Received-SPF: pass (google.com: domain of linux-kernel+bounces-191493-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3;
Date: Mon, 27 May 2024 18:31:39 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@leemhuis.info>
Cc: Linux regressions mailing list <regressions@lists.linux.dev>, Ilkka
 =?UTF-8?B?TmF1bGFww6TDpA==?= <digirigawa@gmail.com>,
 stable@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-trace-kernel@vger.kernel.org
Subject: Re: Bug in Kernel 6.8.x, 6.9.x Causing Trace/Panic During
 Shutdown/Reboot
Message-ID: <20240527183139.42b6123c@rorschach.local.home>
In-Reply-To: <5b79732b-087c-411f-a477-9b837566673e@leemhuis.info>
References: <CAE4VaREzY+a2PvQJYJbfh8DwB4OP7kucZG-e28H22xyWob1w_A@mail.gmail.com>
	<5b79732b-087c-411f-a477-9b837566673e@leemhuis.info>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

On Fri, 24 May 2024 12:50:08 +0200
"Linux regression tracking (Thorsten Leemhuis)" <regressions@leemhuis.info> wrote:

> > - Affected Versions: Before kernel version 6.8.10, the bug caused a
> > quick display of a kernel trace dump before the shutdown/reboot
> > completed. Starting from version 6.8.10 and continuing into version
> > 6.9.0 and 6.9.1, this issue has escalated to a kernel panic,
> > preventing the shutdown or reboot from completing and leaving the
> > machine stuck.

You state "Before kernel version 6.8.10, the bug caused ...". Does that
mean that a bug was happening before v6.8.10? But did not cause a panic?

I just noticed your second screen shot from your report, and it has:

 "cache_from_obj: Wrong slab cache, tracefs_inode_cache but object is from inode_cache"

So somehow an tracefs_inode was allocated from the inode_cache and is
now being freed by the tracefs_inode logic? Did this happen before
6.8.10? If so, this code could just be triggering an issue from an
unrelated bug.

Thanks,

-- Steve