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From:   Alexey Khoroshilov <khoroshilov@ispras.ru>
To:     Markus Elfring <elfring@users.sourceforge.net>,
        "Lad, Prabhakar" <prabhakar.csengg@gmail.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>
Cc:     Alexey Khoroshilov <khoroshilov@ispras.ru>,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        ldv-project@linuxtesting.org
Subject: [PATCH] [media] DaVinci-VPBE: fix error handling in vpbe_initialize()
Date:   Sat, 24 Nov 2018 00:56:26 +0300
Message-Id: <1543010186-10244-1-git-send-email-khoroshilov@ispras.ru>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

If vpbe_set_default_output() or vpbe_set_default_mode() fails,
vpbe_initialize() returns error code without releasing resources.

The patch adds error handling for that case.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
 drivers/media/platform/davinci/vpbe.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/davinci/vpbe.c b/drivers/media/platform/davinci/vpbe.c
index 18c035ef84cf..df1ae6b5c854 100644
--- a/drivers/media/platform/davinci/vpbe.c
+++ b/drivers/media/platform/davinci/vpbe.c
@@ -740,7 +740,7 @@ static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
 	if (ret) {
 		v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default output %s",
 			 def_output);
-		return ret;
+		goto fail_kfree_amp;
 	}
 
 	printk(KERN_NOTICE "Setting default mode to %s\n", def_mode);
@@ -748,12 +748,15 @@ static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
 	if (ret) {
 		v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default mode %s",
 			 def_mode);
-		return ret;
+		goto fail_kfree_amp;
 	}
 	vpbe_dev->initialized = 1;
 	/* TBD handling of bootargs for default output and mode */
 	return 0;
 
+fail_kfree_amp:
+	mutex_lock(&vpbe_dev->lock);
+	kfree(vpbe_dev->amp);
 fail_kfree_encoders:
 	kfree(vpbe_dev->encoders);
 fail_dev_unregister:
-- 
2.7.4