I just found this mail which describes a problem which has the same root: http://www.spinics.net/lists/linux-fsdevel/msg92569.html:
root@xubuntu:~# mkdir tmp1 root@xubuntu:~# mkdir tmp2 root@xubuntu:~# mount -o bind /dev tmp1 root@xubuntu:~# ls tmp1/pts root@xubuntu:~# mount -o bind /dev/pts tmp1/pts root@xubuntu:~# ls tmp1/pts 0 1 2 3 4 5 6 ptmx root@xubuntu:~# mount -o bind /dev tmp2 root@xubuntu:~# ls tmp1/pts tmp2/pts tmp1/pts: 0 1 2 3 4 5 6 ptmx tmp2/pts: root@xubuntu:~# mount -o bind /dev/pts tmp2/pts root@xubuntu:~# ls tmp1/pts tmp2/pts tmp1/pts: 0 1 2 3 4 5 6 ptmx tmp2/pts: 0 1 2 3 4 5 6 ptmx root@xubuntu:~# grep pts /proc/mounts devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /root/tmp1/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /mnt/source/root/tmp1/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /root/tmp2/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /mnt/source/root/tmp1/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /root/tmp1/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 devpts /mnt/source/root/tmp2/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 # now you see: pts got mounted to tmp1 again and even to /mnt/source from the first test - why??? root@xubuntu:~# umount tmp1/pts # tmp1/pts should now be empty after unmounting, but it is mounted twice so the files are still visible. on the other hand: why did tmp2/pts unmount???: root@xubuntu:~# ls tmp1/pts tmp2/pts tmp1/pts: 0 1 2 3 4 5 6 ptmx tmp2/pts: root@xubuntu:~# umount tmp1/pts # umount was possible a second time root@xubuntu:~# ls tmp1/pts tmp2/pts tmp1/pts: tmp2/pts: root@xubuntu:~# -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574514 Title: Strange behaviour with mount --bind To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1574514/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
