| 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-2022-49668: PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events |
| |
| of_get_child_by_name() returns a node pointer with refcount |
| incremented, we should use of_node_put() on it when done. |
| This function only calls of_node_put() in normal path, |
| missing it in error paths. |
| Add missing of_node_put() to avoid refcount leak. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49668 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.0 with commit f262f28c147051e7aa6daaf4fb5996833ffadff4 and fixed in 5.4.204 with commit bdecd912e99acfd61507f1720d3f4eed1b3418d8 |
| Issue introduced in 4.0 with commit f262f28c147051e7aa6daaf4fb5996833ffadff4 and fixed in 5.10.129 with commit e65027fdebbacd40595e96ef7b5d2418f71bddf2 |
| Issue introduced in 4.0 with commit f262f28c147051e7aa6daaf4fb5996833ffadff4 and fixed in 5.15.53 with commit 01121e39ef537289926ae6f5374dce92c796d863 |
| Issue introduced in 4.0 with commit f262f28c147051e7aa6daaf4fb5996833ffadff4 and fixed in 5.18.10 with commit 194781229d4cbc804b8ded13156eb8addce87d6c |
| Issue introduced in 4.0 with commit f262f28c147051e7aa6daaf4fb5996833ffadff4 and fixed in 5.19 with commit f44b799603a9b5d2e375b0b2d54dd0b791eddfc2 |
| |
| 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-2022-49668 |
| 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/devfreq/event/exynos-ppmu.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/bdecd912e99acfd61507f1720d3f4eed1b3418d8 |
| https://git.kernel.org/stable/c/e65027fdebbacd40595e96ef7b5d2418f71bddf2 |
| https://git.kernel.org/stable/c/01121e39ef537289926ae6f5374dce92c796d863 |
| https://git.kernel.org/stable/c/194781229d4cbc804b8ded13156eb8addce87d6c |
| https://git.kernel.org/stable/c/f44b799603a9b5d2e375b0b2d54dd0b791eddfc2 |
