From: Ingo Molnar <mingo@elte.hu>
To: richard -rw- weinberger <richard.weinberger@gmail.com>
Cc: Andrew Lutomirski <luto@mit.edu>,
Linus Torvalds <torvalds@linux-foundation.org>,
Adrian Bunk <bunk@stusta.de>,
"H. Peter Anvin" <hpa@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] fixing the UML failure root cause
Date: Sat, 15 Oct 2011 18:57:57 +0200 [thread overview]
Message-ID: <20111015165757.GA29782@elte.hu> (raw)
In-Reply-To: <CAFLxGvxgDQDzgWHZxS5m+9m84dsONEdmmmZhpsvVfRUH5CYTFQ@mail.gmail.com>
* richard -rw- weinberger <richard.weinberger@gmail.com> wrote:
> On Fri, Oct 14, 2011 at 10:17 PM, Andrew Lutomirski <luto@mit.edu> wrote:
> > On Fri, Oct 14, 2011 at 12:53 PM, richard -rw- weinberger
> > <richard.weinberger@gmail.com> wrote:
> >> On Tue, Oct 11, 2011 at 7:24 PM, Andrew Lutomirski <luto@mit.edu> wrote:
> >>> What do you think of this approach? If it seems good, I'll finish the
> >>> patch and submit it.
> >>>
> >>> With this patch applied, UML appears to work, but it fills the log with
> >>> exploit attempt warnings. Any ideas on what to do about that?
> >>>
> >>
> >> I can confirm that this patch works.
> >> And I really like vsyscall=emulate because with that UML can trap vsyscalls. :-)
> >
> > Are you sure you don't mean vsyscall=native? I suspect that UML can't
> > actually trap vsyscalls in emulate mode right now, although that ought
> > to be fixable.
> >
>
> §/%)"&!, you are so right!
> I missed that vsyscall=native is the default setting now.
> Sorry for the confusion.
Switch back to vsyscall=native was just a temporary ABI fix for v3.1
- we'd like to switch to vsyscall=emulate again ASAP (possibly in
v3.2), once Andrew is done with the patch and everyone is happy with
it.
Thanks,
Ingo
next prev parent reply other threads:[~2011-10-15 16:59 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-03 9:08 [3.1 patch] x86: default to vsyscall=native Adrian Bunk
2011-10-03 13:04 ` Andrew Lutomirski
2011-10-03 17:33 ` Adrian Bunk
2011-10-03 18:06 ` Andrew Lutomirski
2011-10-03 18:41 ` Adrian Bunk
2011-10-05 22:13 ` Andrew Lutomirski
2011-10-05 22:22 ` richard -rw- weinberger
2011-10-05 22:30 ` Adrian Bunk
2011-10-05 22:41 ` richard -rw- weinberger
2011-10-05 22:46 ` Andrew Lutomirski
2011-10-05 23:36 ` Andrew Lutomirski
2011-10-06 3:06 ` Andrew Lutomirski
2011-10-06 12:12 ` richard -rw- weinberger
2011-10-06 15:37 ` richard -rw- weinberger
2011-10-06 18:16 ` Andrew Lutomirski
2011-10-06 18:34 ` Linus Torvalds
2011-10-07 0:48 ` Andrew Lutomirski
2011-10-10 11:19 ` richard -rw- weinberger
2011-10-10 11:48 ` Ingo Molnar
2011-10-10 15:31 ` Andrew Lutomirski
2011-10-11 6:22 ` Ingo Molnar
2011-10-11 17:24 ` [RFC] fixing the UML failure root cause Andrew Lutomirski
2011-10-13 6:19 ` Linus Torvalds
2011-10-13 8:40 ` Andrew Lutomirski
2011-10-14 4:46 ` Linus Torvalds
2011-10-14 6:30 ` Andrew Lutomirski
2011-10-14 20:10 ` Linus Torvalds
2011-10-21 21:01 ` [PATCH] x86-64: Set siginfo and context on vsyscall emulation faults Andy Lutomirski
2011-10-22 4:46 ` Linus Torvalds
2011-10-22 9:07 ` Andy Lutomirski
2011-11-08 0:33 ` [PATCH 0/2] Fix and re-enable vsyscall=emulate Andy Lutomirski
2011-11-08 0:33 ` [PATCH 1/2] x86-64: Set siginfo and context on vsyscall emulation faults Andy Lutomirski
2011-12-05 13:23 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2011-11-08 0:33 ` [PATCH 2/2] x86: Default to vsyscall=emulate Andy Lutomirski
2011-12-05 13:24 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2011-12-02 22:47 ` [PATCH 0/2] Fix and re-enable vsyscall=emulate Andy Lutomirski
2011-12-05 11:18 ` H. Peter Anvin
2011-10-14 19:53 ` [RFC] fixing the UML failure root cause richard -rw- weinberger
2011-10-14 20:17 ` Andrew Lutomirski
2011-10-14 20:23 ` richard -rw- weinberger
2011-10-14 20:31 ` Andrew Lutomirski
2011-10-14 20:39 ` richard -rw- weinberger
2011-10-14 22:28 ` richard -rw- weinberger
2011-10-15 16:57 ` Ingo Molnar [this message]
2011-10-05 22:24 ` [3.1 patch] x86: default to vsyscall=native Adrian Bunk
2011-10-03 13:19 ` richard -rw- weinberger
2011-10-03 17:46 ` Adrian Bunk
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