| 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-2022-48883: net/mlx5e: IPoIB, Block PKEY interfaces with less rx queues than parent |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/mlx5e: IPoIB, Block PKEY interfaces with less rx queues than parent |
| |
| A user is able to configure an arbitrary number of rx queues when |
| creating an interface via netlink. This doesn't work for child PKEY |
| interfaces because the child interface uses the parent receive channels. |
| |
| Although the child shares the parent's receive channels, the number of |
| rx queues is important for the channel_stats array: the parent's rx |
| channel index is used to access the child's channel_stats. So the array |
| has to be at least as large as the parent's rx queue size for the |
| counting to work correctly and to prevent out of bound accesses. |
| |
| This patch checks for the mentioned scenario and returns an error when |
| trying to create the interface. The error is propagated to the user. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48883 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.17 with commit be98737a4faa3a0dc1781ced5bbf5c47865e29d7 and fixed in 6.1.7 with commit 5844a46f09f768da866d6b0ffbf1a9073266bf24 |
| Issue introduced in 5.17 with commit be98737a4faa3a0dc1781ced5bbf5c47865e29d7 and fixed in 6.2 with commit 31c70bfe58ef09fe36327ddcced9143a16e9e83d |
| |
| 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-2022-48883 |
| 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/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.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/5844a46f09f768da866d6b0ffbf1a9073266bf24 |
| https://git.kernel.org/stable/c/31c70bfe58ef09fe36327ddcced9143a16e9e83d |
