| 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-2022-48690: ice: Fix DMA mappings leak |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ice: Fix DMA mappings leak |
| |
| Fix leak, when user changes ring parameters. |
| During reallocation of RX buffers, new DMA mappings are created for |
| those buffers. New buffers with different RX ring count should |
| substitute older ones, but those buffers were freed in ice_vsi_cfg_rxq |
| and reallocated again with ice_alloc_rx_buf. kfree on rx_buf caused |
| leak of already mapped DMA. |
| Reallocate ZC with xdp_buf struct, when BPF program loads. Reallocate |
| back to rx_buf, when BPF program unloads. |
| If BPF program is loaded/unloaded and XSK pools are created, reallocate |
| RX queues accordingly in XDP_SETUP_XSK_POOL handler. |
| |
| Steps for reproduction: |
| while : |
| do |
| for ((i=0; i<=8160; i=i+32)) |
| do |
| ethtool -G enp130s0f0 rx $i tx $i |
| sleep 0.5 |
| ethtool -g enp130s0f0 |
| done |
| done |
| |
| The Linux kernel CVE team has assigned CVE-2022-48690 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.16 with commit 617f3e1b588c802517c236087561c6bcb0b4afd6 and fixed in 5.19.9 with commit 07f40e9f0ff342eb3e97d5c544783b7cb641689c |
| Issue introduced in 5.16 with commit 617f3e1b588c802517c236087561c6bcb0b4afd6 and fixed in 6.0 with commit 7e753eb675f0523207b184558638ee2eed6c9ac2 |
| |
| 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-2022-48690 |
| 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/intel/ice/ice_base.c |
| drivers/net/ethernet/intel/ice/ice_main.c |
| drivers/net/ethernet/intel/ice/ice_xsk.c |
| drivers/net/ethernet/intel/ice/ice_xsk.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/07f40e9f0ff342eb3e97d5c544783b7cb641689c |
| https://git.kernel.org/stable/c/7e753eb675f0523207b184558638ee2eed6c9ac2 |
