[media] media: videobuf2: fix the length check for mmap
authorMauro Carvalho Chehab <mchehab@redhat.com>
Fri, 19 Apr 2013 10:18:01 +0000 (07:18 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Thu, 25 Apr 2013 12:54:00 +0000 (09:54 -0300)
commit7f8414594e4755234fd0ca415630cfe2dfab42ce
tree4fc8507e954362d9f5898703e0c10dbd1651b2b8
parentb3404a8ef567de43b74018bbdbd989b53426d422
[media] media: videobuf2: fix the length check for mmap

Memory maps typically require that the buffer size to be page
aligned. Currently, two memops drivers do such alignment
internally, but videobuf-vmalloc doesn't.
Also, the buffer overflow check doesn't take it into account.
So, instead of doing it at each memops driver, enforce it at
VB2 core.

Reported-by: Prabhakar lad <prabhakar.csengg@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
drivers/media/v4l2-core/videobuf2-core.c
drivers/media/v4l2-core/videobuf2-dma-contig.c
drivers/media/v4l2-core/videobuf2-dma-sg.c