| 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-2024-49917: drm/amd/display: Add NULL check for clk_mgr and clk_mgr->funcs in dcn30_init_hw |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Add NULL check for clk_mgr and clk_mgr->funcs in dcn30_init_hw |
| |
| This commit addresses a potential null pointer dereference issue in the |
| `dcn30_init_hw` function. The issue could occur when `dc->clk_mgr` or |
| `dc->clk_mgr->funcs` is null. |
| |
| The fix adds a check to ensure `dc->clk_mgr` and `dc->clk_mgr->funcs` 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/dcn30/dcn30_hwseq.c:789 dcn30_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 628) |
| |
| The Linux kernel CVE team has assigned CVE-2024-49917 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.120 with commit 23cb6139543580dc36743586ca86fbb3f7ab2c9d |
| Fixed in 6.6.64 with commit 205e3b96cc9aa9211fd2c849a16245cf236b2d36 |
| Fixed in 6.10.14 with commit 5443c83eb8fd2f88c71ced38848fbf744d6206a2 |
| Fixed in 6.11.3 with commit 56c326577971adc3a230f29dfd3aa3abdd505f5d |
| Fixed in 6.12 with commit cba7fec864172dadd953daefdd26e01742b71a6a |
| |
| 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-2024-49917 |
| 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/dcn30/dcn30_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/23cb6139543580dc36743586ca86fbb3f7ab2c9d |
| https://git.kernel.org/stable/c/205e3b96cc9aa9211fd2c849a16245cf236b2d36 |
| https://git.kernel.org/stable/c/5443c83eb8fd2f88c71ced38848fbf744d6206a2 |
| https://git.kernel.org/stable/c/56c326577971adc3a230f29dfd3aa3abdd505f5d |
| https://git.kernel.org/stable/c/cba7fec864172dadd953daefdd26e01742b71a6a |
