linux-kernel - Re: [PATCH] tracing/timerlat: Check tlat_var for NULL in timerlat_fd

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Message-ID: <20240903110035.562fd595@gandalf.local.home>
Date: Tue, 3 Sep 2024 11:00:35 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Tomas Glozar <tglozar@...hat.com>
Cc: linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org,
 jkacur@...hat.com, "Luis Claudio R. Goncalves" <lgoncalv@...hat.com>
Subject: Re: [PATCH] tracing/timerlat: Check tlat_var for NULL in
 timerlat_fd_release

On Tue, 3 Sep 2024 14:47:42 +0200
Tomas Glozar <tglozar@...hat.com> wrote:

> I suggest using the workaround suggested in
> https://lore.kernel.org/linux-trace-kernel/20240823125426.404f2705@gandalf.local.home
> for the time being. Together with the patch that adds locks around
> stopping the threads
> (https://patchwork.kernel.org/project/linux-trace-kernel/patch/20240823102816.5e55753b@gandalf.local.home/),
> this should prevent the kernel panic at least until we have a solution
> for the race itself.

I'll make the first one an official patch and start running it through my
tests. We need something soon, as this is a standing bug in the kernel
where the fix needs to go to stable.

Thanks,

-- Steve