| From bippy-1.2.0 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-2023-52732: ceph: blocklist the kclient when receiving corrupted snap trace |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ceph: blocklist the kclient when receiving corrupted snap trace |
| |
| When received corrupted snap trace we don't know what exactly has |
| happened in MDS side. And we shouldn't continue IOs and metadatas |
| access to MDS, which may corrupt or get incorrect contents. |
| |
| This patch will just block all the further IO/MDS requests |
| immediately and then evict the kclient itself. |
| |
| The reason why we still need to evict the kclient just after |
| blocking all the further IOs is that the MDS could revoke the caps |
| faster. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52732 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 6.1.13 with commit 66ec619e4591f8350f99c5269a7ce160cccc7a7c |
| Issue introduced in 2.6.34 with commit 9030aaf9bf0a1eee47a154c316c789e959638b0f and fixed in 6.2 with commit a68e564adcaa69b0930809fb64d9d5f7d9c32ba9 |
| |
| 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-2023-52732 |
| 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/ceph/addr.c |
| fs/ceph/caps.c |
| fs/ceph/file.c |
| fs/ceph/mds_client.c |
| fs/ceph/snap.c |
| fs/ceph/super.h |
| |
| |
| 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/66ec619e4591f8350f99c5269a7ce160cccc7a7c |
| https://git.kernel.org/stable/c/a68e564adcaa69b0930809fb64d9d5f7d9c32ba9 |
