linux-kernel - Re: [PATCH] x86, kdump: Fix efi=noruntime NULL pointer dereference

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Message-ID: <20180824064938.GA5316@dhcp-128-65.nay.redhat.com>
Date:   Fri, 24 Aug 2018 14:49:38 +0800
From:   Dave Young <dyoung@...hat.com>
To:     Mike Galbraith <efault@....de>
Cc:     Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Baoquan He <bhe@...hat.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        lkml <linux-kernel@...r.kernel.org>,
        Kexec Mailing List <kexec@...ts.infradead.org>,
        linux-efi <linux-efi@...r.kernel.org>
Subject: Re: [PATCH] x86, kdump: Fix efi=noruntime NULL pointer dereference

On 08/24/18 at 06:48am, Mike Galbraith wrote:
> On Thu, 2018-08-23 at 11:57 +0800, Dave Young wrote:
> > 
> > Mike, since we are going this way, I'm working on a kexec code cleanup,
> > but it needs careful testing so still need some time.
> > 
> > Can you help test below efi fix and provide you tested-by if it works?
> 
> While it averts the efi=noruntime oops on kdump kernel load, the kernel
> does not boot when kdump is triggered.  Bailing in setup_efi_state() in
> addition restores functionality.

Yes, that is expected.  Kexec code need fix and cleanup in other
patches.

Thanks
Dave