| 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-2024-50090: drm/xe/oa: Fix overflow in oa batch buffer |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/xe/oa: Fix overflow in oa batch buffer |
| |
| By default xe_bb_create_job() appends a MI_BATCH_BUFFER_END to batch |
| buffer, this is not a problem if batch buffer is only used once but |
| oa reuses the batch buffer for the same metric and at each call |
| it appends a MI_BATCH_BUFFER_END, printing the warning below and then |
| overflowing. |
| |
| [ 381.072016] ------------[ cut here ]------------ |
| [ 381.072019] xe 0000:00:02.0: [drm] Assertion `bb->len * 4 + bb_prefetch(q->gt) <= size` failed! |
| platform: LUNARLAKE subplatform: 1 |
| graphics: Xe2_LPG / Xe2_HPG 20.04 step B0 |
| media: Xe2_LPM / Xe2_HPM 20.00 step B0 |
| tile: 0 VRAM 0 B |
| GT: 0 type 1 |
| |
| So here checking if batch buffer already have MI_BATCH_BUFFER_END if |
| not append it. |
| |
| v2: |
| - simply fix, suggestion from Ashutosh |
| |
| (cherry picked from commit 9ba0e0f30ca42a98af3689460063edfb6315718a) |
| |
| The Linux kernel CVE team has assigned CVE-2024-50090 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit dd08ebf6c3525a7ea2186e636df064ea47281987 and fixed in 6.11.4 with commit bcb5be3421705e682b0b32073ad627056d6bc2a2 |
| Issue introduced in 6.8 with commit dd08ebf6c3525a7ea2186e636df064ea47281987 and fixed in 6.12 with commit 6c10ba06bb1b48acce6d4d9c1e33beb9954f1788 |
| |
| 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-2024-50090 |
| 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_bb.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/bcb5be3421705e682b0b32073ad627056d6bc2a2 |
| https://git.kernel.org/stable/c/6c10ba06bb1b48acce6d4d9c1e33beb9954f1788 |
