linux-kernel - Re: [PATCH] ring-buffer: Fix deadloop issue on reading trace

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Message-ID: <10aa72df-b5e7-6666-7f4d-4810884b7aa2@huawei.com>
Date:   Thu, 13 Jul 2023 09:52:20 +0800
From:   Zheng Yejian <zhengyejian1@...wei.com>
To:     Steven Rostedt <rostedt@...dmis.org>
CC:     <mhiramat@...nel.org>, <linux-kernel@...r.kernel.org>,
        <linux-trace-kernel@...r.kernel.org>
Subject: Re: [PATCH] ring-buffer: Fix deadloop issue on reading trace_pipe

On 2023/7/13 00:14, Steven Rostedt wrote:
> On Mon, 10 Jul 2023 09:37:52 +0800
> Zheng Yejian <zhengyejian1@...wei.com> wrote:
> 
>> teve, IIUC, following tags should be added?
>>
>> Cc: stable@...r.kernel.org
>> Fixes: 48fdc72f23ad ("ring-buffer: Fix accounting of entries when
>> removing pages")
>> Fixes: 83f40318dab0 ("ring-buffer: Make removal of ring buffer pages
>> atomic")
> 
> I actually added:
> 
> Fixes: a5fb833172eca ("ring-buffer: Fix uninitialized read_stamp")
> 
> -- Steve
> 

Yes, a5fb833172eca directly cause the deadloop issue.

--

Thanks,
Zheng Yejian