CVE-2022-49642 Information

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/

Reference

https://git.kernel.org/stable/c/029c1c2059e9c4b38f97a06204cdecd10cfbeb8a https://git.kernel.org/stable/c/2968830c9b47ce093237483c6207c61065712386 https://git.kernel.org/stable/c/9cc8edc571b871d974b3289868553f9ce544aba6 https://git.kernel.org/stable/c/cfa4caf3e881ad6dd366c903c34f1c7f21b857ab https://git.kernel.org/stable/c/d5c315a787652c35045044877a249f7d5c8a4104