Backport CVE-2017-13166 fixes to Kernel 3.18

Hi Greg,

Those are the backports meant to solve CVE-2017-13166 on Kernel 3.18.

It contains two v4l2-ctrls fixes that are required to avoid crashes at the test application.

I wrote two patches myself for Kernel 3.18 in order to solve some issues specific for Kernel 3.18 with aren't needed upstream. one is actually a one-line change backport. The other one makes sure that both 32-bits and 64-bits version of some ioctl calls will return the same value for a reserved field.

I noticed an extra bug while testing it, but the bug also hits upstream, and should be backported all the way down all stable/LTS versions. So, I'll send it the usual way, after merging upsream.

Regards,
Mauro

Daniel Mentz (2):
media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha
media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic

Hans Verkuil (12):
media: v4l2-ioctl.c: don't copy back the result for -ENOTTY
media: v4l2-compat-ioctl32.c: add missing VIDIOC_PREPARE_BUF
media: v4l2-compat-ioctl32.c: fix the indentation
media: v4l2-compat-ioctl32.c: move 'helper' functions to

    __get/put_v4l2_format32

media: v4l2-compat-ioctl32.c: avoid sizeof(type)
media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32
media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer
media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs
media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type
media: v4l2-compat-ioctl32.c: don't copy back the result for certain
errors
media: v4l2-ctrls: fix sparse warning

Mauro Carvalho Chehab (2):
media: v4l2-compat-ioctl32: use compat_u64 for video standard
media: v4l2-compat-ioctl32: initialize a reserved field

Ricardo Ribalda (2):
vb2: V4L2_BUF_FLAG_DONE is set after DQBUF
media: media/v4l2-ctrls: volatiles should not generate CH_VALUE

 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1020 +++++++++++++++----------
 drivers/media/v4l2-core/v4l2-ctrls.c          |   96 ++-
 drivers/media/v4l2-core/v4l2-ioctl.c          |    5 +-
 drivers/media/v4l2-core/videobuf2-core.c      |    5 +
 4 files changed, 691 insertions(+), 435 deletions(-)

2.14.3