linux-kernel - Re: [GIT PULL] x86/vdso changes for v3.1

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 for Android: free password hash cracker in your pocket

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

Message-ID: <4E56A9DE.7040909@zytor.com>
Date:	Thu, 25 Aug 2011 13:00:30 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andrew Lutomirski <luto@....edu>
CC:	Arnaud Lacombe <lacombar@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] x86/vdso changes for v3.1

On 08/25/2011 12:55 PM, Andrew Lutomirski wrote:
> On Thu, Aug 25, 2011 at 3:51 PM, H. Peter Anvin <hpa@...or.com> wrote:
>> On 08/25/2011 12:47 PM, Arnaud Lacombe wrote:
>>>
>>> CPU: Intel QEMU Virtual CPU version 0.14.50 stepping 03
>>> About to apply_alternatives
>>> start=c13bee88 a=0 instr_offset=-3922530 instr=cpu_idle+0x26/0x60
>>> repl_offset=2336 repl=__alt_instructions_end+0x0/0x29f instrlen=5
>>> repllen=3
>>>   done
>>
>> Since this is a QEMU setup, could you share enough of the setup to
>> reproduce?
> 
> qemu-kvm -net none -kernel arch/x86/boot/bzImage -smp 2 -cpu host
> -nographic -append console=ttyS0
> 
> With Arnaud's 'dot-config' on the v3.1-rc3 tag.  Triggers instantly.
> It's definitely dependent on the config.
> 
> Is there any binutils magic to find out which file a particular
> address in .altinstructions came from?  I don't think there are
> meaningful symbols near it.
> 

addr2line might be able to tell you.

	-hpa

--
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/