| 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-2024-35810: drm/vmwgfx: Fix the lifetime of the bo cursor memory |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/vmwgfx: Fix the lifetime of the bo cursor memory |
| |
| The cleanup can be dispatched while the atomic update is still active, |
| which means that the memory acquired in the atomic update needs to |
| not be invalidated by the cleanup. The buffer objects in vmw_plane_state |
| instead of using the builtin map_and_cache were trying to handle |
| the lifetime of the mapped memory themselves, leading to crashes. |
| |
| Use the map_and_cache instead of trying to manage the lifetime of the |
| buffer objects held by the vmw_plane_state. |
| |
| Fixes kernel oops'es in IGT's kms_cursor_legacy forked-bo. |
| |
| The Linux kernel CVE team has assigned CVE-2024-35810 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit bb6780aa5a1d99e86757c0c96bfae65a46cf839e and fixed in 6.6.24 with commit 86cb706a40b7e6b2221ee49a298a65ad9b46c02d |
| Issue introduced in 6.2 with commit bb6780aa5a1d99e86757c0c96bfae65a46cf839e and fixed in 6.7.12 with commit 104a5b2772bc7c0715ae7355ccf9d294a472765c |
| Issue introduced in 6.2 with commit bb6780aa5a1d99e86757c0c96bfae65a46cf839e and fixed in 6.8.3 with commit ed381800ea6d9a4c7f199235a471c0c48100f0ae |
| Issue introduced in 6.2 with commit bb6780aa5a1d99e86757c0c96bfae65a46cf839e and fixed in 6.9 with commit 9a9e8a7159ca09af9b1a300a6c8e8b6ff7501c76 |
| |
| 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-2024-35810 |
| 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/vmwgfx/vmwgfx_kms.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/86cb706a40b7e6b2221ee49a298a65ad9b46c02d |
| https://git.kernel.org/stable/c/104a5b2772bc7c0715ae7355ccf9d294a472765c |
| https://git.kernel.org/stable/c/ed381800ea6d9a4c7f199235a471c0c48100f0ae |
| https://git.kernel.org/stable/c/9a9e8a7159ca09af9b1a300a6c8e8b6ff7501c76 |
