net sched act_gate

The net sched act_gate tag covers discussions about the Linux kernel's act_gate traffic-control action, which is part of the network scheduler subsystem. Recent content focuses on a security fix for a schedule-lifetime race condition (CVE-2026-23245) that can occur when the gate is replaced while the hrtimer callback or dump path is traversing the schedule list. The fix converts action parameters into an RCU-protected snapshot, swaps updates under an existing lock, and frees the old snapshot with call_rcu(). This surgical synchronization change is important for production stability. The tag is relevant for Linux kernel developers, network engineers, and system administrators working with traffic control and kernel patching.