| 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-2023-52624: drm/amd/display: Wake DMCUB before executing GPINT commands |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Wake DMCUB before executing GPINT commands |
| |
| [Why] |
| DMCUB can be in idle when we attempt to interface with the HW through |
| the GPINT mailbox resulting in a system hang. |
| |
| [How] |
| Add dc_wake_and_execute_gpint() to wrap the wake, execute, sleep |
| sequence. |
| |
| If the GPINT executes successfully then DMCUB will be put back into |
| sleep after the optional response is returned. |
| |
| It functions similar to the inbox command interface. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52624 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.7.3 with commit 2ef98c6d753a744e333b7e34b9cf687040fba57d |
| Fixed in 6.8 with commit e5ffd1263dd5b44929c676171802e7b6af483f21 |
| |
| 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-2023-52624 |
| 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/amdgpu_dm/amdgpu_dm_debugfs.c |
| drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c |
| drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h |
| drivers/gpu/drm/amd/display/dc/dce/dmub_psr.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/2ef98c6d753a744e333b7e34b9cf687040fba57d |
| https://git.kernel.org/stable/c/e5ffd1263dd5b44929c676171802e7b6af483f21 |
