linux-kernel - Re: dell_smbios KASAN bug

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Message-ID: <1553108749.2079.1.camel@gmail.com>
Date:   Wed, 20 Mar 2019 14:05:49 -0500
From:   Tom Zanussi <tzanussi@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Pali Rohár <pali.rohar@...il.com>,
        Mario Limonciello <mario.limonciello@...l.com>,
        linux-kernel@...r.kernel.org
Subject: Re: dell_smbios KASAN bug

On Wed, 2019-03-20 at 14:41 -0400, Steven Rostedt wrote:
> On Wed, 20 Mar 2019 13:29:20 -0500
> Tom Zanussi <tzanussi@...il.com> wrote:
> 
> > Hi,
> > 
> > While looking into an unrelated problem, I hit this KASAN use-
> > after-
> > free warning, so thought I'd let you know.
> > 
> > I have no idea how to fix it, but let me know if you need more
> > info.
> > 
> 
> Could you run with debug in the kernel command line, and see if you
> hit
> any failed messages from the dell_smbios_init() call?
> 

Not much, but this looks relevant:

[   26.783749] dell_smbios: No SMBIOS backends available (wmi: -19,
smm: -19)
[   26.963648] dell_smbios: No dell-smbios drivers are loaded

Tom

> 
> -- Steve