dmesg info/output Low Memory error?

[kernelbasher]

14.04_64

[40789.092651] scsi 9:0:0:0: Direct-Access     WD       5000AAV External 1.04 PQ: 0 ANSI: 4[40789.092917] sd 9:0:0:0: Attached scsi generic sg5 type 0
[40789.093727] sd 9:0:0:0: [sdd] 976773168 512-byte logical blocks: (500 GB/465 GiB)
[40789.094763] sd 9:0:0:0: [sdd] Write Protect is off
[40789.094767] sd 9:0:0:0: [sdd] Mode Sense: 21 00 00 00
[40789.097278] sd 9:0:0:0: [sdd] No Caching mode page found
[40789.097283] sd 9:0:0:0: [sdd] Assuming drive cache: write through
[40789.100262] sd 9:0:0:0: [sdd] No Caching mode page found
[40789.100265] sd 9:0:0:0: [sdd] Assuming drive cache: write through
[40789.110029]  sdd: sdd1
[40789.138510] sd 9:0:0:0: [sdd] No Caching mode page found
[40789.138513] sd 9:0:0:0: [sdd] Assuming drive cache: write through
[40789.138516] sd 9:0:0:0: [sdd] Attached SCSI disk
[40800.988034] Corrupted low memory at ffff88000000cae8 (cae8 phys) = 400000000000

That's just a snip of the tail end
If you need more just ask

Any ideas?