On Thu, 15 Jan 2009, Eric Auer wrote:

EA >
EA >Hi Bonnie and happy new year still :-)

Happy new year to you!

Are you suffering from the heating gas turn off for the gas line passing 
through the Ukraine?


EA >
EA >Bonnie Dalzell wrote:
EA >
EA >> i use freedos from a dos formatted partition to boot into full screen 
EA >> freedos on a machine that also boots linux. i am happy with that.
EA >> 
EA >> i also use freedos to boot from within a linux partition using xdosemu.
EA >> 
EA >> i am happy with that except i have to run a little script first.
EA >> 
EA >> this is the script
EA >> 
EA >> #! /bin/bash
EA >> echo 0 | sudo tee /proc/sys/vm/mmap_min_addr
EA >
EA >True true... I wonder how bad it would be if Ubuntu and
EA >Debian made this the default anyway. Instead of a script,
EA >I simply changed the global settings in /etc/sysctl.conf:
EA >
EA >(the file is longer, I only paste the modified lines here)
EA >
EA ># protect bottom 64k of memory from mmap to prevent NULL-dereference
EA ># --- breaks dosemu and wine --- vm.mmap_min_addr = 65536
EA >vm.mmap_min_addr = 0



here is the reason given in my default /etc/sysctl.conf file

# protect bottom 64k of memory from mmap to prevent NULL-dereference
# attacks against potential future kernel security vulnerabilities.
# (Added in kernel 2.6.23.)
# vm.mmap_min_addr = 65536

how do they know it is a FUTURE kernel security vulnerability?

time machine?

 :-)



EA >
EA >With this modification, after the next reboot, you no longer
EA >have to run the script any more.
EA >
EA >Eric
EA >
EA >PS: I wonder when the dosemu.org page will describe 1.4 ;-)
EA >
EA >
EA 
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EA >

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                       Bonnie Dalzell, MA
mail:5100 Hydes Rd PO Box 60, Hydes,MD,USA 21082-0060|EMAIL:bdalz...@qis.net

freelance anatomist, vertebrate paleontologist, writer, illustrator, dog
breeder, computer nerd & iconoclast... Borzoi info at www.borzois.com.
Editor Net.Pet Online Animal Magazine  - http://www.netpetmagazine.com
HOME http://www.qis.net/~borzoi/          BUSINESS http://www.batw.com


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