Re: [PATCH 2/8] tracing: tprobe-events: Reject invalid tracepoint name

On Wed, 26 Feb 2025 15:18:54 +0900
"Masami Hiramatsu (Google)" [off-list ref] wrote:

From: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Commit 57a7e6de9e30 ("tracing/fprobe: Support raw tracepoints on
future loaded modules") allows user to set a tprobe on non-exist
tracepoint but it does not check the tracepoint name is acceptable.
So it leads tprobe has a wrong character for events (e.g. with
subsystem prefix). In this case, the event is not shown in the
events directory.

Reject such invalid tracepoint name.

The tracepoint name must consist of alphabet or digit or '_'.

Fixes: 57a7e6de9e30 ("tracing/fprobe: Support raw tracepoints on future loaded modules")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: stable@vger.kernel.org

Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>

-- Steve

---
 kernel/trace/trace_fprobe.c |   13 +++++++++++++
 kernel/trace/trace_probe.h  |    1 +
 2 files changed, 14 insertions(+)