linux-kernel - [PATCH v3 2/3] udmabuf: check that _

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Message-Id: <20180912063316.21047-3-kraxel@redhat.com>
Date:   Wed, 12 Sep 2018 08:33:15 +0200
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     laurent.pinchart@...asonboard.com, daniel@...ll.ch,
        Gerd Hoffmann <kraxel@...hat.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-media@...r.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK),
        linaro-mm-sig@...ts.linaro.org (moderated list:DMA BUFFER SHARING
        FRAMEWORK), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 2/3] udmabuf: check that __pad is zero

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