linux-kernel - Re: [PATCH] selftests/ftrace: Correctly enable event in instance-event.tc

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Message-ID: <20230905163255.1bda4d2f@gandalf.local.home>
Date:   Tue, 5 Sep 2023 16:32:55 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Zheng Yejian <zhengyejian1@...wei.com>
Cc:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        Ajay Kaher <akaher@...are.com>, <shuah@...nel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-trace-kernel@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Ye Weihua <yeweihua4@...wei.com>
Subject: Re: [PATCH] selftests/ftrace: Correctly enable event in
 instance-event.tc

On Tue, 5 Sep 2023 14:45:52 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Tue, 5 Sep 2023 20:54:40 +0800
> Zheng Yejian <zhengyejian1@...wei.com> wrote:
> 
> > Hi, Steve, Ajay,
> > 
> > After this patch and run this testcase, I got an use-after-free report
> > by KASAN. Short log see [1], full logs see attach "panic.log".
> > 
> > And by simple bisect, I found it may be introduced by:
> > 
> >    27152bceea1d ("eventfs: Move tracing/events to eventfs")  
> 
> Can you send me your config?
>

Never mind, I triggered it. I believe I see the bug.

-- Steve