| 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-2024-38663: blk-cgroup: fix list corruption from resetting io stat |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| blk-cgroup: fix list corruption from resetting io stat |
| |
| Since commit 3b8cc6298724 ("blk-cgroup: Optimize blkcg_rstat_flush()"), |
| each iostat instance is added to blkcg percpu list, so blkcg_reset_stats() |
| can't reset the stat instance by memset(), otherwise the llist may be |
| corrupted. |
| |
| Fix the issue by only resetting the counter part. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38663 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit 3b8cc6298724021da845f2f9fd7dd4b6829a6817 and fixed in 6.6.33 with commit d4a60298ac34f027a09f8f893fdbd9e06279bb24 |
| Issue introduced in 6.2 with commit 3b8cc6298724021da845f2f9fd7dd4b6829a6817 and fixed in 6.9.4 with commit 89bb36c72e1951843f9e04dc84412e31fcc849a9 |
| Issue introduced in 6.2 with commit 3b8cc6298724021da845f2f9fd7dd4b6829a6817 and fixed in 6.10 with commit 6da6680632792709cecf2b006f2fe3ca7857e791 |
| |
| 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-2024-38663 |
| 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: |
| block/blk-cgroup.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/d4a60298ac34f027a09f8f893fdbd9e06279bb24 |
| https://git.kernel.org/stable/c/89bb36c72e1951843f9e04dc84412e31fcc849a9 |
| https://git.kernel.org/stable/c/6da6680632792709cecf2b006f2fe3ca7857e791 |
