| 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-2024-43872: RDMA/hns: Fix soft lockup under heavy CEQE load |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/hns: Fix soft lockup under heavy CEQE load |
| |
| CEQEs are handled in interrupt handler currently. This may cause the |
| CPU core staying in interrupt context too long and lead to soft lockup |
| under heavy load. |
| |
| Handle CEQEs in BH workqueue and set an upper limit for the number of |
| CEQE handled by a single call of work handler. |
| |
| The Linux kernel CVE team has assigned CVE-2024-43872 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.16 with commit a5073d6054f75d7c94b3354206eec4b804d2fbd4 and fixed in 6.10.3 with commit 06580b33c183c9f98e2a2ca96a86137179032c08 |
| Issue introduced in 4.16 with commit a5073d6054f75d7c94b3354206eec4b804d2fbd4 and fixed in 6.11 with commit 2fdf34038369c0a27811e7b4680662a14ada1d6b |
| |
| 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-2024-43872 |
| 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: |
| drivers/infiniband/hw/hns/hns_roce_device.h |
| drivers/infiniband/hw/hns/hns_roce_hw_v2.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/06580b33c183c9f98e2a2ca96a86137179032c08 |
| https://git.kernel.org/stable/c/2fdf34038369c0a27811e7b4680662a14ada1d6b |
