| 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-2024-49892: drm/amd/display: Initialize get_bytes_per_element's default to 1 |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Initialize get_bytes_per_element's default to 1 |
| |
| Variables, used as denominators and maybe not assigned to other values, |
| should not be 0. bytes_per_element_y & bytes_per_element_c are |
| initialized by get_bytes_per_element() which should never return 0. |
| |
| This fixes 10 DIVIDE_BY_ZERO issues reported by Coverity. |
| |
| The Linux kernel CVE team has assigned CVE-2024-49892 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.285 with commit 8f0abb39c16e719129de10596b3ae3363fa178b4 |
| Fixed in 5.10.227 with commit f921335123f6620c3dce5c96fbb95f18524a021c |
| Fixed in 5.15.168 with commit 1f9f8186e239222f1c8d3dd73bf3bc6ae86c5e76 |
| Fixed in 6.1.113 with commit a23d6029e730f8a151b1a34afb169baac1274583 |
| Fixed in 6.6.55 with commit c7630935d9a4986e8c0ed91658a781b7a77d73f7 |
| Fixed in 6.10.14 with commit bc00d211da4ffad5314a2043b50bdc8ff8a33724 |
| Fixed in 6.11.3 with commit 3334ab72cbba55a632f24579cd47c4a4e5e69cda |
| Fixed in 6.12 with commit 4067f4fa0423a89fb19a30b57231b384d77d2610 |
| |
| 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-2024-49892 |
| 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/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20v2.c |
| drivers/gpu/drm/amd/display/dc/dml/dcn21/display_rq_dlg_calc_21.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/8f0abb39c16e719129de10596b3ae3363fa178b4 |
| https://git.kernel.org/stable/c/f921335123f6620c3dce5c96fbb95f18524a021c |
| https://git.kernel.org/stable/c/1f9f8186e239222f1c8d3dd73bf3bc6ae86c5e76 |
| https://git.kernel.org/stable/c/a23d6029e730f8a151b1a34afb169baac1274583 |
| https://git.kernel.org/stable/c/c7630935d9a4986e8c0ed91658a781b7a77d73f7 |
| https://git.kernel.org/stable/c/bc00d211da4ffad5314a2043b50bdc8ff8a33724 |
| https://git.kernel.org/stable/c/3334ab72cbba55a632f24579cd47c4a4e5e69cda |
| https://git.kernel.org/stable/c/4067f4fa0423a89fb19a30b57231b384d77d2610 |
