[PATCH v3 3/3] udmabuf: check that flags has no unsupported bits set

[Gerd Hoffmann <kraxel@xxxxxxxxxx>]

Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Reported-by: Yann Droneaud <ydroneaud@xxxxxxxxxx>
---
 drivers/dma-buf/udmabuf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 964beadd11..acd97670c5 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -128,6 +128,9 @@ static long udmabuf_create(const struct udmabuf_create_list *head,
 	int seals, ret = -EINVAL;
 	u32 i, flags;
 
+	if (head->flags & ~UDMABUF_FLAGS_CLOEXEC)
+		return -EINVAL;
+
 	ubuf = kzalloc(sizeof(*ubuf), GFP_KERNEL);
 	if (!ubuf)
 		return -ENOMEM;
-- 
2.9.3