Bug#731439: linux: unable to handle kernel paging request at ffffffffffffffb8 when trying to remove a file in a checkpoint directory of a NFSv4 mount from a EMC VNx Storage

[Salvatore Bonaccorso <carnil@debian.org>]

Control: retitle -1 "BUG: unable to handle kernel paging request at ffffffffffffffb8" when trying to remove a file in a checkpoint directory of a NFSv4 mount from a EMC VNx Storage
Control: found -1 3.2.14-1
Control: severity -1 important

Hi Kernel Team!

It looks that this is a 3.2.x specific regression introduced between
3.2.13-1 and 3.2.14-1. I failed for now to isolate the correct commit,
but hope you might help in that. Using a 3.2.13-1 the bug does not
appear, and trying to remove a file from such a checkpoint directory
just gives "rm: cannot remove `foo': Input/output error". Updating
3.2.14-1 and retrying the procedure panics the kernel.

(I increased the severity beeing a regression from 3.2.13-1 and which
could cause basically a DoS against other users on a multiuser
system.)

Regards,
Salvatore