Re: [PATCH] x86/ftrace: Make sure that ftrace trampolines are not RWX

[Steven Rostedt]

On Thu, 25 May 2017 19:34:43 +0900
Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote:


> OK, I've ensured that following command hits same BUG.
> 
> grep t /proc/kallsyms  | cut -f3 -d" " | grep -v .*\\..* | \
> head -n 256 | while read i; do echo p $i+5 ; done >
> tracing/kprobe_events
> 
> echo 1 > tracing/events/kprobes/enable 
> echo 0 > tracing/events/kprobes/enable
> echo > tracing/kprobe_events
> sleep 5

Hi Masami,

Can you add a selftest that checks this too?

Thanks!

-- Steve

> 
> I'll send a bugfix asap.
> 
> Thank,
>