From: Joerg Roedel <joro@8bytes.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Arvind Sankar <nivedita@alum.mit.edu>,
hpa@zytor.com, Andy Lutomirski <luto@amacapital.net>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Joerg Roedel <jroedel@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86/idt: Make sure idt_table takes a whole page
Date: Tue, 21 Jul 2020 11:09:01 +0200 [thread overview]
Message-ID: <20200721090901.GC620@8bytes.org> (raw)
In-Reply-To: <87sgdmm8u4.fsf@nanos.tec.linutronix.de>
On Mon, Jul 20, 2020 at 06:48:03PM +0200, Thomas Gleixner wrote:
> But with explicit sections which store only page aligned objects there
> is an implicit guarantee that the object is alone in the page in which
> it is placed. That works for all objects except the last one. That's
> inconsistent.
>
> By enforcing page sized objects for this section you might also wreckage
> memory sanitizers, because your object is artificially larger than it
> should be and out of bound access becomes legit.
Okay, valid points about the consistency and the memory sanitizers. I'll
submit a patch for the linker scripts soon.
Regards,
Joerg
prev parent reply other threads:[~2020-07-21 9:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 10:33 [PATCH] x86/idt: Make sure idt_table takes a whole page Joerg Roedel
2020-07-18 17:56 ` hpa
2020-07-18 19:25 ` Andy Lutomirski
2020-07-19 1:15 ` hpa
2020-07-19 2:34 ` Arvind Sankar
2020-07-19 10:39 ` Thomas Gleixner
2020-07-20 16:11 ` Joerg Roedel
2020-07-20 16:48 ` Thomas Gleixner
2020-07-21 9:09 ` Joerg Roedel [this message]
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