CentOS 5 Hardware :: Attempt To Access Beyond End Of Device

I have a LVM snapshot that triggers these kernel errors when any LVM-related commands run:

Jul 6 10:31:38 itmanager kernel: attempt to access beyond end of device
Jul 6 10:31:38 itmanager kernel: dm-28: rw=0, want=66156996183394672, limit=25165824

dm-28 is the snapshot volume in device mapper. I think this error is generated because most LVM commands will check the first 4K of various drives and volumes for LVM metadata and labels, but attempts to read any of the first eight sectors (ie: 4K) of this particular snapshot logical volume trigger this error.The most interesting thing is that the snapshot is 25165824 sectors long (12G), but attempts to access the first eight sectors result in an attempt to access sector 66156996183394672!I've obtained an info dump from getinfo.sh disk, and added the output from lvs. You can find the results here:URL.. It's not as if the sectors that back the first 4K of the volume are corrupt, either: the read request never hits any hardware because the read request is attempting to read a non-sensical sector, instead of the correct sector. Perhaps the COW metadata for the snapshot is corrupt?

How do I find the cause of this problem?Is this a critical error that I should file a bug report for?I first noticed this some time after turning the machine on Sunday afternoon.As far as I can tell from the logs, the shutdown the previous evening was normal.I use LVM fairly heavily on this machine, and this is the first time I've ever seen this kind of problem..I've worked around the problem by copying the first eight sectors from the Origin volume, and the rest from the Snapshot volume, to a new normal logical volume.However, I'm still concerned about how this error occurred in the first place.