[PATCH 23/26] media: staging: imgu: use array_size

[Julia Lawall]

Use array_size to protect against multiplication overflows.

The changes were done using the following Coccinelle semantic patch:

// <smpl>
@@
    expression E1, E2;
    constant C1, C2;
    identifier alloc = {vmalloc,vzalloc};
@@
    
(
      alloc(C1 * C2,...)
|
      alloc(
-           (E1) * (E2)
+           array_size(E1, E2)
      ,...)
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxxx>

---
 drivers/staging/media/ipu3/ipu3-mmu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/media/ipu3/ipu3-mmu.c b/drivers/staging/media/ipu3/ipu3-mmu.c
index cb9bf5fb29a5..9c4adb815c94 100644
--- a/drivers/staging/media/ipu3/ipu3-mmu.c
+++ b/drivers/staging/media/ipu3/ipu3-mmu.c
@@ -464,7 +464,7 @@ struct imgu_mmu_info *imgu_mmu_init(struct device *parent, void __iomem *base)
 	 * Allocate the array of L2PT CPU pointers, initialized to zero,
 	 * which means the dummy L2PT allocated above.
 	 */
-	mmu->l2pts = vzalloc(IPU3_PT_PTES * sizeof(*mmu->l2pts));
+	mmu->l2pts = vzalloc(array_size(IPU3_PT_PTES, sizeof(*mmu->l2pts)));
 	if (!mmu->l2pts)
 		goto fail_l2pt;