linux-kernel - SHMEM question

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Date:	Mon, 26 Oct 2009 11:59:04 -0400
From:	Gene Heskett <gene.heskett@...izon.net>
To:	linux-kernel@...r.kernel.org
Subject: SHMEM question

Greetings;

fedora F10 system, quad core phenom, 4GB ram, ASUS M2N-SLI Deluxe mobo
kernel-2.6.32-rc5, uptime 2d 11:27 at the moment, and the system feels good.

rkhunter sent me an email this morning complaining about a data file in 
/dev/shm.

On looking at it:
[root@...ote Download]# ls -l /dev/shm
total 28
-rw-r----- 1 root root     4096 2009-10-25 12:09 mono.10594
-r-------- 1 root root 67108904 2009-10-24 00:28 pulse-shm-3880918577
-rw-rw-rw- 1 root root       16 2009-10-24 01:17 sem.ADBE_ReadPrefs_root
-rw-rw-rw- 1 root root       16 2009-10-24 01:17 sem.ADBE_REL_root
-rw-rw-rw- 1 root root       16 2009-10-24 01:17 sem.ADBE_WritePrefs_root

On grepping for SHM in the .config, I find SHMEM set to y, but about an hours 
worth of wandering around in a 'make xconfig' has failed to actually find it.

That pulse-shm-3880918577 file at over 67 megabytes is all $00 till $04000000 
into it, then there is 6 non-zero bytes and the rest is back to all balls.

Is this some indicator of a new rootkit or WTF?

It was the mono.10594 file that rkhunter-1.3.4 was concerned about.  I, since 
I can't make a mental connection between SHMEM and /dev/shm, am concerned 
about that whole tree of data which seems totally out of place in the /dev 
tree.

I hate to be a pest but Many Thanks for any enlightenment on this.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
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