Bug 1008850

Summary: /dev/pts/ptmx Centos 6.4
Product: Red Hat Enterprise Linux 6 Reporter: micheal <maciej.michalsk>
Component: device-mapperAssignee: LVM and device-mapper development team <lvm-team>
Status: CLOSED INSUFFICIENT_DATA QA Contact: Cluster QE <mspqa-list>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 6.4CC: agk, dwysocha, heinzm, jbrassow, maciej.michalsk, msnitzer, prajnoha, prockai, thornber, zkabelac
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Other   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-07-17 16:50:58 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description micheal 2013-09-17 07:58:13 UTC 
I have a problem with the server running on CentOS. CentOs has been upgraded to version 6.4 and has wsystkie updates. Updates were made according to the official repositories. On the server running the V-Server.

#--------------------------------------------FSTAB------------------------------------------#
# Device Mountpoint FStype Options Dump Pass
/dev/sda1 /boot ext3 rw,noatime 1 2
/dev/vg0/root / ext3 rw,noatime 1 1
/dev/vg0/swap none swap sw 0 0
/dev/vg0/usr /usr ext3 rw,noatime 1 2
/dev/vg0/var /var ext3 rw,noatime 1 2
/dev/vg0/log /var/log ext3 rw,noatime 1 2
/dev/vg0/tmp /tmp ext3 rw,noatime,nosuid,noexec 1 2
/dev/vg0/home /home ext3 rw,noatime 1 2
/dev/vg0/vz /vservers ext3 rw,noatime 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0

The problem is with / dev / pts / ptmx

#host /dev/pts > ls -la
total 0
drwxr-xr-x 2 root root 0 Sep 12 12:34 .
drwxr-xr-x 18 root root 3860 Sep 12 12:34 ..
crw--w---- 1 mmichalski tty 136, 0 Sep 12 12:53 0
c--------- 1 root root 5, 2 Sep 12 12:34 ptmx

As you can see it has no rights. The same situation is running virtual. Below is the fstab file virtual

none /proc proc defaults 0 0
none /tmp tmpfs size=16m,mode=1777 0 0
none /dev/pts devpts gid=5,mode=620 0 0

What can cause this problem and where to look for solutions?
Comment 2 Zdenek Kabelac 2014-01-28 14:08:00 UTC 
Hmm - what is the actual problem?

How it is related to device mapper?

Is lvm2 reading this device ?

Or your problem with just access rights ? (Then I'd have guessed it's a bug for udevd and udev rules or eventually systemd)