| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-53097: powerpc/iommu: fix memory leak with using debugfs_lookup() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| powerpc/iommu: fix memory leak with using debugfs_lookup() |
| |
| When calling debugfs_lookup() the result must have dput() called on it, |
| otherwise the memory will leak over time. To make things simpler, just |
| call debugfs_lookup_and_remove() instead which handles all of the logic |
| at once. |
| |
| The Linux kernel CVE team has assigned CVE-2023-53097 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.15.103 with commit e3a62a35f903fd8be5b44542fe3901ec45f16757 |
| Fixed in 6.1.20 with commit 24c1bd1cd0d1ff821fd7d2f01a1e648c7882dfc2 |
| Fixed in 6.2.7 with commit 4050498c0ae3946c223fc63e9dd7b878b76611e0 |
| Fixed in 6.3 with commit b505063910c134778202dfad9332dfcecb76bab3 |
| |
| 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-2023-53097 |
| 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: |
| arch/powerpc/kernel/iommu.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/e3a62a35f903fd8be5b44542fe3901ec45f16757 |
| https://git.kernel.org/stable/c/24c1bd1cd0d1ff821fd7d2f01a1e648c7882dfc2 |
| https://git.kernel.org/stable/c/4050498c0ae3946c223fc63e9dd7b878b76611e0 |
| https://git.kernel.org/stable/c/b505063910c134778202dfad9332dfcecb76bab3 |
