linux-kernel - [PATCH AUTOSEL 5.2 022/249] media: ov7740: avoid invalid framesize setting

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190715133550.1772-22-sashal@kernel.org>
Date:   Mon, 15 Jul 2019 09:32:03 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Akinobu Mita <akinobu.mita@...il.com>,
        Wenyou Yang <wenyou.yang@...rochip.com>,
        Eugen Hristev <eugen.hristev@...rochip.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Sasha Levin <sashal@...nel.org>, linux-media@...r.kernel.org
Subject: [PATCH AUTOSEL 5.2 022/249] media: ov7740: avoid invalid framesize setting

From: Akinobu Mita <akinobu.mita@...il.com>

[ Upstream commit 6e4ab830ac6d6a0d7cd7f87dc5d6536369bf24a8 ]

If the requested framesize by VIDIOC_SUBDEV_S_FMT is larger than supported
framesizes, it causes an out of bounds array access and the resulting
framesize is unexpected.

Avoid out of bounds array access and select the default framesize.

Cc: Wenyou Yang <wenyou.yang@...rochip.com>
Cc: Eugen Hristev <eugen.hristev@...rochip.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/i2c/ov7740.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ov7740.c b/drivers/media/i2c/ov7740.c
index 54e80a60aa57..63011d4b4738 100644
--- a/drivers/media/i2c/ov7740.c
+++ b/drivers/media/i2c/ov7740.c
@@ -785,7 +785,11 @@ static int ov7740_try_fmt_internal(struct v4l2_subdev *sd,
 
 		fsize++;
 	}
-
+	if (i >= ARRAY_SIZE(ov7740_framesizes)) {
+		fsize = &ov7740_framesizes[0];
+		fmt->width = fsize->width;
+		fmt->height = fsize->height;
+	}
 	if (ret_frmsize != NULL)
 		*ret_frmsize = fsize;
 
-- 
2.20.1