linux-kernel - [PATCH 4.9 025/111] video: fbdev: pxafb: clear allocated memory for video modes

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Message-Id: <20180924113106.977527991@linuxfoundation.org>
Date:   Mon, 24 Sep 2018 13:51:52 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Robert Jarzmik <robert.jarzmik@...e.fr>,
        Daniel Mack <daniel@...que.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.9 025/111] video: fbdev: pxafb: clear allocated memory for video modes

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Mack <daniel@...que.org>

[ Upstream commit b951d80aaf224b1f774e10def672f5e37488e4ee ]

When parsing the video modes from DT properties, make sure to zero out
memory before using it. This is important because not all fields in the mode
struct are explicitly initialized, even though they are used later on.

Fixes: 420a488278e86 ("video: fbdev: pxafb: initial devicetree conversion")
Reviewed-by: Robert Jarzmik <robert.jarzmik@...e.fr>
Signed-off-by: Daniel Mack <daniel@...que.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/video/fbdev/pxafb.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/video/fbdev/pxafb.c
+++ b/drivers/video/fbdev/pxafb.c
@@ -2128,8 +2128,8 @@ static int of_get_pxafb_display(struct d
 		return -EINVAL;
 
 	ret = -ENOMEM;
-	info->modes = kmalloc_array(timings->num_timings,
-				    sizeof(info->modes[0]), GFP_KERNEL);
+	info->modes = kcalloc(timings->num_timings, sizeof(info->modes[0]),
+			      GFP_KERNEL);
 	if (!info->modes)
 		goto out;
 	info->num_modes = timings->num_timings;