linux-kernel - [PATCH v2 0/7] tracing: fprobe-events: Register fprobe only when the event is enabled

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Message-ID: <174343532655.843280.15317319860632975273.stgit@devnote2>
Date: Tue,  1 Apr 2025 00:35:26 +0900
From: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Subject: [PATCH v2 0/7] tracing: fprobe-events: Register fprobe only when the event is enabled

Hi,
Here is the 2nd version of the series to register fprobe only when the
fprobe event is enabled. The previous version is here;

https://lore.kernel.org/all/174212767109.348872.18231451508464729427.stgit@devnote2/

In this version, I added fixes([1/7] and [2/7]) related to module
unloading ([1/7] should be handled separatedly) and updates
according to the previous thread.

Steve suggested the fprobe-events are always registered when it is
defined, even if it is disabled and that makes system overhead.
This series registeres the fprobes only when the event is enabled.

Thank you,

---

Masami Hiramatsu (Google) (7):
      tracing: fprobe events: Fix possible UAF on modules
      tracing: fprobe: Cleanup fprobe hash when module unloading
      tracing: tprobe-events: Remove mod field from tprobe-event
      tracing: tprobe-events: Support multiple tprobes on the same tracepoint
      tracing: fprobe-events: Register fprobe-events only when it is enabled
      selftests: tracing: Enable fprobe events before checking enable_functions
      tracing: tprobe-events: Register tracepoint when enable tprobe event


 include/linux/fprobe.h                             |    5 
 include/linux/module.h                             |    4 
 kernel/trace/fprobe.c                              |  108 ++++
 kernel/trace/trace_fprobe.c                        |  593 +++++++++++++-------
 .../ftrace/test.d/dynevent/add_remove_fprobe.tc    |   30 +
 5 files changed, 531 insertions(+), 209 deletions(-)

--
Masami Hiramatsu (Google) <mhiramat@...nel.org>