| 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-2024-26797: drm/amd/display: Prevent potential buffer overflow in map_hw_resources |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Prevent potential buffer overflow in map_hw_resources |
| |
| Adds a check in the map_hw_resources function to prevent a potential |
| buffer overflow. The function was accessing arrays using an index that |
| could potentially be greater than the size of the arrays, leading to a |
| buffer overflow. |
| |
| Adds a check to ensure that the index is within the bounds of the |
| arrays. If the index is out of bounds, an error message is printed and |
| break it will continue execution with just ignoring extra data early to |
| prevent the buffer overflow. |
| |
| Reported by smatch: |
| drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/dml2_wrapper.c:79 map_hw_resources() error: buffer overflow 'dml2->v20.scratch.dml_to_dc_pipe_mapping.disp_cfg_to_stream_id' 6 <= 7 |
| drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/dml2_wrapper.c:81 map_hw_resources() error: buffer overflow 'dml2->v20.scratch.dml_to_dc_pipe_mapping.disp_cfg_to_plane_id' 6 <= 7 |
| |
| The Linux kernel CVE team has assigned CVE-2024-26797 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit 7966f319c66d9468623c6a6a017ecbc0dd79be75 and fixed in 6.7.9 with commit 50a6302cf881f67f1410461a68fe9eabd00ff31d |
| Issue introduced in 6.7 with commit 7966f319c66d9468623c6a6a017ecbc0dd79be75 and fixed in 6.8 with commit 0f8ca019544a252d1afb468ce840c6dcbac73af4 |
| |
| 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-2024-26797 |
| 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/dml2/dml2_wrapper.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/50a6302cf881f67f1410461a68fe9eabd00ff31d |
| https://git.kernel.org/stable/c/0f8ca019544a252d1afb468ce840c6dcbac73af4 |
