lkml.org 
[lkml]   [2007]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 4/4] coredump: documentation for proc and sysctl]
Hi Pavel and Andrew,

Pavel Machek wrote:
>>This patch adds the documentation for the following parameters:
>> /proc/<pid>/core_flags
>> /proc/sys/kernel/core_flags_enable
>
> Sysctl seems really strange to me. Either the feature is safe to use,
> or it is not. Users can already ulimit -c 0, and we do not have
> "/proc/sys/kernel/allow_users_to_disable_their_core_dumps".

Oh, I had forgotten that. Thank you for pointing out. The purpose of
this sysctl is to prevent a bad process from hiding its memory.
But as you say, this sysctl isn't enough for the purpose.

Andrew wrote:
> Does this feature have any security implications? For example, there might
> be system administration programs which force a coredump on a "bad"
> process, and leave the core somewhere for the administrator to look at.

I have never heard of the story that ulimit -c 0 bothered an
administrator who wanted to force a coredump. So even without this
sysctl, the administrator wouldn't bother about security concerns.
I'll drop it from the next version.

Thanks,
--
Hidehiro Kawai
Hitachi, Ltd., Systems Development Laboratory


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-01-30 08:43    [W:2.883 / U:0.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site