| 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-2024-49915: drm/amd/display: Add NULL check for clk_mgr in dcn32_init_hw |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Add NULL check for clk_mgr in dcn32_init_hw |
| |
| This commit addresses a potential null pointer dereference issue in the |
| `dcn32_init_hw` function. The issue could occur when `dc->clk_mgr` is |
| null. |
| |
| The fix adds a check to ensure `dc->clk_mgr` is not null before |
| accessing its functions. This prevents a potential null pointer |
| dereference. |
| |
| Reported by smatch: |
| drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn32/dcn32_hwseq.c:961 dcn32_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 782) |
| |
| The Linux kernel CVE team has assigned CVE-2024-49915 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.120 with commit 0d94d9cbd9fec7344d230c4f7b781826f7799c60 |
| Fixed in 6.6.64 with commit ec1be3c527b4a5fc85bcc1b0be7cec08bf60c796 |
| Fixed in 6.10.14 with commit f0454b3cb0584a6bf275aeb49be61a760fd546a2 |
| Fixed in 6.11.3 with commit 7d1854c86d02cea8f8a0c0ca05f4ab14292baf3d |
| Fixed in 6.12 with commit c395fd47d1565bd67671f45cca281b3acc2c31ef |
| |
| 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-2024-49915 |
| 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/dcn32/dcn32_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/0d94d9cbd9fec7344d230c4f7b781826f7799c60 |
| https://git.kernel.org/stable/c/ec1be3c527b4a5fc85bcc1b0be7cec08bf60c796 |
| https://git.kernel.org/stable/c/f0454b3cb0584a6bf275aeb49be61a760fd546a2 |
| https://git.kernel.org/stable/c/7d1854c86d02cea8f8a0c0ca05f4ab14292baf3d |
| https://git.kernel.org/stable/c/c395fd47d1565bd67671f45cca281b3acc2c31ef |
