| 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-2024-56683: drm/vc4: hdmi: Avoid hang with debug registers when suspended |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/vc4: hdmi: Avoid hang with debug registers when suspended |
| |
| Trying to read /sys/kernel/debug/dri/1/hdmi1_regs |
| when the hdmi is disconnected results in a fatal system hang. |
| |
| This is due to the pm suspend code disabling the dvp clock. |
| That is just a gate of the 108MHz clock in DVP_HT_RPI_MISC_CONFIG, |
| which results in accesses hanging AXI bus. |
| |
| Protect against this. |
| |
| The Linux kernel CVE team has assigned CVE-2024-56683 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.0 with commit 25eb441d55d479581a65bcc9de88bc1d86bf76c1 and fixed in 6.1.120 with commit 0ea29bd7d9400d3629683244d609358ed1b12075 |
| Issue introduced in 6.0 with commit 25eb441d55d479581a65bcc9de88bc1d86bf76c1 and fixed in 6.6.64 with commit c7d474974954d9af7e0092021223d58f2de128df |
| Issue introduced in 6.0 with commit 25eb441d55d479581a65bcc9de88bc1d86bf76c1 and fixed in 6.11.11 with commit 16f351adf733a182224ad24916d7673aa6df02df |
| Issue introduced in 6.0 with commit 25eb441d55d479581a65bcc9de88bc1d86bf76c1 and fixed in 6.12.2 with commit 74f21be9990a42dc2357bcf87a13e16c6998b90e |
| Issue introduced in 6.0 with commit 25eb441d55d479581a65bcc9de88bc1d86bf76c1 and fixed in 6.13 with commit 223ee2567a55e4f80315c768d2969e6a3b9fb23d |
| Issue introduced in 5.18.18 with commit 1da00a63f0e798f0fd0dcf623b16c16e13f93615 |
| Issue introduced in 5.19.2 with commit f70c25cf34f91cc6f40e79a5b7565fd0272d7396 |
| |
| 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-2024-56683 |
| 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/vc4/vc4_hdmi.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/0ea29bd7d9400d3629683244d609358ed1b12075 |
| https://git.kernel.org/stable/c/c7d474974954d9af7e0092021223d58f2de128df |
| https://git.kernel.org/stable/c/16f351adf733a182224ad24916d7673aa6df02df |
| https://git.kernel.org/stable/c/74f21be9990a42dc2357bcf87a13e16c6998b90e |
| https://git.kernel.org/stable/c/223ee2567a55e4f80315c768d2969e6a3b9fb23d |
