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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        syzbot+0cc8e3cc63ca373722c6@syzkaller.appspotmail.com,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Subject: [PATCH 3.18 27/47] media: vivid: free bitmap_cap when updating std/timings/etc.
Date:   Fri, 11 Jan 2019 15:08:12 +0100
Message-Id: <20190111130959.567221715@linuxfoundation.org>
In-Reply-To: <20190111130956.170952125@linuxfoundation.org>
References: <20190111130956.170952125@linuxfoundation.org>
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3.18-stable review patch.  If anyone has any objections, please let me know.

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

From: Hans Verkuil <hverkuil-cisco@xs4all.nl>

commit 560ccb75c2caa6b1039dec1a53cd2ef526f5bf03 upstream.

When vivid_update_format_cap() is called it should free any overlay
bitmap since the compose size will change.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+0cc8e3cc63ca373722c6@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>      # for v3.18 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/platform/vivid/vivid-vid-cap.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -454,6 +454,8 @@ void vivid_update_format_cap(struct vivi
 		tpg_s_rgb_range(&dev->tpg, v4l2_ctrl_g_ctrl(dev->rgb_range_cap));
 		break;
 	}
+	vfree(dev->bitmap_cap);
+	dev->bitmap_cap = NULL;
 	vivid_update_quality(dev);
 	tpg_reset_source(&dev->tpg, dev->src_rect.width, dev->src_rect.height, dev->field_cap);
 	dev->crop_cap = dev->src_rect;