Re: [tip:x86/boot] x86/KASLR: Fix boot crash with certain memory configurations

From	Baoquan He <bhe@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [tip:x86/boot] x86/KASLR: Fix boot crash with certain memory configurations
Date	2016-07-10 17:20 +0200
Message-ID	<rToGt-2li-13@gated-at.bofh.it> (permalink)
References	<rTj45-76I-3@gated-at.bofh.it> <rTj45-76I-1@gated-at.bofh.it> <rTl5T-8m4-5@gated-at.bofh.it>
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On 07/10/16 at 01:24pm, Ingo Molnar wrote:
> 
> * Baoquan He <bhe@redhat.com> wrote:
> 
> > Hi Ingo,
> > 
> > I am sorry the previous post didn't contain formal patch log. I made a new one 
> > as below. The boot crash could not only happen with certain memory. Because of 
> > this code bug the regions which need be avoided like the zipped kernel with its 
> > unzipping running code, initrd, kernel command line could be corrupted if 
> > mem_avoid_overlap() can't find the overlap region with the lowest address. But 
> > it's very lucky that Xiaolong's system which has only 300M memory can always 
> > reproduce it. I checked the boog log and found on his system no any other slot 
> > can be chosen except for the original one. If we have a system with large memory 
> > it may not be easy to hit it, at least with low probability since there are many 
> > candidate slots.
> 
> So if it's just a better changelog that what I wrote I wouldn't rebase the commit: 
> there's other commits on top of the fix meanwhile. Should a rebase become 
> necessary at a later point I'll update it with your extended changelog.

Yes, it's just a changelog update, no need to rebase it now.

Thanks
Baoquan

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Re: [tip:x86/boot] x86/KASLR: Fix boot crash with certain memory  configurations Baoquan He <bhe@redhat.com> - 2016-07-10 11:20 +0200
  Re: [tip:x86/boot] x86/KASLR: Fix boot crash with certain memory  configurations Ingo Molnar <mingo@kernel.org> - 2016-07-10 13:30 +0200
    Re: [tip:x86/boot] x86/KASLR: Fix boot crash with certain memory  configurations Baoquan He <bhe@redhat.com> - 2016-07-10 17:20 +0200

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