[media] V4L2: fix VIDIOC_CREATE_BUFS 32-bit compatibility mode data copy-back

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Similar to an earlier patch, fixing reading user-space data for the
VIDIOC_CREATE_BUFS ioctl() in 32-bit compatibility mode, this patch fixes
writing back of the possibly modified struct to the user. However, unlike
the former bug, this one is much less harmful, because it only results in
the kernel failing to write the .type field back to the user, but in fact
this is likely unneeded, because the kernel will hardly want to change
that field. Therefore this bug is more of a theoretical nature.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

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Guennadi Liakhovetski 2014-05-30 20:26:38 -03:00 • committed by Mauro Carvalho Chehab

parent 66ae9fc237

commit 6ed9b28504

1 changed files with 6 additions and 4 deletions

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drivers/media/v4l2-core/v4l2-compat-ioctl32.c

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