| 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-2024-46846: spi: rockchip: Resolve unbalanced runtime PM / system PM handling |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spi: rockchip: Resolve unbalanced runtime PM / system PM handling |
| |
| Commit e882575efc77 ("spi: rockchip: Suspend and resume the bus during |
| NOIRQ_SYSTEM_SLEEP_PM ops") stopped respecting runtime PM status and |
| simply disabled clocks unconditionally when suspending the system. This |
| causes problems when the device is already runtime suspended when we go |
| to sleep -- in which case we double-disable clocks and produce a |
| WARNing. |
| |
| Switch back to pm_runtime_force_{suspend,resume}(), because that still |
| seems like the right thing to do, and the aforementioned commit makes no |
| explanation why it stopped using it. |
| |
| Also, refactor some of the resume() error handling, because it's not |
| actually a good idea to re-disable clocks on failure. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46846 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.18 with commit e882575efc771f130a24322377dc1033551da11d and fixed in 6.1.110 with commit 14f970a8d03d882b15b97beb83bd84ac8ba6298c |
| Issue introduced in 5.18 with commit e882575efc771f130a24322377dc1033551da11d and fixed in 6.6.51 with commit d034bff62faea1a2219e0d2f3d17263265f24087 |
| Issue introduced in 5.18 with commit e882575efc771f130a24322377dc1033551da11d and fixed in 6.10.10 with commit 0efbad8445fbba7896402500a1473450a299a08a |
| Issue introduced in 5.18 with commit e882575efc771f130a24322377dc1033551da11d and fixed in 6.11 with commit be721b451affbecc4ba4eaac3b71cdbdcade1b1b |
| |
| 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-2024-46846 |
| 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/spi/spi-rockchip.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/14f970a8d03d882b15b97beb83bd84ac8ba6298c |
| https://git.kernel.org/stable/c/d034bff62faea1a2219e0d2f3d17263265f24087 |
| https://git.kernel.org/stable/c/0efbad8445fbba7896402500a1473450a299a08a |
| https://git.kernel.org/stable/c/be721b451affbecc4ba4eaac3b71cdbdcade1b1b |
