linux-kernel - [PATCH] media: rcar_drif: fix a memory disclosure

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Message-Id: <20191018044701.4786-1-kjlu@umn.edu>
Date:   Thu, 17 Oct 2019 23:47:00 -0500
From:   Kangjie Lu <kjlu@....edu>
To:     kjlu@....edu
Cc:     Ramesh Shanmugasundaram <ramesh.shanmugasundaram@...renesas.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] media: rcar_drif: fix a memory disclosure

"f->fmt.sdr.reserved" is uninitialized. As other peer drivers
like msi2500 and airspy do, the fix initializes it to avoid
memory disclosures.

Signed-off-by: Kangjie Lu <kjlu@....edu>
---
 drivers/media/platform/rcar_drif.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/rcar_drif.c b/drivers/media/platform/rcar_drif.c
index 608e5217ccd5..0f267a237b42 100644
--- a/drivers/media/platform/rcar_drif.c
+++ b/drivers/media/platform/rcar_drif.c
@@ -912,6 +912,7 @@ static int rcar_drif_g_fmt_sdr_cap(struct file *file, void *priv,
 {
 	struct rcar_drif_sdr *sdr = video_drvdata(file);
 
+	memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 	f->fmt.sdr.pixelformat = sdr->fmt->pixelformat;
 	f->fmt.sdr.buffersize = sdr->fmt->buffersize;
 
-- 
2.17.1