diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-20 14:40:51 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-20 14:40:51 (GMT) |
| commit | bc71c2df45e5a861818b5ee173702883df07471a (patch) | |
| tree | cd008493efad9dc936d0d2574f26dc6c9c7cb785 /drivers/dma-buf/dma-buf.c | |
| parent | 76d15c8fba655c9b2d60cf01834858f2c44483dc (diff) | |
| parent | 33688abb2802ff3a230bd2441f765477b94cc89e (diff) | |
| download | linux-bc71c2df45e5a861818b5ee173702883df07471a.tar.xz | |
Merge 4.7-rc4 into usb-next
We need the 4.7-rc4 fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/dma-buf/dma-buf.c')
| -rw-r--r-- | drivers/dma-buf/dma-buf.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 4a2c07e..6355ab3 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -33,6 +33,7 @@ #include <linux/seq_file.h> #include <linux/poll.h> #include <linux/reservation.h> +#include <linux/mm.h> #include <uapi/linux/dma-buf.h> @@ -90,7 +91,7 @@ static int dma_buf_mmap_internal(struct file *file, struct vm_area_struct *vma) dmabuf = file->private_data; /* check for overflowing the buffer's size */ - if (vma->vm_pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) > + if (vma->vm_pgoff + vma_pages(vma) > dmabuf->size >> PAGE_SHIFT) return -EINVAL; @@ -723,11 +724,11 @@ int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, return -EINVAL; /* check for offset overflow */ - if (pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) < pgoff) + if (pgoff + vma_pages(vma) < pgoff) return -EOVERFLOW; /* check for overflowing the buffer's size */ - if (pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) > + if (pgoff + vma_pages(vma) > dmabuf->size >> PAGE_SHIFT) return -EINVAL; |