veth: fix races around rq->rxnotifymasked
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.180 by commit c99e66350ca01d2e7836d80f6f451c0e648bcbe0, it was introduced in version v4.19 by commit 948d4f214fde43743c57aae0c708bff44f6345f2. For more details please see the references link.