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

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Message-ID: <1535086138.4661.9.camel@gmx.de>
Date:   Fri, 24 Aug 2018 06:48:58 +0200
From:   Mike Galbraith <efault@....de>
To:     Dave Young <dyoung@...hat.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     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 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.

	-Mike