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Date:   Tue, 5 Sep 2023 18:36:38 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Zheng Yejian <zhengyejian1@huawei.com>
Cc:     "Masami Hiramatsu (Google)" <mhiramat@kernel.org>,
        Ajay Kaher <akaher@vmware.com>, <shuah@kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-trace-kernel@vger.kernel.org>,
        <linux-kselftest@vger.kernel.org>,
        Shuah Khan <skhan@linuxfoundation.org>,
        Ye Weihua <yeweihua4@huawei.com>
Subject: Re: [PATCH] selftests/ftrace: Correctly enable event in
 instance-event.tc
Message-ID: <20230905183638.2b539fae@gandalf.local.home>
In-Reply-To: <1cb3aee2-19af-c472-e265-05176fe9bd84@huawei.com>
References: <20230626001144.2635956-1-zhengyejian1@huawei.com>
        <20230626191114.8c5a66fbaa28af3c303923bd@kernel.org>
        <20230626191255.53baab4ed48d7111dcd44cad@kernel.org>
        <20230710183741.78f04c68@gandalf.local.home>
        <1cb3aee2-19af-c472-e265-05176fe9bd84@huawei.com>
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On Tue, 5 Sep 2023 20:54:40 +0800
Zheng Yejian <zhengyejian1@huawei.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")
> 
> Link: 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=27152bceea1df27ffebb12ac9cd9adbf2c4c3f35

Hi Zheng,

Can you test:

   https://lore.kernel.org/all/20230905183332.628d7cc0@gandalf.local.home/

and see if it fixes the KASAN issue for you?

Thanks!

-- Steve