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[media] v4l2-ctrls: fix integer overflow in v4l2_g_ext_ctrls()
authorXi Wang <xi.wang@gmail.com>
Fri, 6 Apr 2012 12:32:36 +0000 (09:32 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Wed, 18 Apr 2012 14:09:03 +0000 (11:09 -0300)
commit5f0049bd69b96537dc7c02755c169fb4ccca3ddf
tree3fb163d8fa818edd1eaf4cfa2688c427494f9d46tree | snapshot
parent30059d93b07a034555defbf14d689a279fd7368dcommit | diff
[media] v4l2-ctrls: fix integer overflow in v4l2_g_ext_ctrls()

A large cs->count from userspace may overflow the allocation size,
leading to memory corruption.  v4l2_g_ext_ctrls() can be reached
from subdev_do_ioctl() or __video_do_ioctl().

Use kmalloc_array() to avoid the overflow.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
drivers/media/video/v4l2-ctrls.c diff | blob | history
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