tree 14170d74d5040be49af14b484f252d888141a99f
parent f3f63c1c28bc861a931fac283b5bc3585efb8967
author Jens Axboe <jaxboe@fusionio.com> 1289396185 +0100
committer Jens Axboe <jaxboe@fusionio.com> 1289396443 +0100

bio: take care not overflow page count when mapping/copying user data

If the iovec is being set up in a way that causes uaddr + PAGE_SIZE
to overflow, we could end up attempting to map a huge number of
pages. Check for this invalid input type.

Reported-by: Dan Rosenberg <drosenberg@vsecurity.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>