linux-kernel - Re: [PATCH 3/3] x86-64: Rework vsyscall emulation and add vsyscall= parameter

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ad7e51af-a4cf-4b30-972f-8704ef748d24@email.android.com>
Date:	Wed, 10 Aug 2011 16:14:29 -0500
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andrew Lutomirski <luto@....edu>
CC:	x86@...nel.org, Andi Kleen <andi@...stfloor.org>,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	lueckintel@...oo.com, kimwooyoung@...il.com,
	Ingo Molnar <mingo@...e.hu>, Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 3/3] x86-64: Rework vsyscall emulation and add vsyscall= parameter

Andrew Lutomirski <luto@....edu> wrote:

>On Wed, Aug 10, 2011 at 1:21 PM, H. Peter Anvin <hpa@...or.com> wrote:
>> On 08/10/2011 10:15 AM, Andy Lutomirski wrote:
>>> There are three choices:
>>>
>>> vsyscall=native: Vsyscalls are native code that issues the
>>> corresponding syscalls.
>>>
>>> vsyscall=emulate (default): Vsyscalls are emulated by instruction
>>> fault traps, tested in the bad_area path.  The actual contents of
>>> the vsyscall page is the same as the vsyscall=native case except
>>> that it's marked NX.  This way programs that make assumptions about
>>> what the code in the page does will not be confused when they read
>>> that code.
>>>
>>> vsyscall=none: Trying to execute a vsyscall will segfault.
>>>
>>> Signed-off-by: Andy Lutomirski <luto@....edu>
>>
>> Hi Andy,
>>
>> This patch doesn't apply.  What is your baseline for this patch?
>
>My baseline was a commit that probably only lives in my tree, but the
>patches should apply cleanly on top of
>c149a665ac488e0dac22a42287f45ad1bda06ff1, which is the current
>tip/x86/vdso.
>
>--Andy

Please rebase your patch on the current -linus since it appears to have changed since x86/vdso was merged.

    -hpa
-- 
Sent from my mobile phone. Please excuse my brevity and lack of formatting.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/