From: Borislav Petkov <bp@alien8.de>
To: Ingo Molnar <mingo@kernel.org>
Cc: Dave Young <dyoung@redhat.com>, Baoquan He <bhe@redhat.com>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, linux-efi@vger.kernel.org,
Thomas Garnier <thgarnie@google.com>,
Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Bhupesh Sharma <bhsharma@redhat.com>
Subject: Re: [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization
Date: Fri, 24 Mar 2017 10:36:15 +0100 [thread overview]
Message-ID: <20170324093615.ac4gf5odamcdxjnw@pd.tnic> (raw)
In-Reply-To: <20170324092433.GA3237@gmail.com>
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.
next prev parent reply other threads:[~2017-03-24 9:36 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-24 4:59 [PATCH v2] x86/mm/KASLR: EFI region is mistakenly included into KASLR VA space for randomization Baoquan He
2017-03-24 4:59 ` Baoquan He
2017-03-24 8:08 ` Ingo Molnar
2017-03-24 8:08 ` Ingo Molnar
2017-03-24 8:34 ` Baoquan He
2017-03-24 8:34 ` Baoquan He
2017-03-24 8:46 ` Dave Young
2017-03-24 8:46 ` Dave Young
2017-03-24 9:24 ` Ingo Molnar
2017-03-24 9:36 ` Borislav Petkov [this message]
2017-03-24 9:37 ` Ard Biesheuvel
2017-03-24 9:37 ` Ard Biesheuvel
2017-03-24 9:40 ` Borislav Petkov
2017-03-24 9:42 ` Ard Biesheuvel
2017-03-24 9:46 ` Borislav Petkov
2017-03-24 9:46 ` Borislav Petkov
2017-03-24 9:52 ` Ard Biesheuvel
2017-03-24 9:52 ` Ard Biesheuvel
2017-03-24 10:36 ` Ingo Molnar
2017-03-24 10:36 ` Ingo Molnar
2017-03-24 10:42 ` Ard Biesheuvel
2017-03-24 10:54 ` Ingo Molnar
2017-03-24 11:52 ` Baoquan He
2017-03-24 8:53 ` Dave Young
2017-03-24 8:10 ` [tip:x86/urgent] x86/mm/KASLR: Exclude EFI region from KASLR VA space randomization tip-bot for Baoquan He
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