[PATCH v3 2/3] udmabuf: check that __pad is zero

[Gerd Hoffmann <kraxel@xxxxxxxxxx>]

Reported-by: Yann Droneaud <ydroneaud@xxxxxxxxxx>
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
 drivers/dma-buf/udmabuf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 9edabce0b8..964beadd11 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -134,6 +134,8 @@ static long udmabuf_create(const struct udmabuf_create_list *head,
 
 	pglimit = (size_limit_mb * 1024 * 1024) >> PAGE_SHIFT;
 	for (i = 0; i < head->count; i++) {
+		if (list[i].__pad)
+			goto err;
 		if (!IS_ALIGNED(list[i].offset, PAGE_SIZE))
 			goto err;
 		if (!IS_ALIGNED(list[i].size, PAGE_SIZE))
-- 
2.9.3