linux-kernel - Re: [REGRESSION 6.0.x / 6.1.x] NULL dereferencing at tracing

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Date:   Mon, 31 Oct 2022 05:48:37 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     regressions@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION 6.0.x / 6.1.x] NULL dereferencing at tracing

On Mon, 31 Oct 2022 08:11:28 +0100
Takashi Iwai <tiwai@...e.de> wrote:

> Hi Steven,
> 
> we've got a bug report indicating the NULL dereference at the recent
> tracing changes, showing at the start of KDE.  The details including
> the dmesg are found at:
>   https://bugzilla.opensuse.org/show_bug.cgi?id=1204705
> 
> It was reported at first for 6.0.3, and confirmed that the problem
> persists with 6.1-rc, too.
> 
> The culprit seems to be the commit
> f3ddb74ad0790030c9592229fb14d8c451f4e9a8
>     tracing: Wake up ring buffer waiters on closing of the file
> and reverting it seems fixing the problem.
> 
> Could you take a look?
> 

Thanks for the report, can you send me your .config.

Thanks!

-- Steve