linux-kernel - Re: [PATCH] Make LIST

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] [day] [month] [year] [list]

Message-ID: <4832EBA7.2040007@qumranet.com>
Date:	Tue, 20 May 2008 18:17:59 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH] Make LIST_POISON less deadly (v3)

Andi Kleen wrote:
> Avi Kivity <avi@...ranet.com> writes:
>   
>>  
>> +config ILLEGAL_POINTER_VALUE
>> +       hex
>> +       default 0 if X86_32
>> +       default 0xffffc10000000000 if X86_64
>>     
>
> Don't make it exactly 0xffffc10000000000 but 0xffffc10000000000 + 0x1000000
> or so, otherwise list_entry() users which subtract offsets would still
> end up in user space and there might be actually something in there
> by default.
>   

The poison code adds a large offset (>1MB) so we're safe here.

-- 
error compiling committee.c: too many arguments to function

--
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/