linux-kernel - Re: do_coredump and O

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Message-ID: <46C2B35B.5080709@alcatel-lucent.com>
Date:	Wed, 15 Aug 2007 16:03:39 +0800
From:	gshan <gshan@...atel-lucent.com>
To:	Bernd Eckenfels <ecki@...a.inka.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: do_coredump and O_NOFOLLOW

Bernd Eckenfels wrote:
> In article <46C290F6.2090309@...atel-lucent.com> you wrote:
>   
>> I found that O_NOFOLLOW is used for opened core file in Linux 2.6.10. 
>>     
>
> I think that is for security reasons, otherwise one has to (atomically)
> check who is the owner of the symlink and where it points to. If you dont
> have hostile users on your system you might be able to remove it, but it is
> not a good idea in the general public.
>
> Maybe we need a coreadm tool like Solaris has, where you can put the
> corefiles where you want. That would change the corepattern to include a
> path and be specific to a process (tree).
>
> Gruss
> Bernd
> -
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>   
Bernd, Thanks for your reply. I don't think there are any hostile users 
on the system. So it's relatively of security. I didn't hear of coreadm 
tool before, Linux will become more powerful with coreadm.
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