| 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-2024-49901: drm/msm/adreno: Assign msm_gpu->pdev earlier to avoid nullptrs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm/adreno: Assign msm_gpu->pdev earlier to avoid nullptrs |
| |
| There are some cases, such as the one uncovered by Commit 46d4efcccc68 |
| ("drm/msm/a6xx: Avoid a nullptr dereference when speedbin setting fails") |
| where |
| |
| msm_gpu_cleanup() : platform_set_drvdata(gpu->pdev, NULL); |
| |
| is called on gpu->pdev == NULL, as the GPU device has not been fully |
| initialized yet. |
| |
| Turns out that there's more than just the aforementioned path that |
| causes this to happen (e.g. the case when there's speedbin data in the |
| catalog, but opp-supported-hw is missing in DT). |
| |
| Assigning msm_gpu->pdev earlier seems like the least painful solution |
| to this, therefore do so. |
| |
| Patchwork: https://patchwork.freedesktop.org/patch/602742/ |
| |
| The Linux kernel CVE team has assigned CVE-2024-49901 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.6.55 with commit 9288a9676c529ad9c856096db68fad812499bc4a |
| Fixed in 6.10.14 with commit 9773737375b20070ea935203fd66cb9fa17c5acb |
| Fixed in 6.11.3 with commit e8ac2060597a5768e4699bb61d604b4c09927b85 |
| Fixed in 6.12 with commit 16007768551d5bfe53426645401435ca8d2ef54f |
| |
| 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-2024-49901 |
| 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/msm/adreno/adreno_gpu.c |
| drivers/gpu/drm/msm/msm_gpu.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/9288a9676c529ad9c856096db68fad812499bc4a |
| https://git.kernel.org/stable/c/9773737375b20070ea935203fd66cb9fa17c5acb |
| https://git.kernel.org/stable/c/e8ac2060597a5768e4699bb61d604b4c09927b85 |
| https://git.kernel.org/stable/c/16007768551d5bfe53426645401435ca8d2ef54f |
