From: Dave Hansen <dave.hansen@intel.com>
To: Evgeniy Baskov <baskov@ispras.ru>
Cc: Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Alexey Khoroshilov <khoroshilov@ispras.ru>,
linux-hardening@vger.kernel.org
Subject: Re: [RFC PATCH 0/8] x86_64: Harden compressed kernel, part 1
Date: Wed, 3 Aug 2022 07:05:00 -0700 [thread overview]
Message-ID: <973736db-2480-bbaa-d2ce-6e1b6dd2ed0c@intel.com> (raw)
In-Reply-To: <29312ea704885f1b8d3c229e1f22dad7@ispras.ru>
On 8/2/22 16:45, Evgeniy Baskov wrote:
> Partially. We do have known issues because kernel PE image is not
> compliant with the MS PE and COFF specification v8.3 referenced by
> the UEFI specification. UEFI implementations with stricter PE loaders
> (e.g. mentioned above) fail to boot Linux kernel.
That shows me that it's _possible_ to build a more strict PE loader that
wouldn't load Linux. But, in practice is anyone using a more strict PE
loader? Does anyone actually want that in practice? Or, again, is this
more strict PE loader just an academic demonstration?
The README starts:
This branch demonstrates...
That doesn't seem like something that's _important_ to deal with.
Sounds like a proof-of-concept.
Don't get me wrong, I'm all for improving thing, even if the benefits
are far off. But, let's not fool ourselves.
next prev parent reply other threads:[~2022-08-03 14:05 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-01 16:38 Evgeniy Baskov
2022-08-01 16:38 ` [PATCH 1/8] x86/boot: Align vmlinuz sections on page size Evgeniy Baskov
2022-08-01 16:38 ` [PATCH 2/8] x86/build: Remove RWX sections and align on 4KB Evgeniy Baskov
2022-08-01 16:39 ` [PATCH 3/8] x86/boot: Set cr0 to known state in trampoline Evgeniy Baskov
2022-08-01 16:39 ` [PATCH 4/8] x86/boot: Increase boot page table size Evgeniy Baskov
2022-08-01 16:39 ` [PATCH 5/8] x86/boot: Support 4KB pages for identity mapping Evgeniy Baskov
2022-08-01 16:39 ` [PATCH 6/8] x86/boot: Setup memory protection for bzImage code Evgeniy Baskov
2022-08-01 16:39 ` [PATCH 7/8] x86/boot: Map memory explicitly Evgeniy Baskov
2022-08-01 16:39 ` [PATCH 8/8] x86/boot: Remove mapping from page fault handler Evgeniy Baskov
2022-08-01 16:48 ` [RFC PATCH 0/8] x86_64: Harden compressed kernel, part 1 Dave Hansen
2022-08-02 0:25 ` Evgeniy Baskov
2022-08-02 2:41 ` Dave Hansen
2022-08-02 23:45 ` Evgeniy Baskov
2022-08-03 14:05 ` Dave Hansen [this message]
2022-08-04 10:41 ` Evgeniy Baskov
2022-08-04 11:22 ` Greg KH
2022-08-04 14:26 ` Evgeniy Baskov
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