linux-kernel - [PATCH 1/6] Convert virtio_console to struct

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Message-Id: <20180607145720.22590-2-willy@infradead.org>
Date:   Thu,  7 Jun 2018 07:57:15 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Matthew Wilcox <mawilcox@...rosoft.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com
Subject: [PATCH 1/6] Convert virtio_console to struct_size

From: Matthew Wilcox <mawilcox@...rosoft.com>

Signed-off-by: Matthew Wilcox <mawilcox@...rosoft.com>
---
 drivers/char/virtio_console.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 21085515814f..4bf7c06c2343 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -433,8 +433,7 @@ static struct port_buffer *alloc_buf(struct virtio_device *vdev, size_t buf_size
 	 * Allocate buffer and the sg list. The sg list array is allocated
 	 * directly after the port_buffer struct.
 	 */
-	buf = kmalloc(sizeof(*buf) + sizeof(struct scatterlist) * pages,
-		      GFP_KERNEL);
+	buf = kmalloc(struct_size(buf, sg, pages), GFP_KERNEL);
 	if (!buf)
 		goto fail;
 
-- 
2.17.0