net: Fix a data-race around sysctl_net_busy_read.
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 v5.15.64 by commit 8e9e124aeb9c204198c8a60dff5e64d423356196, it was introduced in version v3.11 by commit 2d48d67fa8cd129ea85ea02d91b4a793286866f8. For more details please see the references link.