Re: [PATCH for-next v3] tracing/kprobes: Add symbol counting check when module loads

[Steven Rostedt]

On Fri,  5 Jul 2024 16:11:25 +0900
"Masami Hiramatsu (Google)" <mhiramat@xxxxxxxxxx> wrote:

> From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
> 
> Currently, kprobe event checks whether the target symbol name is unique
> or not, so that it does not put a probe on an unexpected place. But this
> skips the check if the target is on a module because the module may not
> be loaded.
> 
> To fix this issue, this patch checks the number of probe target symbols
> in a target module when the module is loaded. If the probe is not on the
> unique name symbols in the module, it will be rejected at that point.
> 
> Note that the symbol which has a unique name in the target module,
> it will be accepted even if there are same-name symbols in the
> kernel or other modules,
> 
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>

Reviewed-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>

-- Steve