| 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-2024-49914: drm/amd/display: Add null check for pipe_ctx->plane_state in dcn20_program_pipe |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Add null check for pipe_ctx->plane_state in dcn20_program_pipe |
| |
| This commit addresses a null pointer dereference issue in the |
| `dcn20_program_pipe` function. The issue could occur when |
| `pipe_ctx->plane_state` is null. |
| |
| The fix adds a check to ensure `pipe_ctx->plane_state` is not null |
| before accessing. This prevents a null pointer dereference. |
| |
| Reported by smatch: |
| drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn20/dcn20_hwseq.c:1925 dcn20_program_pipe() error: we previously assumed 'pipe_ctx->plane_state' could be null (see line 1877) |
| |
| The Linux kernel CVE team has assigned CVE-2024-49914 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.6.64 with commit 68f75e6f08aad66069a629db8d7840919156c761 |
| Fixed in 6.11.3 with commit 65a6fee22d5cfa645cb05489892dc9cd3d142fc2 |
| Fixed in 6.12 with commit 8e4ed3cf1642df0c4456443d865cff61a9598aa8 |
| |
| 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-2024-49914 |
| 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/hwss/dcn20/dcn20_hwseq.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/68f75e6f08aad66069a629db8d7840919156c761 |
| https://git.kernel.org/stable/c/65a6fee22d5cfa645cb05489892dc9cd3d142fc2 |
| https://git.kernel.org/stable/c/8e4ed3cf1642df0c4456443d865cff61a9598aa8 |
