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

[Gerd Hoffmann]

Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
Reported-by: Yann Droneaud <ydrone...@opteya.com>
---
 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 6c3ec8fcef01..ca1364102b18 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -131,6 +131,9 @@ 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;
-- 
2.18.1