Re: [PATCH v7 08/18] static_call: Avoid kprobes on inline static_call()s

[peterz]

On Wed, Sep 02, 2020 at 10:35:08AM +0900, Masami Hiramatsu wrote:
> On Tue, 18 Aug 2020 15:57:43 +0200
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 
> > Similar to how we disallow kprobes on any other dynamic text
> > (ftrace/jump_label) also disallow kprobes on inline static_call()s.
> 
> Looks good to me. 
> 
> Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
> 
> BTW, here we already have 5 subsystems which reserves texts
> (ftrace, alternatives, jump_label, static_call and kprobes.)
> 
> Except for the kprobes and ftrace, we can generalize the reserved-text
> code because those are section-based static address-areas (or lists).

Doesn't ftrace also have a section where it lists all the mcount
locations?

On top of that ftrace probably registers its trampolines.

Do we support adding kprobes to BPF-JIT'ed code or should we blacklist
them too?