From: Peter Waechtler <pwaechtler@mac.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, torvalds@osdl.org
Subject: Re: [PATCH] coredump - as root not only if euid switched
Date: Thu, 22 Apr 2004 11:40:50 +0200 [thread overview]
Message-ID: <2899705.1082626850875.JavaMail.pwaechtler@mac.com> (raw)
On Thursday, April 22, 2004, at 10:55AM, Andrew Morton <akpm@osdl.org> wrote:
>Peter Waechtler <pwaechtler@mac.com> wrote:
>>
>> But I agree that sys_unlink should be the fast call and dumping core
>> is the exception :)
>>
>> would fastcall do_unlink() help? I guess the arg is then passed in a
>> register
>
>I've never been able to measure any size or space benefit for fastcall, and
>we do it via compiler options kernel-wide nowadays.
>
>The above will work fine. You can probably just open-code it at the place
>where you're unlinking the file.
>
>(why are you trying to unlink the old file anyway?)
>
For security measure :O
I tried on solaris: touch the core file as user, open it and wait, dump core
as root -> nope, couldn't read the damn core - it was unlinked and created!
So do I want.
I will sent the new patch from home.
next reply other threads:[~2004-04-22 9:40 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-22 9:40 Peter Waechtler [this message]
2004-04-22 9:56 ` [PATCH] coredump - as root not only if euid switched Andrew Morton
2004-04-22 19:43 ` Peter Wächtler
2004-04-22 19:53 ` Chris Wright
2004-04-22 20:05 ` Linus Torvalds
-- strict thread matches above, loose matches on Subject: below --
2004-04-23 15:35 Albert Cahalan
2004-04-23 19:14 ` Peter Wächtler
2004-04-23 17:22 ` Albert Cahalan
2004-04-23 7:46 Peter Waechtler
2004-04-23 7:16 Peter Waechtler
2004-04-23 17:10 ` Chris Wright
2004-04-23 19:05 ` Peter Wächtler
2004-04-23 7:14 Peter Waechtler
2004-04-22 8:51 Peter Waechtler
2004-04-22 8:55 ` Andrew Morton
2004-04-21 19:20 Peter Wächtler
2004-04-22 1:18 ` Andrew Morton
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