Re: [RFC PATCH] tracing: Fix syscall tracepoint use-after-free

[Steven Rostedt]

On Wed, 23 Oct 2024 11:13:53 -0400
Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> wrote:

> That question is relevant for ftrace and perf too: are there data
> structures that are reclaimed with call_rcu() after being unregistered
> from syscall tracepoints ?

ftrace doesn't assume RCU for when to synchronize with tracepoints
being unregistered. It uses:

  tracepoint_synchronize_unregister()

-- Steve