tcp: annotate data-race around challenge_timestamp
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 v5.10.142 by commit f3d1554d0f67b7d0620b97032842735b3fdcdffe, it was introduced in version v3.8 by commit 354e4aa391ed50a4d827ff6fc11e0667d0859b25. For more details please see the references link.