[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CA+55aFxLEL+8YA4MYkeyeUH7K8rZwBmGe6Z9V8QS=TYCREWDTQ@mail.gmail.com>
Date: Tue, 30 Jan 2018 11:38:35 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Dan Williams <dan.j.williams@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>,
linux-arch <linux-arch@...r.kernel.org>, Cyril Novikov <cnovikov@...x.com>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>, Peter Zijlstra <peterz@...radead.org>,
Catalin Marinas <catalin.marinas@....com>, X86 ML <x86@...nel.org>,
Will Deacon <will.deacon@....com>, Russell King <linux@...linux.org.uk>,
Ingo Molnar <mingo@...hat.com>, Greg KH <gregkh@...uxfoundation.org>,
"H. Peter Anvin" <hpa@...or.com>, Alan Cox <alan@...ux.intel.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 02/12] array_idx: sanitize speculative array de-references
On Mon, Jan 29, 2018 at 10:29 PM, Dan Williams <dan.j.williams@...el.com> wrote:
>
> Of course, and everything about the technical feedback and suggestions
> was completely valid, on point, and made the patches that much better.
> What wasn't appreciated and what I am tired of grinning and bearing is
> the idea that it's only the maintainer that can show emotion, that
> it's only the maintainer that can be exasperated and burnt out.
Yeah, I think everybody is a bit tired of - and burnt out by - these
patches, and they are subtler and somewhat more core than most are,
which makes the stakes a bit higher too, and the explanations can be a
bit more difficult.
I think everybody is entitled to being a bit snippy occasionally.
Definitely not just maintainers.
So by all means, push right back.
Anyway, I do think the patches I've seen so far are ok, and the real
reason I'm writing this email is actually more about future patches:
do we have a good handle on where these array index sanitations will
be needed?
Also, while array limit checking was obviously the official
"spectre-v1" issue, I do wonder if there are possible other issues
where mispredicted conditional branches can end up leaking
information?
IOW, is there some work on tooling/analysis/similar? Not asking for
near-term, but more of a "big picture" question..
Linus
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
