| 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-2022-48671: cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all() |
| |
| syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) warning at |
| cpuset_attach() [1], for commit 4f7e7236435ca0ab ("cgroup: Fix |
| threadgroup_rwsem <-> cpus_read_lock() deadlock") missed that |
| cpuset_attach() is also called from cgroup_attach_task_all(). |
| Add cpus_read_lock() like what cgroup_procs_write_start() does. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48671 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4.213 with commit 59c6902a96b4439e07c25ef86a4593bea5481c3b and fixed in 5.4.215 with commit 07191f984842d50020789ff14c75da436a7f46a9 |
| Issue introduced in 5.10.143 with commit dee1e2b18cf5426eed985512ccc6636ec69dbdd6 and fixed in 5.10.145 with commit 9f267393b036f1470fb12fb892d59e7ff8aeb58d |
| Issue introduced in 5.15.68 with commit 3bf4bf54069f9b62a54988e5d085023c17a66c90 and fixed in 5.15.70 with commit 5db17805b6ba4c34dab303f49aea3562fc25af75 |
| Issue introduced in 5.19.9 with commit c0deb027c99c099aa6b831e326bfba802b25e774 and fixed in 5.19.11 with commit 99bc25748e394d17f9e8b10cc7f273b8e64c1c7e |
| |
| 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-2022-48671 |
| 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: |
| kernel/cgroup/cgroup-v1.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/321488cfac7d0eb6d97de467015ff754f85813ff |
| https://git.kernel.org/stable/c/07191f984842d50020789ff14c75da436a7f46a9 |
| https://git.kernel.org/stable/c/9f267393b036f1470fb12fb892d59e7ff8aeb58d |
| https://git.kernel.org/stable/c/5db17805b6ba4c34dab303f49aea3562fc25af75 |
| https://git.kernel.org/stable/c/99bc25748e394d17f9e8b10cc7f273b8e64c1c7e |
| https://git.kernel.org/stable/c/43626dade36fa74d3329046f4ae2d7fdefe401c6 |
