| 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-2024-43826: nfs: pass explicit offset/count to trace events |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nfs: pass explicit offset/count to trace events |
| |
| nfs_folio_length is unsafe to use without having the folio locked and a |
| check for a NULL ->f_mapping that protects against truncations and can |
| lead to kernel crashes. E.g. when running xfstests generic/065 with |
| all nfs trace points enabled. |
| |
| Follow the model of the XFS trace points and pass in an explіcit offset |
| and length. This has the additional benefit that these values can |
| be more accurate as some of the users touch partial folio ranges. |
| |
| The Linux kernel CVE team has assigned CVE-2024-43826 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.3 with commit eb5654b3b89d5e836312cea9f3fdb49457852e89 and fixed in 6.10.3 with commit 387e6e9d110250946df4d4ebef9c2def5c7a4722 |
| Issue introduced in 6.3 with commit eb5654b3b89d5e836312cea9f3fdb49457852e89 and fixed in 6.11 with commit fada32ed6dbc748f447c8d050a961b75d946055a |
| |
| 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-2024-43826 |
| 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: |
| fs/nfs/file.c |
| fs/nfs/nfstrace.h |
| fs/nfs/read.c |
| fs/nfs/write.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/387e6e9d110250946df4d4ebef9c2def5c7a4722 |
| https://git.kernel.org/stable/c/fada32ed6dbc748f447c8d050a961b75d946055a |
