| 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-2024-53056: drm/mediatek: Fix potential NULL dereference in mtk_crtc_destroy() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/mediatek: Fix potential NULL dereference in mtk_crtc_destroy() |
| |
| In mtk_crtc_create(), if the call to mbox_request_channel() fails then we |
| set the "mtk_crtc->cmdq_client.chan" pointer to NULL. In that situation, |
| we do not call cmdq_pkt_create(). |
| |
| During the cleanup, we need to check if the "mtk_crtc->cmdq_client.chan" |
| is NULL first before calling cmdq_pkt_destroy(). Calling |
| cmdq_pkt_destroy() is unnecessary if we didn't call cmdq_pkt_create() and |
| it will result in a NULL pointer dereference. |
| |
| The Linux kernel CVE team has assigned CVE-2024-53056 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.17 with commit 7627122fd1c06800a1fe624e9fb3c269796115e8 and fixed in 6.11.7 with commit c60583a87cb4a85b69d1f448f0be5eb6ec62cbb2 |
| Issue introduced in 5.17 with commit 7627122fd1c06800a1fe624e9fb3c269796115e8 and fixed in 6.12 with commit 4018651ba5c409034149f297d3dd3328b91561fd |
| Issue introduced in 5.15.54 with commit 2c4396693698e876e559768d3d3a150c672ec384 |
| |
| 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-2024-53056 |
| 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/mediatek/mtk_crtc.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/c60583a87cb4a85b69d1f448f0be5eb6ec62cbb2 |
| https://git.kernel.org/stable/c/4018651ba5c409034149f297d3dd3328b91561fd |
