| 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-2023-52634: drm/amd/display: Fix disable_otg_wa logic |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Fix disable_otg_wa logic |
| |
| [Why] |
| When switching to another HDMI mode, we are unnecesarilly |
| disabling/enabling FIFO causing both HPO and DIG registers to be set at |
| the same time when only HPO is supposed to be set. |
| |
| This can lead to a system hang the next time we change refresh rates as |
| there are cases when we don't disable OTG/FIFO but FIFO is enabled when |
| it isn't supposed to be. |
| |
| [How] |
| Removing the enable/disable FIFO entirely. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52634 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit 8774029f76b9806f2f3586bb0502408076767fd5 and fixed in 6.7.4 with commit ce29728ef6485a367934cc100249c66dd3cde5b6 |
| Issue introduced in 6.7 with commit 8774029f76b9806f2f3586bb0502408076767fd5 and fixed in 6.8 with commit 2ce156482a6fef349d2eba98e5070c412d3af662 |
| |
| 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-2023-52634 |
| 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/clk_mgr/dcn35/dcn35_clk_mgr.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/ce29728ef6485a367934cc100249c66dd3cde5b6 |
| https://git.kernel.org/stable/c/2ce156482a6fef349d2eba98e5070c412d3af662 |
