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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, Dillon Min <dillon.minfei@gmail.com>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 058/188] media: s5p-g2d: Fix a memory leak on ctx->fh.m2m_ctx
Date:   Mon, 19 Jul 2021 16:50:42 +0200
Message-Id: <20210719144926.543430599@linuxfoundation.org>
In-Reply-To: <20210719144913.076563739@linuxfoundation.org>
References: <20210719144913.076563739@linuxfoundation.org>
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From: Dillon Min <dillon.minfei@gmail.com>

[ Upstream commit 5d11e6aad1811ea293ee2996cec9124f7fccb661 ]

The m2m_ctx resources was allocated by v4l2_m2m_ctx_init() in g2d_open()
should be freed from g2d_release() when it's not used.

Fix it

Fixes: 918847341af0 ("[media] v4l: add G2D driver for s5p device family")
Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/platform/s5p-g2d/g2d.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/platform/s5p-g2d/g2d.c b/drivers/media/platform/s5p-g2d/g2d.c
index 2b939555cccb..21968ef9dc45 100644
--- a/drivers/media/platform/s5p-g2d/g2d.c
+++ b/drivers/media/platform/s5p-g2d/g2d.c
@@ -282,6 +282,9 @@ static int g2d_release(struct file *file)
 	struct g2d_dev *dev = video_drvdata(file);
 	struct g2d_ctx *ctx = fh2ctx(file->private_data);
 
+	mutex_lock(&dev->mutex);
+	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+	mutex_unlock(&dev->mutex);
 	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 	v4l2_fh_del(&ctx->fh);
 	v4l2_fh_exit(&ctx->fh);
-- 
2.30.2