12 at include/linux/seqlock.h:221 __seqprop_assert.isra.0+0x128/0x150 [v3d] |
| [ ] Workqueue: v3d_bin drm_sched_run_job_work [gpu_sched] |
| <...snip...> |
| [ ] Call trace: |
| [ ] __seqprop_assert.isra.0+0x128/0x150 [v3d] |
| [ ] v3d_job_start_stats.isra.0+0x90/0x218 [v3d] |
| [ ] v3d_bin_job_run+0x23c/0x388 [v3d] |
| [ ] drm_sched_run_job_work+0x520/0x6d0 [gpu_sched] |
| [ ] process_one_work+0x62c/0xb48 |
| [ ] worker_thread+0x468/0x5b0 |
| [ ] kthread+0x1c4/0x1e0 |
| [ ] ret_from_fork+0x10/0x20 |
| |
| Fix it. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46699 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.10 with commit 6abe93b621ab12e93cf0eb7e42a609b36be32da1 and fixed in 6.10.8 with commit 1e93467ef20308da5a94cde548ee17d523e8ba7b |
| Issue introduced in 6.10 with commit 6abe93b621ab12e93cf0eb7e42a609b36be32da1 and fixed in 6.11 with commit 9d824c7fce58f59982228aa85b0376b113cdfa35 |
| |
| 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-2024-46699 |
| 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/v3d/v3d_sched.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/1e93467ef20308da5a94cde548ee17d523e8ba7b |
| https://git.kernel.org/stable/c/9d824c7fce58f59982228aa85b0376b113cdfa35 |
