/proc/mounts broken

[cspalletta]

Do a google on '/dev2/root2' and you will see that /proc/mounts on Debian reports false information for the root filesystem device, and this is a longstanding problem. The result is that on systems with this problem /etc/mtab is correct but /proc/mounts is not.

This appears to be more a kernel problem than a distribution problem - how is it even _possible_ for some userspace process to get /proc/mounts to publish erroneous information?  Why are there no consistency checks in /proc/mounts?

$ cat /proc/mounts
rootfs / rootfs rw 0 0
/dev2/root2 / ext3 rw 0 0
proc /proc proc rw,nodiratime 0 0
sysfs /sys sysfs rw 0 0
devpts /dev/pts devpts rw 0 0
tmpfs /dev/shm tmpfs rw 0 0
/dev/hda1 /boot ext2 rw 0 0
usbfs /proc/bus/usb usbfs rw 0 0

$ ls -l /dev2 /dev2/root2
ls: /dev2: No such file or directory
ls: /dev2/root2: No such file or directory

$ mount -l
/dev/hda2 on / type ext3 (rw,errors=remount-ro) [debian-sarge-roo]
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/hda1 on /boot type ext2 (rw) [/boot]
usbfs on /proc/bus/usb type usbfs (rw)

$ uname -a
Linux nectarsys 2.6.10-1-k7 #1 Fri Mar 11 03:13:32 EST 2005 i686 GNU/Linux


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