Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Subject: Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Fri, 24 Mar 2017 10:36:15 +0100
Cc: Dave Young <dyoung@xxxxxxxxxx>, Baoquan He <bhe@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, x86@xxxxxxxxxx, linux-efi@xxxxxxxxxxxxxxx, Thomas Garnier <thgarnie@xxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>, Bhupesh Sharma <bhsharma@xxxxxxxxxx>
In-reply-to: <20170324092433.GA3237@gmail.com>
User-agent: NeoMutt/20170113 (1.7.2)

On Fri, Mar 24, 2017 at 10:24:34AM +0100, Ingo Molnar wrote:
> Preserving virtual addresses for kexec is a red herring: the randomized offset 
> could be passed to the kexec-ed kernel just fine.

Not only that - kexec'ed kernel gets the addresses from sysfs so we can randomize.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

References:
- [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
  - From: Baoquan He
- Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
  - From: Ingo Molnar
- Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
  - From: Baoquan He
- Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
  - From: Dave Young
- Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
  - From: Ingo Molnar

Prev by Date: Re: [PATCH v2] KVM: kvm_io_bus_unregister_dev() should never fail
Next by Date: Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
Previous by thread: Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
Next by thread: Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
Index(es):
- Date
- Thread

[Index of Archives] [Linux Kernel] [Kernel Development Newbies] [Linux USB Devel] [Video for Linux] [Linux Audio Users] [Yosemite Hiking] [Linux Kernel] [Linux SCSI]