tree 464a99a2be2f87b8e019fea231592ddf3ec38de7
parent 66191dc622f5ff0a541524c4e96fdacfacfda206
author Jens Axboe <jens.axboe@oracle.com> 1202489354 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1202491501 -0800

splice: missing user pointer access verification

vmsplice_to_user() must always check the user pointer and length
with access_ok() before copying. Likewise, for the slow path of
copy_from_user_mmap_sem() we need to check that we may read from
the user region.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Cc: Wojciech Purczynski <cliph@research.coseinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>