linux-kernel - [PATCH RFT/RFC v2 35/47] staging: media: zoran: Add more check for compliance

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Date:   Fri, 25 Sep 2020 18:30:45 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     gregkh@...uxfoundation.org, mchehab@...nel.org, hverkuil@...all.nl,
        laurent.pinchart@...asonboard.com
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH RFT/RFC v2 35/47] staging: media: zoran: Add more check for compliance

The zoran driver miss some sanity checks, and this made v4l compliance
happy.

Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
 drivers/staging/media/zoran/zoran_driver.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/staging/media/zoran/zoran_driver.c b/drivers/staging/media/zoran/zoran_driver.c
index 60bbc8235cff..5ac832eca501 100644
--- a/drivers/staging/media/zoran/zoran_driver.c
+++ b/drivers/staging/media/zoran/zoran_driver.c
@@ -1092,6 +1092,11 @@ static int zoran_enum_fmt(struct zoran *zr, struct v4l2_fmtdesc *fmt, int flag)
 {
 	unsigned int num, i;
 
+	if (fmt->index >= ARRAY_SIZE(zoran_formats))
+		return -EINVAL;
+	if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
 	for (num = i = 0; i < NUM_FORMATS; i++) {
 		if (zoran_formats[i].flags & flag && num++ == fmt->index) {
 			strscpy(fmt->description, zoran_formats[i].name,
@@ -1255,6 +1260,12 @@ static int zoran_try_fmt_vid_cap(struct file *file, void *__fh,
 	if (i == NUM_FORMATS)
 		return -EINVAL;
 
+	fmt->fmt.pix.colorspace = zoran_formats[i].colorspace;
+	if (BUZ_MAX_HEIGHT < (fmt->fmt.pix.height * 2))
+		fmt->fmt.pix.field = V4L2_FIELD_INTERLACED;
+	else
+		fmt->fmt.pix.field = V4L2_FIELD_TOP;
+
 	bpp = DIV_ROUND_UP(zoran_formats[i].depth, 8);
 	v4l_bound_align_image(&fmt->fmt.pix.width, BUZ_MIN_WIDTH, BUZ_MAX_WIDTH, bpp == 2 ? 1 : 2,
 		&fmt->fmt.pix.height, BUZ_MIN_HEIGHT, BUZ_MAX_HEIGHT, 0, 0);
@@ -1283,6 +1294,9 @@ static int zoran_s_fmt_vid_out(struct file *file, void *__fh,
 		return res;
 	}
 
+	if (!fmt->fmt.pix.height || !fmt->fmt.pix.width)
+		return -EINVAL;
+
 	settings = zr->jpg_settings;
 
 	/* we actually need to set 'real' parameters now */
@@ -1872,6 +1886,9 @@ static int zoran_s_selection(struct file *file, void *__fh, struct v4l2_selectio
 	    sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		return -EINVAL;
 
+	if (!sel->r.width || !sel->r.height)
+		return -EINVAL;
+
 	if (sel->target != V4L2_SEL_TGT_CROP)
 		return -EINVAL;
 
-- 
2.26.2