| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-43904: drm/amd/display: Add null checks for 'stream' and 'plane' before dereferencing |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Add null checks for 'stream' and 'plane' before dereferencing |
| |
| This commit adds null checks for the 'stream' and 'plane' variables in |
| the dcn30_apply_idle_power_optimizations function. These variables were |
| previously assumed to be null at line 922, but they were used later in |
| the code without checking if they were null. This could potentially lead |
| to a null pointer dereference, which would cause a crash. |
| |
| The null checks ensure that 'stream' and 'plane' are not null before |
| they are used, preventing potential crashes. |
| |
| Fixes the below static smatch checker: |
| drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:938 dcn30_apply_idle_power_optimizations() error: we previously assumed 'stream' could be null (see line 922) |
| drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:940 dcn30_apply_idle_power_optimizations() error: we previously assumed 'plane' could be null (see line 922) |
| |
| The Linux kernel CVE team has assigned CVE-2024-43904 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.15.181 with commit fcf9d6a9f30ea414b6b84a6e901cebd44e146847 |
| Fixed in 6.1.116 with commit 5e84eda48ffb2363437db44bbd0235594f8a58f9 |
| Fixed in 6.6.60 with commit 10c20d79d59cadfe572480d98cec271a89ffb024 |
| Fixed in 6.10.5 with commit 16a8a2a839d19c4cf7253642b493ffb8eee1d857 |
| Fixed in 6.11 with commit 15c2990e0f0108b9c3752d7072a97d45d4283aea |
| |
| 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-2024-43904 |
| 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/fcf9d6a9f30ea414b6b84a6e901cebd44e146847 |
| https://git.kernel.org/stable/c/5e84eda48ffb2363437db44bbd0235594f8a58f9 |
| https://git.kernel.org/stable/c/10c20d79d59cadfe572480d98cec271a89ffb024 |
| https://git.kernel.org/stable/c/16a8a2a839d19c4cf7253642b493ffb8eee1d857 |
| https://git.kernel.org/stable/c/15c2990e0f0108b9c3752d7072a97d45d4283aea |
