drop_monitor: fix data-race in dropmon_net_event / trace_napi_poll_hit
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 v4.9.303 by commit aeeaa9c5c2283a64cefdc4ea88e1935de82b3b56, it was introduced in version v2.6.31 by commit 4ea7e38696c7e798c47ebbecadfd392f23f814f9. For more details please see the references link.