Re: [PATCH -v5 00/17] Rewrite x86/ftrace to use text_poke (and more)

Alexei Starovoitov
2019-11-27T04:32:44Z

On Tue, Nov 26, 2019 at 4:03 PM Alexei Starovoitov
<alexei.starovoitov@gmail.com> wrote:
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>
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> On Tue, Nov 26, 2019 at 3:49 PM Masami Hiramatsu <mhiramat@kernel.org> wrote:
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>> On Tue, 26 Nov 2019 18:58:09 +0900
>> Masami Hiramatsu <mhiramat@kernel.org> wrote:
>> > I applied following patch, but it seems not enough. While disabling 256 kprobes,
>> > system was frozen (no BUG message).
>>
>> Aah, this is another bug in optprobe. I'll send a series for fix these bugs.
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> Awesome! I’ve started looking at this crash as well.
> Could you share a brief description of the bug and cc me on fixes?
> I’d like to test them too.
> Thanks

I noticed that your config doesn't have CONFIG_KPROBES_ON_FTRACE=y
and without it most test.d/kprobe/ tests fail, but in your log they are passing.
Also do you have KPROBE_EVENTS_ON_NOTRACE=y ?
Since without these two configs the crash wasn't reproducing for me.
Anyhow waiting for your fixes.