Some unscrupulous user could come along and just delete it now! mkisofs.. 7. : Reading kmem addr in UnixWare (/dev/kmem) 8. But, unless some sort of important user shows up, chances are that /dev/kmem will not survive into 2.6.14. An ACL for a separate group -- e.g., kmem -- on /dev/kmem would reduce the risk. have a peek here
It does not even try to solve the whole problem, in that it still fails to properly check the full address range requested by the application. All product names are trademarks of their respective companies. That's what permissions are for. –Henno Brandsma Mar 13 '14 at 6:53 1 Please explain why do you need to access /dev/mem from an ordinary id .... –Basile Starynkevitch Mar We ran into the same problem once when we forgot to run the root.sh 0 Kudos Reply Roger Baptiste Honored Contributor [Founder] Options Mark as New Bookmark Subscribe Subscribe to RSS website here
Statements on Sun products included here are not gospel and may be fiction rather than truth. This is a nice quote, I think it should go into a fortune cookie database (if the author doesn't mind, of course). This mistake would almost certainly be a security hole, except that only root can access /dev/kmem in the first place. To > my knowledge AIX was one of the first systems to allow this; Solaris > finally caught up at version 8 (Sun calls the command setfacl(1).) > I haven't found
How to stop NPCs from picking up dropped items Does Intel sell CPUs in ribbons? See mem(4) (you could use setuid techniques if so wanted) If you need to access virtual memory in the address space of some other process, consider proc(5) e.g. /proc/1234/mem for process Solve problems - It's Free Create your account in seconds E-mail address is taken If this is your account,sign in here Email address Username Between 5 and 30 characters. /dev/mem Example The time now is 07:20 PM. - Contact Us - UNIX & Linux - unix commands, linux commands, linux server, linux ubuntu, shell script, linux distros. - Advertising - Top
Since kmem provides virtual addresses it's perfect for KME, but the kernel function read_kmem() returns EPERM in all cases and mmap_kmem() doesn't work as corbet points out above. a "ps" for HP-UX), configuration and many other general uses mentioned before (debugging, patching, etc.) . The resulting inquiry has led to people asking whether /dev/kmem should exist at all. Using the AIX aclput(1) >command allows one to leave the group unchanged and to declare a >new group -- kmem in my example -- that has read privileges.
Permissions on /dev/kmem and /dev/mem for top? 4. Config_strict_devmem Who needs /dev/kmem? Farewell, foul hack, you are not missed. In brief: I've never used /dev/kmem to r/w main memory on any OS.
Go to Solution. 0 Kudos Reply All Forum Topics Previous Topic Next Topic 6 REPLIES Steven Sim Kok Leong Honored Contributor [Founder] Options Mark as New Bookmark Subscribe Subscribe to RSS check it out Check the permissions on (say) top; if it's setgid kmem, then kmem/mem will have to be group kmem, or else world read, for it to work. /dev/kmem Linux Has anyone had any experience with getting the UNIX OS Agent running in a zone on Solaris 10. Dev Mem Bad Address Top 1. /dev/kmem permission denied I have sunos4.1 station and when I have tried to type ps command I got /dev/kmem permission denied 2.
Patzebike replied Oct 11, 2010 Hello , many ways to investigate : - perm of /dev (should be 775) - perm of /dev/kmem (add "r" for other) - have a look navigate here c linux memory-management share|improve this question asked Mar 13 '14 at 5:24 mk.. 4,17873454 1 What is your "id", are you root? –osgx Mar 13 '14 at 5:29 It has been suggested that root kits are the largest user community for this kind of access, but there are no forward compatibility guarantees for root kit authors. My first idea was to explain the background of these devices, the reasons why they were created at first time in AT&T Unix VI. /dev/mem Mmap
Log in to reply. How To Read /dev/mem In Linux, we stress serving a diverse audience, so we don't ask "why should we keep this feature?" We ask, "why shouldn't we?" Things get dropped because no one is maintaining http://www.courtesan.com/sudo/ You _don't_ want to let all non-root users read from /dev/kmem.
I probably should have said "This is similar to" rather than "This is pretty much", though. ie : - " --------------------- Start Oracle SQLCA ---------------------- sqlcaid: sqlabs: 0 sqlcode: -3114 sqlerrml: 35 sqlerrmc: ORA-03114: not connected to ORACLE sqlerrp: sqlerrd: sqlwarn: sqlext: --------------------- End Oracle SQLCA ---------------------- He was trying to read the value of a kernel variable using /dev/kmem, but his attempts returned an I/O error. Dev Mem Physical Address Posted Aug 19, 2005 0:21 UTC (Fri) by giraffedata (subscriber, #1954) [Link] It's not just for debug hacking; other kinds of quick hacks are also made possible.
This method changes the >group ownership of /dev/mem and /dev/kmem. Who needs /dev/kmem? Any more ideas?Maria 0 Kudos Reply Steven Sim Kok Leong Honored Contributor [Founder] Options Mark as New Bookmark Subscribe Subscribe to RSS Feed Highlight Print Email to a Friend Report Inappropriate http://rinfix.com/how-to/utorrent-cannot-open-torrent.html It should be removed from mainline too.
Top /dev/kmem: Permission denied by Vic Abe » Sat, 08 Mar 1997 04:00:00 >I prefer having them sgid sys (or kmem, on SunOS 4). >I don't like any third party programs Toolbox.com is not affiliated with or endorsed by any company listed at this site. Is this because I'm logged in as someone who doesn't have the proper rights to execute the command. Top /dev/kmem permissions by Chris Costell » Sun, 02 Jul 2000 04:00:00 > In order to run commands like crash, pstat etc.
Using the AIX aclput(1) command allows one to leave the group unchanged and to declare a new group -- kmem in my example -- that has read privileges. It is not used... I.e. Java Report Engine for Seagate Crystal Reports (Server Runtime) 9. /dev/mem and /dev/kmem with world access? 10.
Start a new thread here 3806289 Related Discussions LPARs: troubleshooting network connectivity problems Virtual I/O questions with p520 VIO - SEA - Virtual Ethernet Adapter - HSCL151A Missing dual path on Nat Top /dev/kmem: Permission denied by Volker Borche » Sat, 08 Mar 1997 04:00:00 |> > Does anyone know why I get the following message when I try I have no problems when I execute them as root. Show: 10 25 50 100 items per page Previous Next Feed for this topic
Addtitional details if they help: 1) I checked my configuration that CONFIG_STRICT_DEVMEM is enabled. 2) ls -l /dev/mem crw-r----- 1 root kmem 1, 1 2014-03-13 13:57 /dev/mem Please let me know QGIS Print composer scale problems Isn't AES-NI useless because now the key length need to be longer?