afunix: Fix a data-race in unixdgrampeerwake_me().
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 v4.19.247 by commit 95f0ba806277733bf6024e23e27e1be773701cca, it was introduced in version v4.4 by commit 7d267278a9ece963d77eefec61630223fce08c6c. For more details please see the references link.