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List:       linaro-mm-sig
Subject:    [Linaro-mm-sig] [PATCH 3/3] udmabuf: check that flags has no unsupported bits set
From:       Gerd Hoffmann <kraxel () redhat ! com>
Date:       2019-08-22 9:36:54
Message-ID: 20190822093654.23752-4-kraxel () redhat ! com
[Download RAW message or body]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reported-by: Yann Droneaud <ydroneaud@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

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