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

From	Masami Hiramatsu <mhiramat@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] x86/ftrace: Make sure that ftrace trampolines are not RWX
Date	2017-05-26 03:40 +0200
Message-ID	<tLcop-7Hu-5@gated-at.bofh.it> (permalink)
References	(2 earlier) <tKJZ8-6lc-13@gated-at.bofh.it> <tKMWZ-8aU-5@gated-at.bofh.it> <tKWWl-6hJ-11@gated-at.bofh.it> <tKYlr-70D-9@gated-at.bofh.it> <tL2Iq-1qK-27@gated-at.bofh.it>
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On Thu, 25 May 2017 11:18:02 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Thu, 25 May 2017 19:34:43 +0900
> Masami Hiramatsu <mhiramat@kernel.org> 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?

Yes, however, it should be included after my fix is
accepted, or it can cause a kernel panic...

Thanks,



-- 
Masami Hiramatsu <mhiramat@kernel.org>

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Re: [PATCH] x86/ftrace: Make sure that ftrace trampolines are not  RWX Masami Hiramatsu <mhiramat@kernel.org> - 2017-05-25 11:10 +0200
  Re: [PATCH] x86/ftrace: Make sure that ftrace trampolines are not  RWX Masami Hiramatsu <mhiramat@kernel.org> - 2017-05-25 12:40 +0200
    Re: [PATCH] x86/ftrace: Make sure that ftrace trampolines are not  RWX Steven Rostedt <rostedt@goodmis.org> - 2017-05-25 17:20 +0200
      Re: [PATCH] x86/ftrace: Make sure that ftrace trampolines are not  RWX Masami Hiramatsu <mhiramat@kernel.org> - 2017-05-26 03:40 +0200

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