block: check for proper length of iov entries in blk_rq_map_user_iov()
Ensure that we pass down properly validated iov segments before calling into the mapping or copy functions. Reported-by:Dan Rosenberg <drosenberg@vsecurity.com> Cc: stable@kernel.org Signed-off-by:
Jens Axboe <jaxboe@fusionio.com>
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