| From bippy-7c5fe7eed585 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-2024-35836: dpll: fix pin dump crash for rebound module |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| dpll: fix pin dump crash for rebound module |
| |
| When a kernel module is unbound but the pin resources were not entirely |
| freed (other kernel module instance of the same PCI device have had kept |
| the reference to that pin), and kernel module is again bound, the pin |
| properties would not be updated (the properties are only assigned when |
| memory for the pin is allocated), prop pointer still points to the |
| kernel module memory of the kernel module which was deallocated on the |
| unbind. |
| |
| If the pin dump is invoked in this state, the result is a kernel crash. |
| Prevent the crash by storing persistent pin properties in dpll subsystem, |
| copy the content from the kernel module when pin is allocated, instead of |
| using memory of the kernel module. |
| |
| The Linux kernel CVE team has assigned CVE-2024-35836 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit 9431063ad323ac864750aeba4d304389bc42ca4e and fixed in 6.7.3 with commit 5050a5b9d8b4d3c6f7e376e07670e437db7ccf9c |
| Issue introduced in 6.7 with commit 9431063ad323ac864750aeba4d304389bc42ca4e and fixed in 6.8 with commit 830ead5fb0c5855ce4d70ba2ed4a673b5f1e7d9b |
| |
| 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-2024-35836 |
| 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/dpll/dpll_core.c |
| drivers/dpll/dpll_core.h |
| drivers/dpll/dpll_netlink.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/5050a5b9d8b4d3c6f7e376e07670e437db7ccf9c |
| https://git.kernel.org/stable/c/830ead5fb0c5855ce4d70ba2ed4a673b5f1e7d9b |
