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[media] media: vb2: add length check for mmap 

The length of mmap() can be bigger than length of vb2 buffer, so
it should be checked.

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Seung-Woo Kim 2013-04-11 23:57:57 -03:00 committed by Mauro Carvalho Chehab
parent 27a0aacf3e
commit 068a0df760
1 changed files with 5 additions and 0 deletions
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5
drivers/media/v4l2-core/videobuf2-core.c
View File

@ -1886,6 +1886,11 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
vb = q->bufs[buffer];
if (vb->v4l2_planes[plane].length < (vma->vm_end - vma->vm_start)) {
dprintk(1, "Invalid length\n");
return -EINVAL;
}
ret = call_memop(q, mmap, vb->planes[plane].mem_priv, vma);
if (ret)
return ret;