| 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-2022-49642: net: stmmac: dwc-qos: Disable split header for Tegra194 |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: stmmac: dwc-qos: Disable split header for Tegra194 |
| |
| There is a long-standing issue with the Synopsys DWC Ethernet driver |
| for Tegra194 where random system crashes have been observed [0]. The |
| problem occurs when the split header feature is enabled in the stmmac |
| driver. In the bad case, a larger than expected buffer length is |
| received and causes the calculation of the total buffer length to |
| overflow. This results in a very large buffer length that causes the |
| kernel to crash. Why this larger buffer length is received is not clear, |
| however, the feedback from the NVIDIA design team is that the split |
| header feature is not supported for Tegra194. Therefore, disable split |
| header support for Tegra194 to prevent these random crashes from |
| occurring. |
| |
| [0] https://lore.kernel.org/linux-tegra/b0b17697-f23e-8fa5-3757-604a86f3a095@nvidia.com/ |
| |
| The Linux kernel CVE team has assigned CVE-2022-49642 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4 with commit 67afd6d1cfdf0d0461fe3c4c922447f3e9b1c6ee and fixed in 5.4.207 with commit 2968830c9b47ce093237483c6207c61065712386 |
| Issue introduced in 5.4 with commit 67afd6d1cfdf0d0461fe3c4c922447f3e9b1c6ee and fixed in 5.10.132 with commit 9cc8edc571b871d974b3289868553f9ce544aba6 |
| Issue introduced in 5.4 with commit 67afd6d1cfdf0d0461fe3c4c922447f3e9b1c6ee and fixed in 5.15.56 with commit d5c315a787652c35045044877a249f7d5c8a4104 |
| Issue introduced in 5.4 with commit 67afd6d1cfdf0d0461fe3c4c922447f3e9b1c6ee and fixed in 5.18.13 with commit cfa4caf3e881ad6dd366c903c34f1c7f21b857ab |
| Issue introduced in 5.4 with commit 67afd6d1cfdf0d0461fe3c4c922447f3e9b1c6ee and fixed in 5.19 with commit 029c1c2059e9c4b38f97a06204cdecd10cfbeb8a |
| |
| 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-2022-49642 |
| 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/stmicro/stmmac/dwmac-dwc-qos-eth.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/2968830c9b47ce093237483c6207c61065712386 |
| https://git.kernel.org/stable/c/9cc8edc571b871d974b3289868553f9ce544aba6 |
| https://git.kernel.org/stable/c/d5c315a787652c35045044877a249f7d5c8a4104 |
| https://git.kernel.org/stable/c/cfa4caf3e881ad6dd366c903c34f1c7f21b857ab |
| https://git.kernel.org/stable/c/029c1c2059e9c4b38f97a06204cdecd10cfbeb8a |
