linux-kernel - Re: [tip:x86/urgent] x86/mm: Fix boot crash caused by incorrect loop count calculation in sync_global

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Message-ID: <20170627111255.GF10609@kroah.com>
Date:   Tue, 27 Jun 2017 13:12:55 +0200
From:   Greg KH <greg@...ah.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Dave Young <dyoung@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "H. Peter Anvin" <hpa@...or.com>, jinb.park7@...il.com,
        jpoimboe@...hat.com, Ingo Molnar <mingo@...nel.org>,
        Yasuaki Ishimatsu <yasu.isimatu@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jeff Moyer <jmoyer@...hat.com>, yinghai@...nel.org,
        luto@...nel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Thomas Garnier <thgarnie@...gle.com>,
        Baoquan He <bhe@...hat.com>, dvlasenk@...hat.com,
        Borislav Petkov <bp@...en8.de>, brgerst@...il.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>, stable@...r.kernel.org,
        linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86/mm: Fix boot crash caused by incorrect loop
 count calculation in sync_global_pgds()

On Wed, Jun 21, 2017 at 06:26:59PM -0700, Dan Williams wrote:
> [ adding -stable ]
> 
> The patch below is upstream as commit fc5f9d5f151c "x86/mm: Fix boot
> crash caused by incorrect loop count calculation in
> sync_global_pgds()". The referenced bug potentially affects all kaslr
> enabled kernels with > 512GB of memory. Please apply this patch to all
> current -stable kernels.

Doesn't apply to any stable kernels that I manage, can someone please
provide a working backport if they want to see it applied?

thanks,

greg k-h